./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_2.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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:42:58,774 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:42:58,900 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:42:58,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:42:58,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:42:58,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:42:58,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:42:58,955 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:42:58,956 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:42:58,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:42:58,962 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:42:58,963 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:42:58,964 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:42:58,966 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:42:58,966 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:42:58,966 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:42:58,967 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:42:58,967 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:42:58,968 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:42:58,968 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:42:58,969 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:42:58,969 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:42:58,971 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:42:58,971 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:42:58,972 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:42:58,972 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:42:58,972 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:42:58,973 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:42:58,973 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:42:58,974 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:42:58,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:42:58,975 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:42:58,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:42:58,976 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:42:58,976 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:42:58,976 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:42:58,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:42:58,977 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:42:58,977 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:42:58,977 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:42:58,978 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:42:58,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:42:58,978 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:42:58,978 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:42:58,979 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:42:58,979 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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2023-11-12 00:42:59,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:42:59,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:42:59,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:42:59,332 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:42:59,332 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:42:59,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2023-11-12 00:43:02,488 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:43:02,668 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:43:02,669 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/sv-benchmarks/c/bitvector/num_conversion_2.c [2023-11-12 00:43:02,676 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data/66fc3ac51/48f6b41a81f74f6caf401248b826ebcc/FLAG43bdab301 [2023-11-12 00:43:02,688 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data/66fc3ac51/48f6b41a81f74f6caf401248b826ebcc [2023-11-12 00:43:02,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:43:02,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:43:02,694 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:43:02,694 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:43:02,699 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:43:02,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb4044f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02, skipping insertion in model container [2023-11-12 00:43:02,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,722 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:43:02,877 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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2023-11-12 00:43:02,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:43:02,906 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:43:02,917 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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2023-11-12 00:43:02,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:43:02,937 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:43:02,937 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02 WrapperNode [2023-11-12 00:43:02,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:43:02,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:43:02,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:43:02,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:43:02,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,954 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,980 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2023-11-12 00:43:02,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:43:02,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:43:02,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:43:02,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:43:02,993 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,993 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,995 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,995 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:02,999 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:03,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:03,004 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:03,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:03,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:43:03,009 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:43:03,010 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:43:03,010 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:43:03,011 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (1/1) ... [2023-11-12 00:43:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:43:03,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:03,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:43:03,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:43:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:43:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:43:03,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:43:03,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:43:03,147 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:43:03,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:43:03,346 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:43:03,448 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:43:03,448 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:43:03,451 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:43:03 BoogieIcfgContainer [2023-11-12 00:43:03,451 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:43:03,454 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:43:03,455 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:43:03,458 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:43:03,459 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:43:02" (1/3) ... [2023-11-12 00:43:03,459 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de21f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:43:03, skipping insertion in model container [2023-11-12 00:43:03,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:02" (2/3) ... [2023-11-12 00:43:03,460 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de21f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:43:03, skipping insertion in model container [2023-11-12 00:43:03,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:43:03" (3/3) ... [2023-11-12 00:43:03,462 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2023-11-12 00:43:03,483 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:43:03,485 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:43:03,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:43:03,551 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;@1c108606, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:43:03,552 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:43:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-12 00:43:03,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:03,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-12 00:43:03,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:03,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash 2682600, now seen corresponding path program 1 times [2023-11-12 00:43:03,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:03,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108645147] [2023-11-12 00:43:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:03,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:03,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108645147] [2023-11-12 00:43:03,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108645147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:43:03,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:43:03,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:43:03,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755567405] [2023-11-12 00:43:03,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:43:03,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:43:03,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:43:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:43:03,965 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:04,022 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2023-11-12 00:43:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:43:04,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-12 00:43:04,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:04,034 INFO L225 Difference]: With dead ends: 13 [2023-11-12 00:43:04,035 INFO L226 Difference]: Without dead ends: 6 [2023-11-12 00:43:04,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:43:04,043 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:04,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:43:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2023-11-12 00:43:04,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2023-11-12 