./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire --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 f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:29:04,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:29:04,497 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:29:04,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:29:04,504 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:29:04,530 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:29:04,531 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:29:04,532 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:29:04,532 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:29:04,533 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:29:04,534 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:29:04,534 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:29:04,535 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:29:04,535 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:29:04,536 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:29:04,536 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:29:04,537 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:29:04,537 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:29:04,537 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:29:04,538 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:29:04,538 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:29:04,539 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:29:04,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:29:04,540 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:29:04,541 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:29:04,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:29:04,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:29:04,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:29:04,542 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:29:04,542 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:29:04,543 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:29:04,543 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:29:04,543 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:29:04,544 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:29:04,544 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:29:04,544 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:29:04,544 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:29:04,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:04,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:29:04,545 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:29:04,545 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:29:04,546 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:29:04,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:29:04,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:29:04,546 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:29:04,546 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:29:04,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:29:04,547 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_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6c91769726962c1478685c30d57ac239987d5f8a5f6832d1d60b9c031f35855 [2023-11-23 21:29:04,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:29:04,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:29:04,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:29:04,888 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:29:04,889 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:29:04,890 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2023-11-23 21:29:08,006 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:29:08,273 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:29:08,273 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c [2023-11-23 21:29:08,283 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/data/bf6e2dec4/cc13d83874854a8c92aae43ecdd87b57/FLAGc0eec0ade [2023-11-23 21:29:08,298 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/data/bf6e2dec4/cc13d83874854a8c92aae43ecdd87b57 [2023-11-23 21:29:08,301 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:29:08,303 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:29:08,304 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:08,305 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:29:08,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:29:08,311 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,313 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@585e2b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08, skipping insertion in model container [2023-11-23 21:29:08,313 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,346 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:29:08,501 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_4f3bf169-adb9-4d45-a624-1732373039ab/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[728,741] [2023-11-23 21:29:08,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:08,583 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:29:08,595 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_4f3bf169-adb9-4d45-a624-1732373039ab/sv-benchmarks/c/bitvector/soft_float_5a.c.cil.c[728,741] [2023-11-23 21:29:08,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:08,668 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:29:08,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08 WrapperNode [2023-11-23 21:29:08,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:08,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:08,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:29:08,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:29:08,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,715 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 146 [2023-11-23 21:29:08,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:08,716 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:29:08,716 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:29:08,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:29:08,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,729 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,730 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,737 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,750 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:29:08,751 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:29:08,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:29:08,752 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:29:08,753 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:08,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:08,789 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:29:08,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:29:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:29:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:29:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-11-23 21:29:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-11-23 21:29:08,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:29:08,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:29:08,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:29:08,831 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:29:08,899 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:29:08,902 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:29:09,308 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:29:09,609 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:29:09,609 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 21:29:09,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:09 BoogieIcfgContainer [2023-11-23 21:29:09,611 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:29:09,615 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:29:09,616 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:29:09,621 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:29:09,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:29:08" (1/3) ... [2023-11-23 21:29:09,622 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156d77b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:09, skipping