./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c1619194307da84227512f62eb582bffd66266544ce804bd80ee6a40fe157ac7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:03:01,128 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:03:01,254 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 21:03:01,264 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:03:01,265 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:03:01,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:03:01,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:03:01,306 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:03:01,308 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:03:01,315 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:03:01,316 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:03:01,316 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:03:01,317 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:03:01,319 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:03:01,319 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:03:01,320 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:03:01,320 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:03:01,321 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:03:01,321 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:03:01,322 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:03:01,322 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:03:01,323 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:03:01,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:03:01,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 21:03:01,325 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:03:01,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:03:01,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:03:01,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:03:01,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 21:03:01,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:03:01,329 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 21:03:01,329 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:03:01,329 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 21:03:01,330 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:03:01,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:03:01,330 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:03:01,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:03:01,331 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:03:01,331 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:03:01,331 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 21:03:01,332 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:03:01,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:03:01,332 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 21:03:01,333 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:03:01,333 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:03:01,334 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_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1619194307da84227512f62eb582bffd66266544ce804bd80ee6a40fe157ac7 [2023-11-06 21:03:01,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:03:01,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:03:01,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:03:01,704 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:03:01,704 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:03:01,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/float-benchs/zonotope_3.c [2023-11-06 21:03:04,938 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:03:05,227 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:03:05,228 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/sv-benchmarks/c/float-benchs/zonotope_3.c [2023-11-06 21:03:05,236 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/data/d3eeaf17d/5d085c0243ae4667b71332a0b57c62a3/FLAG5a353abc0 [2023-11-06 21:03:05,251 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/data/d3eeaf17d/5d085c0243ae4667b71332a0b57c62a3 [2023-11-06 21:03:05,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:03:05,256 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:03:05,257 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:03:05,257 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:03:05,263 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:03:05,264 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,265 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477f5835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05, skipping insertion in model container [2023-11-06 21:03:05,265 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,294 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:03:05,461 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_a60b074f-d177-4991-a10c-719a697f383c/sv-benchmarks/c/float-benchs/zonotope_3.c[604,617] [2023-11-06 21:03:05,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:03:05,489 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:03:05,503 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_a60b074f-d177-4991-a10c-719a697f383c/sv-benchmarks/c/float-benchs/zonotope_3.c[604,617] [2023-11-06 21:03:05,509 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:03:05,524 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:03:05,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05 WrapperNode [2023-11-06 21:03:05,524 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:03:05,525 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:03:05,525 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:03:05,526 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:03:05,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,556 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2023-11-06 21:03:05,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:03:05,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:03:05,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:03:05,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:03:05,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,573 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,575 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,578 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:03:05,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:03:05,579 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:03:05,579 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:03:05,580 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (1/1) ... [2023-11-06 21:03:05,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:03:05,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:03:05,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:03:05,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:03:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 21:03:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-11-06 21:03:05,659 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-11-06 21:03:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure g [2023-11-06 21:03:05,659 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2023-11-06 21:03:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 21:03:05,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:03:05,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:03:05,731 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:03:05,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:03:05,894 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:03:05,940 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:03:05,940 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:03:05,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:03:05 BoogieIcfgContainer [2023-11-06 21:03:05,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:03:05,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:03:05,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:03:05,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:03:05,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:03:05" (1/3) ... [2023-11-06 21:03:05,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@877b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:03:05, skipping insertion in model container [2023-11-06 21:03:05,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:03:05" (2/3) ... [2023-11-06 21:03:05,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@877b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:03:05, skipping insertion in model container [2023-11-06 21:03:05,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:03:05" (3/3) ... [2023-11-06 21:03:05,954 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c [2023-11-06 21:03:05,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:03:05,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 21:03:06,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:03:06,027 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@291625b3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:03:06,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 21:03:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 21:03:06,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 21:03:06,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:06,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:03:06,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:03:06,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -377860736, now seen corresponding path program 1 times [2023-11-06 21:03:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:06,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539725128] [2023-11-06 21:03:06,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:06,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 21:03:06,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:06,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539725128] [2023-11-06 21:03:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539725128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:03:06,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:03:06,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 21:03:06,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818362748] [2023-11-06 21:03:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:03:06,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:03:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:03:06,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:03:06,349 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 21:03:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:06,447 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-11-06 21:03:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:03:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2023-11-06 21:03:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:06,462 INFO L225 Difference]: With dead ends: 41 [2023-11-06 21:03:06,463 INFO L226 Difference]: Without dead ends: 34 [2023-11-06 21:03:06,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:03:06,476 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:06,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:06,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-06 21:03:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-11-06 21:03:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 21:03:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-06 21:03:06,541 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2023-11-06 21:03:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:06,542 