00:43:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2023-11-12 00:43:04,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2023-11-12 00:43:04,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:04,079 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2023-11-12 00:43:04,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2023-11-12 00:43:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-12 00:43:04,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:04,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 00:43:04,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:43:04,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:04,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:04,083 INFO L85 PathProgramCache]: Analyzing trace with hash 83446001, now seen corresponding path program 1 times [2023-11-12 00:43:04,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:04,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970982585] [2023-11-12 00:43:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:04,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:04,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:04,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970982585] [2023-11-12 00:43:04,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970982585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:43:04,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364161074] [2023-11-12 00:43:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:04,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:04,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:04,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:43:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:04,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 00:43:04,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:04,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:04,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364161074] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:04,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [830440519] [2023-11-12 00:43:04,505 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-12 00:43:04,506 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:43:04,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:43:04,516 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:43:04,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:43:05,025 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:43:05,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67#(and (<= 1 |#StackHeapBarrier|) (not (= (mod |ULTIMATE.start_main_~y~0#1| 256) (mod |ULTIMATE.start_main_~x~0#1| 256))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 8 (mod |ULTIMATE.start_main_~c~0#1| 256)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:43:05,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:43:05,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:43:05,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-12 00:43:05,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402852087] [2023-11-12 00:43:05,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:05,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:43:05,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:43:05,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-12 00:43:05,117 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:05,199 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2023-11-12 00:43:05,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 00:43:05,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-12 00:43:05,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:05,201 INFO L225 Difference]: With dead ends: 12 [2023-11-12 00:43:05,201 INFO L226 Difference]: Without dead ends: 9 [2023-11-12 00:43:05,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-12 00:43:05,203 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:05,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:43:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-12 00:43:05,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-12 00:43:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-11-12 00:43:05,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2023-11-12 00:43:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:05,208 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-11-12 00:43:05,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-11-12 00:43:05,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:43:05,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:05,209 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2023-11-12 00:43:05,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:05,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:05,416 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:05,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -562845400, now seen corresponding path program 2 times [2023-11-12 00:43:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:05,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357540285] [2023-11-12 00:43:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:05,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:43:05,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357540285] [2023-11-12 00:43:05,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357540285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:43:05,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765864575] [2023-11-12 00:43:05,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:43:05,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:05,889 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:05,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:43:05,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 00:43:05,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:06,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 00:43:06,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:06,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:06,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765864575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:06,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1470524085] [2023-11-12 00:43:06,329 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-12 00:43:06,329 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:43:06,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:43:06,330 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:43:06,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 00:43:06,638 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 00:43:06,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '161#(and (<= 1 |#StackHeapBarrier|) (not (= (mod |ULTIMATE.start_main_~y~0#1| 256) (mod |ULTIMATE.start_main_~x~0#1| 256))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 8 (mod |ULTIMATE.start_main_~c~0#1| 256)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0))' at error location [2023-11-12 00:43:06,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-12 00:43:06,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 00:43:06,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2023-11-12 00:43:06,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281470321] [2023-11-12 00:43:06,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:06,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:43:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:43:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:43:06,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2023-11-12 00:43:06,774 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:07,194 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2023-11-12 00:43:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 00:43:07,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-12 00:43:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:07,204 INFO L225 Difference]: With dead ends: 18 [2023-11-12 00:43:07,204 INFO L226 Difference]: Without dead ends: 15 [2023-11-12 00:43:07,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2023-11-12 00:43:07,206 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:07,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:43:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-12 00:43:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-12 00:43:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:07,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-12 00:43:07,213 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2023-11-12 00:43:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:07,213 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-12 00:43:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-12 00:43:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-12 00:43:07,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:07,214 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2023-11-12 00:43:07,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:07,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:07,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:07,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -933805208, now seen corresponding path program 3 times [2023-11-12 00:43:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:43:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535956023] [2023-11-12 00:43:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:07,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:43:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:43:07,608 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 00:43:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 00:43:07,771 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-12 00:43:07,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 00:43:07,772 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:43:07,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:43:07,778 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-12 00:43:07,783 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 00:43:07,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 12:43:07 BoogieIcfgContainer [2023-11-12 00:43:07,809 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 00:43:07,810 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 00:43:07,810 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 00:43:07,810 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 00:43:07,810 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:43:03" (3/4) ... [2023-11-12 00:43:07,812 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-12 00:43:07,813 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 00:43:07,814 INFO L158 Benchmark]: Toolchain (without parser) took 5122.09ms. Allocated memory was 132.1MB in the beginning and 167.8MB in the end (delta: 35.7MB). Free memory was 86.2MB in the beginning and 66.3MB in the end (delta: 19.8MB). Peak memory consumption was 57.6MB. Max. memory is 16.1GB. [2023-11-12 00:43:07,815 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 132.1MB. Free memory was 97.4MB in the beginning and 97.4MB in the end (delta: 29.