insertion in model container [2023-11-23 21:29:09,623 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (2/3) ... [2023-11-23 21:29:09,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@156d77b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:09, skipping insertion in model container [2023-11-23 21:29:09,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:09" (3/3) ... [2023-11-23 21:29:09,626 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2023-11-23 21:29:09,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:29:09,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:29:09,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:29:09,703 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;@2974aa53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:29:09,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:29:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:29:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:29:09,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:09,723 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:09,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:09,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1127367989, now seen corresponding path program 1 times [2023-11-23 21:29:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624449468] [2023-11-23 21:29:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:09,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:29:10,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:10,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624449468] [2023-11-23 21:29:10,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624449468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:10,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678981177] [2023-11-23 21:29:10,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:10,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:10,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:10,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:10,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:29:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:10,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:29:10,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:29:10,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678981177] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:10,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:29:10,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:29:10,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551774650] [2023-11-23 21:29:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:10,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:29:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:10,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:29:10,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:10,594 INFO L87 Difference]: Start difference. First operand has 39 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 32 states have internal predecessors, (47), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:10,765 INFO L93 Difference]: Finished difference Result 88 states and 138 transitions. [2023-11-23 21:29:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:29:10,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-11-23 21:29:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:10,783 INFO L225 Difference]: With dead ends: 88 [2023-11-23 21:29:10,783 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 21:29:10,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:10,793 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:10,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 21:29:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2023-11-23 21:29:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-23 21:29:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 54 transitions. [2023-11-23 21:29:10,838 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 54 transitions. Word has length 32 [2023-11-23 21:29:10,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:10,839 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 54 transitions. [2023-11-23 21:29:10,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 54 transitions. [2023-11-23 21:29:10,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:29:10,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:10,842 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:10,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:11,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 21:29:11,045 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:11,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:11,046 INFO L85 PathProgramCache]: Analyzing trace with hash 328092311, now seen corresponding path program 1 times [2023-11-23 21:29:11,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:11,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319263484] [2023-11-23 21:29:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:11,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:29:11,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319263484] [2023-11-23 21:29:11,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319263484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:11,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271222649] [2023-11-23 21:29:11,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:11,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:11,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:11,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:11,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:29:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:11,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:29:11,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:29:11,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:11,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271222649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:11,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:29:11,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:29:11,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976992463] [2023-11-23 21:29:11,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:11,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:29:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:11,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:29:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:11,411 INFO L87 Difference]: Start difference. First operand 39 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:11,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:11,531 INFO L93 Difference]: Finished difference Result 79 states and 112 transitions. [2023-11-23 21:29:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:29:11,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-23 21:29:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:11,536 INFO L225 Difference]: With dead ends: 79 [2023-11-23 21:29:11,536 INFO L226 Difference]: Without dead ends: 46 [2023-11-23 21:29:11,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:11,539 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:11,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-23 21:29:11,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-11-23 21:29:11,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 35 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 21:29:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2023-11-23 21:29:11,563 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 35 [2023-11-23 21:29:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:11,564 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2023-11-23 21:29:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2023-11-23 21:29:11,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:29:11,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:11,569 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:11,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:11,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 