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-06 21:03:06,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-06 21:03:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-06 21:03:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 21:03:06,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:06,546 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-11-06 21:03:06,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:03:06,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:03:06,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash 647802699, now seen corresponding path program 1 times [2023-11-06 21:03:06,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:06,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400748276] [2023-11-06 21:03:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:06,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 21:03:06,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:06,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400748276] [2023-11-06 21:03:06,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400748276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:03:06,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562664810] [2023-11-06 21:03:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:06,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:06,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:03:06,808 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:03:06,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:03:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:06,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 21:03:06,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:03:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 21:03:07,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:03:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 21:03:07,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562664810] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:03:07,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058786503] [2023-11-06 21:03:07,257 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-06 21:03:07,257 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:03:07,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:03:07,269 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:03:07,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:03:08,664 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 3 for LOIs [2023-11-06 21:03:08,666 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2023-11-06 21:03:08,667 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:03:08,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '353#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 100001 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-06 21:03:08,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:03:08,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:03:08,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 21:03:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874419335] [2023-11-06 21:03:08,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:03:08,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 21:03:08,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:08,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 21:03:08,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:03:08,876 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-06 21:03:08,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:08,973 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2023-11-06 21:03:08,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:03:08,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 37 [2023-11-06 21:03:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:08,976 INFO L225 Difference]: With dead ends: 56 [2023-11-06 21:03:08,976 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 21:03:08,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-06 21:03:08,980 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:08,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 105 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:08,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 21:03:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-06 21:03:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-06 21:03:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 71 transitions. [2023-11-06 21:03:09,007 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 71 transitions. Word has length 37 [2023-11-06 21:03:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:09,008 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 71 transitions. [2023-11-06 21:03:09,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-11-06 21:03:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 71 transitions. [2023-11-06 21:03:09,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-06 21:03:09,015 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:09,016 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:03:09,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:03:09,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-06 21:03:09,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:03:09,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:09,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1813992512, now seen corresponding path program 2 times [2023-11-06 21:03:09,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:09,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531618639] [2023-11-06 21:03:09,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:09,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-06 21:03:09,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:09,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531618639] [2023-11-06 21:03:09,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531618639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:03:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827381251] [2023-11-06 21:03:09,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:03:09,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:09,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:03:09,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:03:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:03:09,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-06 21:03:09,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:03:09,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 21:03:09,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:03:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-06 21:03:09,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:03:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-11-06 21:03:09,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827381251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:03:09,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1529630289] [2023-11-06 21:03:09,899 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-06 21:03:09,899 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:03:09,900 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:03:09,900 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:03:09,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:03:10,522 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 3 for LOIs [2023-11-06 21:03:10,524 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2023-11-06 21:03:10,525 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:03:10,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1059#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 100001 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-06 21:03:10,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:03:10,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:03:10,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-06 21:03:10,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856695651] [2023-11-06 21:03:10,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:03:10,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:03:10,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:03:10,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:03:10,749 INFO L87 Difference]: Start difference. First operand 53 states and 71 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-06 21:03:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:10,923 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2023-11-06 21:03:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:03:10,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 88 [2023-11-06 21:03:10,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:10,927 INFO L225 Difference]: With dead ends: 110 [2023-11-06 21:03:10,927 INFO L226 Difference]: Without dead ends: 107 [2023-11-06 21:03:10,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2023-11-06 21:03:10,929 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:10,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 106 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:03:10,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-06 21:03:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-06 21:03:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-06 21:03:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 149 transitions. [2023-11-06 21:03:10,955 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 149 transitions. Word has length 88 [2023-11-06 21:03:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:10,957 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 149 transitions. [2023-11-06 21:03:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-11-06 21:03:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 149 transitions. [2023-11-06 21:03:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-11-06 21:03:10,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:10,966 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:03:10,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 21:03:11,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:11,167 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:03:11,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:11,168 INFO L85 PathProgramCache]: Analyzing trace with hash 853412448, now seen corresponding path program 3 times [2023-11-06 21:03:11,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:11,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668510619] [2023-11-06 21:03:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:11,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-06 21:03:11,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668510619] [2023-11-06 21:03:11,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668510619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:03:11,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826933111] [2023-11-06 21:03:11,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 21:03:11,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:11,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:03:11,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:03:11,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:03:11,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 21:03:11,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:03:11,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 21:03:11,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:03:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-06 21:03:12,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:03:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1339 backedges. 