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:43:07,815 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.48ms. Allocated memory is still 132.1MB. Free memory was 85.7MB in the beginning and 75.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-12 00:43:07,815 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.76ms. Allocated memory is still 132.1MB. Free memory was 75.2MB in the beginning and 73.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:43:07,816 INFO L158 Benchmark]: Boogie Preprocessor took 27.11ms. Allocated memory is still 132.1MB. Free memory was 73.6MB in the beginning and 72.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 00:43:07,816 INFO L158 Benchmark]: RCFGBuilder took 441.90ms. Allocated memory was 132.1MB in the beginning and 167.8MB in the end (delta: 35.7MB). Free memory was 72.3MB in the beginning and 136.8MB in the end (delta: -64.5MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2023-11-12 00:43:07,816 INFO L158 Benchmark]: TraceAbstraction took 4354.83ms. Allocated memory is still 167.8MB. Free memory was 135.8MB in the beginning and 67.4MB in the end (delta: 68.4MB). Peak memory consumption was 68.4MB. Max. memory is 16.1GB. [2023-11-12 00:43:07,817 INFO L158 Benchmark]: Witness Printer took 3.91ms. Allocated memory is still 167.8MB. Free memory was 67.4MB in the beginning and 66.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 00:43:07,819 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 132.1MB. Free memory was 97.4MB in the beginning and 97.4MB in the end (delta: 29.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.48ms. Allocated memory is still 132.1MB. Free memory was 85.7MB in the beginning and 75.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.76ms. Allocated memory is still 132.1MB. Free memory was 75.2MB in the beginning and 73.6MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 27.11ms. Allocated memory is still 132.1MB. Free memory was 73.6MB in the beginning and 72.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 441.90ms. Allocated memory was 132.1MB in the beginning and 167.8MB in the end (delta: 35.7MB). Free memory was 72.3MB in the beginning and 136.8MB in the end (delta: -64.5MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4354.83ms. Allocated memory is still 167.8MB. Free memory was 135.8MB in the beginning and 67.4MB in the end (delta: 68.4MB). Peak memory consumption was 68.4MB. Max. memory is 16.1GB. * Witness Printer took 3.91ms. Allocated memory is still 167.8MB. Free memory was 67.4MB in the beginning and 66.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND TRUE, EXPR bit != (unsigned char)0 [L34] EXPR y = y + i [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=1, x=255, y=1] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND TRUE, EXPR bit != (unsigned char)0 [L34] EXPR y = y + i [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=2, x=255, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND TRUE, EXPR bit != (unsigned char)0 [L34] EXPR y = y + i [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=3, x=255, y=1] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND FALSE, EXPR !(bit != (unsigned char)0) [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=4, x=255, y=1] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND FALSE, EXPR !(bit != (unsigned char)0) [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=5, x=255, y=1] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND TRUE, EXPR bit != (unsigned char)0 [L34] EXPR y = y + i [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=6, x=255, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND FALSE, EXPR !(bit != (unsigned char)0) [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=7, x=255, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] EXPR ((unsigned char)1) << c [L31] unsigned char i = ((unsigned char)1) << c; [L32] EXPR x & i [L32] unsigned char bit = x & i; [L33] COND TRUE, EXPR bit != (unsigned char)0 [L34] EXPR y = y + i [L36] EXPR c = c + ((unsigned char)1) [L30-L37] { unsigned char i = ((unsigned char)1) << c; unsigned char bit = x & i; if (bit != (unsigned char)0) { y = y + i; } c = c + ((unsigned char)1); } VAL [c=8, x=255, y=1] [L30] COND FALSE !(c < (unsigned char)8) [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.3s, OverallIterations: 4, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 28 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 21 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 71 IncrementalHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 7 mSDtfsCounter, 71 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=3, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 176 SizeOfPredicates, 3 NumberOfNonLiveVariables, 96 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-12 00:43:07,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:43:10,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:43:10,635 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-11-12 00:43:10,643 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:43:10,644 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:43:10,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:43:10,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:43:10,689 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:43:10,690 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:43:10,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:43:10,695 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:43:10,696 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:43:10,697 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:43:10,698 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:43:10,699 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:43:10,699 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:43:10,701 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:43:10,701 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:43:10,702 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:43:10,702 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:43:10,703 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:43:10,703 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:43:10,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:43:10,704 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:43:10,705 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 00:43:10,705 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-12 00:43:10,705 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-12 00:43:10,706 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:43:10,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:43:10,707 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:43:10,708 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:43:10,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 00:43:10,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:43:10,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:43:10,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:43:10,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:43:10,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:43:10,711 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-12 00:43:10,711 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-12 00:43:10,712 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:43:10,713 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:43:10,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:43:10,713 INFO L153 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2023-11-12 00:43:11,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:43:11,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:43:11,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:43:11,210 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:43:11,211 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:43:11,212 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/bitvector/num_conversion_2.c [2023-11-12 00:43:14,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:43:14,588 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:43:14,590 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/sv-benchmarks/c/bitvector/num_conversion_2.c [2023-11-12 00:43:14,599 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data/115998266/13884c729a5245a6942d4ba8f352db04/FLAG051885674 [2023-11-12 00:43:14,618 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/data/115998266/13884c729a5245a6942d4ba8f352db04 [2023-11-12 00:43:14,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:43:14,625 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:43:14,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:43:14,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:43:14,634 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:43:14,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,637 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48662ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14, skipping insertion in model container [2023-11-12 00:43:14,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,660 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:43:14,836 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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2023-11-12 00:43:14,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:43:14,865 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:43:14,877 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_e6e53e89-45f2-41ee-9fe2-7a60c097b489/sv-benchmarks/c/bitvector/num_conversion_2.c[685,698] [2023-11-12 00:43:14,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:43:14,895 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:43:14,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14 WrapperNode [2023-11-12 00:43:14,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:43:14,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:43:14,897 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:43:14,897 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:43:14,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,913 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,938 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2023-11-12 00:43:14,939 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:43:14,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:43:14,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:43:14,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:43:14,950 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,981 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:14,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:43:14,987 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:43:14,987 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:43:14,987 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:43:14,988 