21:29:11,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:11,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:11,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1378750269, now seen corresponding path program 1 times [2023-11-23 21:29:11,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335596430] [2023-11-23 21:29:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:29:11,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:11,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335596430] [2023-11-23 21:29:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335596430] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889742667] [2023-11-23 21:29:11,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:11,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:11,940 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:11,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:29:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:12,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:29:12,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:12,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:29:12,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:12,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889742667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:12,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:29:12,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 21:29:12,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502465402] [2023-11-23 21:29:12,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:12,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:29:12,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:12,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:29:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:29:12,130 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:12,297 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2023-11-23 21:29:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:12,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-11-23 21:29:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:12,300 INFO L225 Difference]: With dead ends: 88 [2023-11-23 21:29:12,301 INFO L226 Difference]: Without dead ends: 51 [2023-11-23 21:29:12,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:29:12,303 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:12,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 102 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-23 21:29:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-11-23 21:29:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.394736842105263) internal successors, (53), 39 states have internal predecessors, (53), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 21:29:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2023-11-23 21:29:12,312 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 36 [2023-11-23 21:29:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:12,313 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2023-11-23 21:29:12,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2023-11-23 21:29:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 21:29:12,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:12,315 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:12,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:12,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:12,537 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:12,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1641755247, now seen corresponding path program 1 times [2023-11-23 21:29:12,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:12,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126555984] [2023-11-23 21:29:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:12,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:29:13,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:13,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126555984] [2023-11-23 21:29:13,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126555984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:13,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146560396] [2023-11-23 21:29:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:13,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:13,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:13,105 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:13,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:29:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:13,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:29:13,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:29:13,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:29:13,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146560396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:13,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1317021903] [2023-11-23 21:29:13,905 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-11-23 21:29:13,905 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:13,909 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:13,915 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:13,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:14,718 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 76 for LOIs [2023-11-23 21:29:14,881 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:29:14,983 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:17,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1083#(and (= (select |#length| 3) 12) (<= 1 |#StackHeapBarrier|) (= 22 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= |__VERIFIER_assert_#in~cond| 0) (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_mulflt_~a#1_22| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| Int) (|v_ULTIMATE.start_mulflt_~b#1_28| Int) (|v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_mulflt_~tmp~1#1_23| Int)) (and (<= 1 (mod |v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_7| 4294967296)) (= (mod |v_ULTIMATE.start_mulflt_~b#1_28| 4294967296) 0) (= |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_mulflt_~a#1_22|) (= |v_ULTIMATE.start_mulflt_~tmp~1#1_23| |v_ULTIMATE.start_mulflt_~b#1_28|) (= |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| |v_ULTIMATE.start_mulflt_~tmp~1#1_23|) (= (mod |v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_7| 4294967296) (mod |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1| 4294967296)))) (= __VERIFIER_assert_~cond 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= (select (select |#memory_int| 1) 0) 48) (= (select (select |#memory_int| 1) 1) 0))' at error location [2023-11-23 21:29:17,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:17,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:29:17,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 23 [2023-11-23 21:29:17,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488728136] [2023-11-23 21:29:17,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:17,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-23 21:29:17,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-23 21:29:17,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2023-11-23 21:29:17,527 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 23 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-23 21:29:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:17,767 INFO L93 Difference]: Finished difference Result 58 states and 79 transitions. [2023-11-23 21:29:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:29:17,768 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 37 [2023-11-23 21:29:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:17,769 INFO L225 Difference]: With dead ends: 58 [2023-11-23 21:29:17,769 INFO L226 Difference]: Without dead ends: 51 [2023-11-23 21:29:17,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2023-11-23 21:29:17,771 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 47 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:17,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 495 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:29:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-23 21:29:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-11-23 21:29:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 39 states have internal predecessors, (51), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 21:29:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2023-11-23 21:29:17,780 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 37 [2023-11-23 21:29:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:17,781 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2023-11-23 21:29:17,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-23 21:29:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2023-11-23 21:29:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:29:17,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:17,783 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:17,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:17,990 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:17,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash 313956438, now seen corresponding path program 1 times [2023-11-23 21:29:17,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:17,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975152037] [2023-11-23 21:29:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:17,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 21:29:18,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:18,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975152037] [2023-11-23 21:29:18,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975152037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:18,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:18,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:29:18,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055090317] [2023-11-23 21:29:18,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:18,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:29:18,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:18,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:29:18,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:29:18,343 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:18,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:18,449 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2023-11-23 21:29:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:29:18,450 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-23 21:29:18,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:18,451 INFO L225 Difference]: With dead ends: 79 [2023-11-23 21:29:18,452 INFO L226 Difference]: Without dead ends: 64 [2023-11-23 21:29:18,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-23 21:29:18,453 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:18,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 239 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-23 21:29:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2023-11-23 21:29:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 44 states have internal predecessors, (54), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2023-11-23 21:29:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2023-11-23 21:29:18,464 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 38 [2023-11-23 21:29:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:18,464 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2023-11-23 21:29:18,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2023-11-23 21:29:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 21:29:18,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:18,466 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:18,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:29:18,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:18,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 290048136, now seen corresponding path program 1 times [2023-11-23 21:29:18,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:18,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770930612] [2023-11-23 21:29:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:18,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:29:18,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:18,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770930612] [2023-11-23 21:29:18,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770930612] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:18,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908875627] [2023-11-23 21:29:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:18,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:18,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:18,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:18,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:29:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:18,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:29:18,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:29:18,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:29:19,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908875627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:19,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896151071] [2023-11-23 21:29:19,161 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 21:29:19,162 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:19,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:19,163 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:19,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:19,604 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:19,631 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:20,062 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:20,176 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-11-23 21:29:20,193 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:29:20,293 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:21,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1669#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_8| Int)) (<= (mod |v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_8| 4294967296) 4294967294)) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-11-23 21:29:21,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:21,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:29:21,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 14 [2023-11-23 21:29:21,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094640912] [2023-11-23 21:29:21,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:21,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:29:21,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:21,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:29:21,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2023-11-23 21:29:21,726 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 21:29:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:22,142 INFO L93 Difference]: Finished difference Result 112 states and 162 transitions. [2023-11-23 21:29:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:29:22,144 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 42 [2023-11-23 21:29:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:22,146 INFO L225 Difference]: With dead ends: 112 [2023-11-23 21:29:22,146 INFO L226 Difference]: Without dead ends: 61 [2023-11-23 21:29:22,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:29:22,148 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:22,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 190 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:29:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-23 21:29:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-11-23 21:29:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 41 states have internal predecessors, (50), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:29:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2023-11-23 21:29:22,169 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 42 [2023-11-23 21:29:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:22,169 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2023-11-23 21:29:22,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-23 21:29:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2023-11-23 