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (1/1) ... [2023-11-12 00:43:15,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:43:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:15,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:43:15,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:43:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:43:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:43:15,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:43:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-12 00:43:15,171 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:43:15,172 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:43:15,306 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:43:15,312 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:43:15,312 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 00:43:15,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:43:15 BoogieIcfgContainer [2023-11-12 00:43:15,314 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:43:15,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:43:15,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:43:15,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:43:15,321 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:43:14" (1/3) ... [2023-11-12 00:43:15,322 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384b3832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:43:15, skipping insertion in model container [2023-11-12 00:43:15,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:43:14" (2/3) ... [2023-11-12 00:43:15,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@384b3832 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:43:15, skipping insertion in model container [2023-11-12 00:43:15,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:43:15" (3/3) ... [2023-11-12 00:43:15,324 INFO L112 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2023-11-12 00:43:15,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:43:15,346 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:43:15,398 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:43:15,405 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;@3d8691a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:43:15,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:43:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:43:15,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:15,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:43:15,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:15,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2023-11-12 00:43:15,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:43:15,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718043013] [2023-11-12 00:43:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:15,445 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:43:15,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:43:15,455 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 00:43:15,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-12 00:43:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:15,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 00:43:15,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:15,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:43:15,592 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:43:15,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718043013] [2023-11-12 00:43:15,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718043013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:43:15,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:43:15,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:43:15,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793993932] [2023-11-12 00:43:15,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:43:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 00:43:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:43:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 00:43:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:43:15,642 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:15,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:15,662 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2023-11-12 00:43:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 00:43:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:43:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:15,673 INFO L225 Difference]: With dead ends: 21 [2023-11-12 00:43:15,673 INFO L226 Difference]: Without dead ends: 9 [2023-11-12 00:43:15,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 00:43:15,681 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:15,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:43:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-12 00:43:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-12 00:43:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2023-11-12 00:43:15,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2023-11-12 00:43:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:15,735 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2023-11-12 00:43:15,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2023-11-12 00:43:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-12 00:43:15,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:15,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-12 00:43:15,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:15,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:43:15,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:15,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2023-11-12 00:43:15,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:43:15,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727603389] [2023-11-12 00:43:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:43:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:43:15,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 00:43:15,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-12 00:43:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:16,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:43:16,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:16,039 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:43:16,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:43:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727603389] [2023-11-12 00:43:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727603389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:43:16,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:43:16,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:43:16,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911079230] [2023-11-12 00:43:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:43:16,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:43:16,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:43:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:43:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:43:16,049 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:16,074 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-12 00:43:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:43:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-12 00:43:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:16,076 INFO L225 Difference]: With dead ends: 16 [2023-11-12 00:43:16,076 INFO L226 Difference]: Without dead ends: 12 [2023-11-12 00:43:16,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:43:16,078 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:16,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:43:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-12 00:43:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2023-11-12 00:43:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-11-12 00:43:16,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2023-11-12 00:43:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:16,089 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-11-12 00:43:16,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-11-12 00:43:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:43:16,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:16,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:16,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:16,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:43:16,303 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:16,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2023-11-12 00:43:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:43:16,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179607883] [2023-11-12 00:43:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:16,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:43:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:43:16,307 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 00:43:16,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-12 00:43:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:16,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:43:16,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:16,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:16,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:43:16,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179607883] [2023-11-12 00:43:16,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179607883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:16,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1296796278] [2023-11-12 00:43:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:16,463 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-12 00:43:16,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 [2023-11-12 00:43:16,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-12 00:43:16,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-12 00:43:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:16,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:43:16,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:16,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:16,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1296796278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:16,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732389260] [2023-11-12 00:43:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:43:16,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:16,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:16,619 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:16,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:43:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:43:16,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-12 00:43:16,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:16,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:16,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732389260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:16,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-12 