21:29:22,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:29:22,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:22,171 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:22,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:22,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:22,371 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:22,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:22,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1862610258, now seen corresponding path program 1 times [2023-11-23 21:29:22,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:22,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751438905] [2023-11-23 21:29:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:22,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:29:22,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:22,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751438905] [2023-11-23 21:29:22,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751438905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:22,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856099105] [2023-11-23 21:29:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:22,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:22,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:22,490 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:22,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:29:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:22,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:29:22,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:29:22,637 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:22,726 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:29:22,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856099105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:22,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259263218] [2023-11-23 21:29:22,732 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 21:29:22,733 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:22,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:22,733 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:22,734 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:23,114 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:23,130 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:23,452 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:23,523 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-11-23 21:29:23,539 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:29:23,673 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:24,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2165#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_9| Int)) (<= (mod |v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_9| 4294967296) 4294967294)))' at error location [2023-11-23 21:29:24,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:24,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:29:24,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-23 21:29:24,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540726943] [2023-11-23 21:29:24,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:24,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:29:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:29:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:29:24,750 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:29:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:25,026 INFO L93 Difference]: Finished difference Result 121 states and 166 transitions. [2023-11-23 21:29:25,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 21:29:25,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 43 [2023-11-23 21:29:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:25,028 INFO L225 Difference]: With dead ends: 121 [2023-11-23 21:29:25,028 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 21:29:25,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 21:29:25,034 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:25,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 143 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:29:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 21:29:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2023-11-23 21:29:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 49 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 21:29:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2023-11-23 21:29:25,045 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 43 [2023-11-23 21:29:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:25,045 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2023-11-23 21:29:25,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:29:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2023-11-23 21:29:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:29:25,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:25,047 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:25,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:25,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:29:25,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:25,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -776433000, now seen corresponding path program 1 times [2023-11-23 21:29:25,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:25,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264481117] [2023-11-23 21:29:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:29:25,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:25,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264481117] [2023-11-23 21:29:25,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264481117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:25,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78610366] [2023-11-23 21:29:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:25,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:25,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:25,590 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:25,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:29:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:25,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 21:29:25,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 21:29:25,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-23 21:29:26,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78610366] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:26,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:29:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 18 [2023-11-23 21:29:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070772645] [2023-11-23 21:29:26,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:26,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:29:26,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:26,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:29:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:29:26,060 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:29:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:26,155 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2023-11-23 21:29:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:29:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2023-11-23 21:29:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:26,157 INFO L225 Difference]: With dead ends: 72 [2023-11-23 21:29:26,157 INFO L226 Difference]: Without dead ends: 55 [2023-11-23 21:29:26,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:29:26,158 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:26,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 195 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:29:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-23 21:29:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-23 21:29:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 21:29:26,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2023-11-23 21:29:26,166 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 45 [2023-11-23 21:29:26,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:26,166 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2023-11-23 21:29:26,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:29:26,167 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2023-11-23 21:29:26,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 21:29:26,168 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:26,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:26,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:26,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:29:26,375 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:26,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash 778097098, now seen corresponding path program 2 times [2023-11-23 21:29:26,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:26,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968943253] [2023-11-23 21:29:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:26,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:29:26,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:26,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968943253] [2023-11-23 21:29:26,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968943253] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:26,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394787226] [2023-11-23 21:29:26,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:29:26,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:26,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:26,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:26,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:29:27,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-23 21:29:27,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:29:27,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:29:27,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 21:29:27,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-11-23 21:29:27,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394787226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:27,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [325941920] [2023-11-23 21:29:27,539 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-11-23 21:29:27,539 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:27,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:27,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:27,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:29:27,877 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:27,892 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:28,182 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2023-11-23 21:29:28,261 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-11-23 21:29:28,276 INFO L197 IcfgInterpreter]: Interpreting procedure base2flt with input of size 11 for LOIs [2023-11-23 21:29:28,405 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:29:29,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3160#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_20| Int)) (<= (mod |v_ULTIMATE.start_main_~zero~0#1_BEFORE_CALL_20| 4294967296) 4294967294)))' at error location [2023-11-23 21:29:29,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:29:29,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:29:29,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 10] total 21 [2023-11-23 21:29:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432351369] [2023-11-23 21:29:29,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:29,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 21:29:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:29,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 21:29:29,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 21:29:29,741 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-23 21:29:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:30,303 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2023-11-23 21:29:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 21:29:30,304 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 49 [2023-11-23 21:29:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:30,304 INFO L225 Difference]: With dead ends: 110 [2023-11-23 21:29:30,304 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 21:29:30,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2023-11-23 21:29:30,307 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:30,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 283 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:29:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 21:29:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 21:29:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-11-23 21:29:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 21:29:30,309 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2023-11-23 21:29:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:30,309 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 21:29:30,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-11-23 21:29:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 21:29:30,310 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 21:29:30,313 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:29:30,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 21:29:30,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:29:30,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-23 21:29:30,642 INFO L895 garLoopResultBuilder]: At program point L57-2(lines 57 72) the Hoare annotation is: (and (let ((.cse0 (<= |base2flt_#in~e| base2flt_~e)) (.cse1 (not (= |base2flt_#in~m| 1)))) (or (and (= base2flt_~m |base2flt_#in~m|) .cse0 .cse1) (and .cse0 (<= 0 (div base2flt_~m 4294967296)) .cse1))) (< 0 (mod |base2flt_#in~m| 4294967296))) [2023-11-23 21:29:30,642 INFO L899 garLoopResultBuilder]: For program point $Ultimate##27(line 76) no Hoare annotation was computed. [2023-11-23 21:29:30,642 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 34) no Hoare annotation was computed. [2023-11-23 21:29:30,643 INFO L899 garLoopResultBuilder]: For program point L58(lines 57 72) no Hoare annotation was computed. [2023-11-23 21:29:30,643 INFO L899 garLoopResultBuilder]: For program point L79(lines 28 81) no Hoare annotation was computed. [2023-11-23 21:29:30,643 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 82) the Hoare annotation is: true [2023-11-23 21:29:30,643 INFO L899 garLoopResultBuilder]: For program point L38(lines 37 52) no Hoare annotation was computed. [2023-11-23 21:29:30,643 INFO L899 garLoopResultBuilder]: For program point L59(lines 57 72) no Hoare annotation was computed. [2023-11-23 21:29:30,644 INFO L899 garLoopResultBuilder]: For program point base2fltEXIT(lines 24 82) no Hoare annotation was computed. [2023-11-23 21:29:30,644 INFO L899 garLoopResultBuilder]: For program point L47(lines 47 51) no Hoare annotation was computed. [2023-11-23 21:29:30,644 INFO L895 garLoopResultBuilder]: At program point L47-1(lines 37 52) the Hoare annotation is: (< 0 (mod |base2flt_#in~m| 4294967296)) [2023-11-23 21:29:30,644 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 75) no Hoare annotation was computed. [2023-11-23 21:29:30,644 INFO L899 garLoopResultBuilder]: For program point L185(lines 185 190) no Hoare annotation was computed. [2023-11-23 21:29:30,644 INFO L899 garLoopResultBuilder]: For program point L194(lines 194 211) no Hoare annotation was computed. [2023-11-23 21:29:30,644 INFO L899 garLoopResultBuilder]: For program point L194-2(lines 194 211) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point L203(lines 203 208) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point L179(lines 179 184) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L902 garLoopResultBuilder]: At program point L238(line 238) the Hoare annotation is: true [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point L238-1(line 238) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L895 garLoopResultBuilder]: At program point L239(line 239) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point L239-1(line 239) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point L256(lines 256 272) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L899 garLoopResultBuilder]: For