00:43:16,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2023-11-12 00:43:16,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375769367] [2023-11-12 00:43:16,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:16,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 00:43:16,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:43:16,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 00:43:16,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:43:16,752 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:16,819 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-11-12 00:43:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 00:43:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-12 00:43:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:16,823 INFO L225 Difference]: With dead ends: 23 [2023-11-12 00:43:16,823 INFO L226 Difference]: Without dead ends: 19 [2023-11-12 00:43:16,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-12 00:43:16,825 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:16,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 00:43:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-12 00:43:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-12 00:43:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-12 00:43:16,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2023-11-12 00:43:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:16,835 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-12 00:43:16,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:16,836 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-12 00:43:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-12 00:43:16,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:16,837 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:16,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:17,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2023-11-12 00:43:17,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:17,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:17,449 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:17,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:17,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2023-11-12 00:43:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:43:17,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698094948] [2023-11-12 00:43:17,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 00:43:17,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:43:17,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:43:17,452 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 00:43:17,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-12 00:43:17,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 00:43:17,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:17,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:43:17,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:17,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:17,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:17,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:43:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698094948] [2023-11-12 00:43:17,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698094948] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284016811] [2023-11-12 00:43:17,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 00:43:17,803 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-12 00:43:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 [2023-11-12 00:43:17,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-12 00:43:17,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-11-12 00:43:17,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 00:43:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:17,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 00:43:17,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:17,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:17,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284016811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:17,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186354960] [2023-11-12 00:43:17,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 00:43:17,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:17,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:17,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:18,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 00:43:18,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 00:43:18,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:18,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:43:18,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:18,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186354960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:18,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-12 00:43:18,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 8] total 16 [2023-11-12 00:43:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511123004] [2023-11-12 00:43:18,296 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-12 00:43:18,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:43:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-12 00:43:18,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2023-11-12 00:43:18,299 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:43:18,550 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2023-11-12 00:43:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 00:43:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-12 00:43:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:43:18,551 INFO L225 Difference]: With dead ends: 41 [2023-11-12 00:43:18,552 INFO L226 Difference]: Without dead ends: 37 [2023-11-12 00:43:18,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-11-12 00:43:18,554 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:43:18,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 89 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 00:43:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-12 00:43:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-12 00:43:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-11-12 00:43:18,563 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2023-11-12 00:43:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:43:18,564 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-11-12 00:43:18,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:43:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-11-12 00:43:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 00:43:18,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:43:18,566 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-11-12 00:43:18,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:18,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:18,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 00:43:19,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:19,168 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:43:19,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:43:19,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2023-11-12 00:43:19,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-12 00:43:19,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138004489] [2023-11-12 00:43:19,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:43:19,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-12 00:43:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat [2023-11-12 00:43:19,171 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-12 00:43:19,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-12 00:43:19,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-12 00:43:19,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:19,225 WARN L260 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 00:43:19,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:23,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:28,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-12 00:43:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138004489] [2023-11-12 00:43:28,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138004489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:28,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1371749569] [2023-11-12 00:43:28,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:43:28,508 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-12 00:43:28,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 [2023-11-12 00:43:28,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-12 00:43:28,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2023-11-12 00:43:28,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-12 00:43:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:28,602 WARN L260 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-12 00:43:28,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:29,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:31,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1371749569] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:31,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352290430] [2023-11-12 00:43:31,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 00:43:31,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:43:31,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:43:31,104 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:43:31,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6e53e89-45f2-41ee-9fe2-7a60c097b489/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 00:43:31,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-12 00:43:31,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 00:43:31,169 WARN L260 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-12 00:43:31,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:43:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:34,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:43:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:43:38,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352290430] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:43:38,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-12 00:43:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28, 28, 29, 29] total 82 [2023-11-12 00:43:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748749633] [2023-11-12 00:43:38,606 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-12 00:43:38,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-12 00:43:38,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-12 00:43:38,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-12 00:43:38,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1741, Invalid=4901, Unknown=0, NotChecked=0, Total=6642 [2023-11-12 00:43:38,614 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)