program point L256-1(lines 256 272) no Hoare annotation was computed. [2023-11-23 21:29:30,645 INFO L895 garLoopResultBuilder]: At program point L240(line 240) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point L240-1(line 240) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L895 garLoopResultBuilder]: At program point L257-2(lines 257 266) the Hoare annotation is: (and (or (= |ULTIMATE.start_main_~sb~0#1| 0) (= |ULTIMATE.start_main_~sb~0#1| 1)) (= |ULTIMATE.start_main_~zero~0#1| 0) (= 0 |ULTIMATE.start_main_~tmp___1~0#1|) (= |ULTIMATE.start_main_~r_mul~0#1| 0)) [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point L158-2(lines 157 218) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point L216(lines 157 218) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L895 garLoopResultBuilder]: At program point L241(line 241) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point L241-1(line 241) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 20) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 20) no Hoare annotation was computed. [2023-11-23 21:29:30,646 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 15 20) the Hoare annotation is: true [2023-11-23 21:29:30,647 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-11-23 21:29:30,649 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:30,651 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:29:30,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:29:30 BoogieIcfgContainer [2023-11-23 21:29:30,665 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:29:30,665 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:29:30,665 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:29:30,666 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:29:30,666 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:09" (3/4) ... [2023-11-23 21:29:30,668 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 21:29:30,672 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2023-11-23 21:29:30,673 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-11-23 21:29:30,685 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 47 nodes and edges [2023-11-23 21:29:30,686 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2023-11-23 21:29:30,687 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-23 21:29:30,687 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-23 21:29:30,725 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 < (\old(m) % 4294967296)) [2023-11-23 21:29:30,725 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((m == \old(m)) && (\old(e) <= e)) && !((\old(m) == 1))) || (((\old(e) <= e) && (0 <= (m / 4294967296))) && !((\old(m) == 1)))) && (0 < (\old(m) % 4294967296))) [2023-11-23 21:29:30,767 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (0 < (\old(m) % 4294967296)) [2023-11-23 21:29:30,767 WARN L141 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((m == \old(m)) && (\old(e) <= e)) && !((\old(m) == 1))) || (((\old(e) <= e) && (0 <= (m / 4294967296))) && !((\old(m) == 1)))) && (0 < (\old(m) % 4294967296))) [2023-11-23 21:29:30,825 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 21:29:30,825 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/witness.yml [2023-11-23 21:29:30,826 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:29:30,826 INFO L158 Benchmark]: Toolchain (without parser) took 22523.53ms. Allocated memory was 130.0MB in the beginning and 293.6MB in the end (delta: 163.6MB). Free memory was 98.7MB in the beginning and 167.1MB in the end (delta: -68.4MB). Peak memory consumption was 97.1MB. Max. memory is 16.1GB. [2023-11-23 21:29:30,827 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:29:30,827 INFO L158 Benchmark]: CACSL2BoogieTranslator took 364.46ms. Allocated memory is still 130.0MB. Free memory was 98.7MB in the beginning and 85.1MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:29:30,828 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.69ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 83.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:29:30,828 INFO L158 Benchmark]: Boogie Preprocessor took 34.32ms. Allocated memory is still 130.0MB. Free memory was 83.2MB in the beginning and 81.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:29:30,829 INFO L158 Benchmark]: RCFGBuilder took 861.20ms. Allocated memory was 130.0MB in the beginning and 167.8MB in the end (delta: 37.7MB). Free memory was 81.5MB in the beginning and 124.9MB in the end (delta: -43.4MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. [2023-11-23 21:29:30,830 INFO L158 Benchmark]: TraceAbstraction took 21049.48ms. Allocated memory was 167.8MB in the beginning and 293.6MB in the end (delta: 125.8MB). Free memory was 124.9MB in the beginning and 174.5MB in the end (delta: -49.6MB). Peak memory consumption was 76.3MB. Max. memory is 16.1GB. [2023-11-23 21:29:30,831 INFO L158 Benchmark]: Witness Printer took 160.37ms. Allocated memory is still 293.6MB. Free memory was 174.5MB in the beginning and 167.1MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-23 21:29:30,834 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 94.4MB. Free memory is still 40.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 364.46ms. Allocated memory is still 130.0MB. Free memory was 98.7MB in the beginning and 85.1MB in the end (delta: 13.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.69ms. Allocated memory is still 130.0MB. Free memory was 85.1MB in the beginning and 83.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.32ms. Allocated memory is still 130.0MB. Free memory was 83.2MB in the beginning and 81.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 861.20ms. Allocated memory was 130.0MB in the beginning and 167.8MB in the end (delta: 37.7MB). Free memory was 81.5MB in the beginning and 124.9MB in the end (delta: -43.4MB). Peak memory consumption was 33.4MB. Max. memory is 16.1GB. * TraceAbstraction took 21049.48ms. Allocated memory was 167.8MB in the beginning and 293.6MB in the end (delta: 125.8MB). Free memory was 124.9MB in the beginning and 174.5MB in the end (delta: -49.6MB). Peak memory consumption was 76.3MB. Max. memory is 16.1GB. * Witness Printer took 160.37ms. Allocated memory is still 293.6MB. Free memory was 174.5MB in the beginning and 167.1MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. 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 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.0s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 278 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 277 mSDsluCounter, 1816 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1524 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1306 IncrementalHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 292 mSDtfsCounter, 1306 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 791 GetRequests, 593 SyntacticMatches, 3 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=7, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 63 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 71 PreInvPairs, 99 NumberOfFragments, 65 HoareAnnotationTreeSize, 71 FomulaSimplifications, 548 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 111 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 676 NumberOfCodeBlocks, 673 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 870 ConstructedInterpolants, 0 QuantifiedInterpolants, 1798 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1150 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 22 InterpolantComputations, 5 PerfectInterpolantSequences, 483/591 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (0 < (\old(m) % 4294967296)) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((((m == \old(m)) && (\old(e) <= e)) && !((\old(m) == 1))) || (((\old(e) <= e) && (0 <= (m / 4294967296))) && !((\old(m) == 1)))) && (0 < (\old(m) % 4294967296))) RESULT: Ultimate proved your program to be correct! [2023-11-23 21:29:30,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3bf169-adb9-4d45-a624-1732373039ab/bin/utaipan-verify-mE87zJ7Ire/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 Writing output log to file Ultimate.log Result: TRUE