0 proven. 415 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2023-11-06 21:03:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826933111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:03:12,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1921265867] [2023-11-06 21:03:12,651 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-06 21:03:12,651 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:03:12,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:03:12,652 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:03:12,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:03:13,192 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 3 for LOIs [2023-11-06 21:03:13,193 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2023-11-06 21:03:13,194 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:03:13,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2557#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 100001 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-06 21:03:13,446 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:03:13,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:03:13,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-06 21:03:13,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672729747] [2023-11-06 21:03:13,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:03:13,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 21:03:13,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:13,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 21:03:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:03:13,452 INFO L87 Difference]: Start difference. First operand 107 states and 149 transitions. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) [2023-11-06 21:03:13,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:13,780 INFO L93 Difference]: Finished difference Result 218 states and 319 transitions. [2023-11-06 21:03:13,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 21:03:13,781 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) Word has length 190 [2023-11-06 21:03:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:13,790 INFO L225 Difference]: With dead ends: 218 [2023-11-06 21:03:13,790 INFO L226 Difference]: Without dead ends: 215 [2023-11-06 21:03:13,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 21:03:13,795 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:13,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 176 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 21:03:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-06 21:03:13,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2023-11-06 21:03:13,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 92 states have call successors, (92), 2 states have call predecessors, (92), 2 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-06 21:03:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 305 transitions. [2023-11-06 21:03:13,856 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 305 transitions. Word has length 190 [2023-11-06 21:03:13,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:13,857 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 305 transitions. [2023-11-06 21:03:13,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 22 states have call successors, (88), 1 states have call predecessors, (88), 1 states have return successors, (88), 22 states have call predecessors, (88), 22 states have call successors, (88) [2023-11-06 21:03:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 305 transitions. [2023-11-06 21:03:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2023-11-06 21:03:13,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:13,876 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:03:13,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-06 21:03:14,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:14,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:03:14,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:14,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1979559584, now seen corresponding path program 4 times [2023-11-06 21:03:14,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:14,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852084657] [2023-11-06 21:03:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:14,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-06 21:03:15,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:15,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852084657] [2023-11-06 21:03:15,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852084657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:03:15,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435515702] [2023-11-06 21:03:15,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 21:03:15,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:15,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:03:15,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:03:15,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:03:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:15,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 21:03:15,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:03:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-06 21:03:16,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:03:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 2101 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-06 21:03:17,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435515702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:03:17,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1832444564] [2023-11-06 21:03:17,717 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-06 21:03:17,717 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:03:17,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:03:17,718 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:03:17,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:03:18,289 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 3 for LOIs [2023-11-06 21:03:18,291 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2023-11-06 21:03:18,292 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:03:18,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= 100001 |ULTIMATE.start_main_~i~0#1|))' at error location [2023-11-06 21:03:18,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:03:18,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:03:18,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-11-06 21:03:18,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959803652] [2023-11-06 21:03:18,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:03:18,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 21:03:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:03:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 21:03:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=1987, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 21:03:18,622 INFO L87 Difference]: Start difference. First operand 215 states and 305 transitions. Second operand has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) [2023-11-06 21:03:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:03:19,239 INFO L93 Difference]: Finished difference Result 434 states and 643 transitions. [2023-11-06 21:03:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 21:03:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) Word has length 394 [2023-11-06 21:03:19,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:03:19,250 INFO L225 Difference]: With dead ends: 434 [2023-11-06 21:03:19,251 INFO L226 Difference]: Without dead ends: 431 [2023-11-06 21:03:19,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1205 GetRequests, 1150 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1205, Invalid=1987, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 21:03:19,256 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 21:03:19,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 211 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 21:03:19,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-06 21:03:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2023-11-06 21:03:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 188 states have call successors, (188), 2 states have call predecessors, (188), 2 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-06 21:03:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 617 transitions. [2023-11-06 21:03:19,308 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 617 transitions. Word has length 394 [2023-11-06 21:03:19,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:03:19,314 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 617 transitions. [2023-11-06 21:03:19,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.857142857142857) internal successors, (238), 49 states have internal predecessors, (238), 46 states have call successors, (184), 1 states have call predecessors, (184), 1 states have return successors, (184), 46 states have call predecessors, (184), 46 states have call successors, (184) [2023-11-06 21:03:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 617 transitions. [2023-11-06 21:03:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2023-11-06 21:03:19,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:03:19,347 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 21:03:19,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:03:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:19,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 21:03:19,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:03:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1253955360, now seen corresponding path program 5 times [2023-11-06 21:03:19,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:03:19,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087634221] [2023-11-06 21:03:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:03:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:03:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:03:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2023-11-06 21:03:24,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:03:24,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087634221] [2023-11-06 21:03:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087634221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:03:24,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90767788] [2023-11-06 21:03:24,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:03:24,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:03:24,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:03:24,942 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:03:24,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60b074f-d177-4991-a10c-719a697f383c/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:03:25,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2023-11-06 21:03:25,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:03:25,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 1983 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-06 21:03:25,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:03:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2023-11-06 21:03:26,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:03:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26845 backedges. 0 proven. 9361 refuted. 0 times theorem prover too weak. 17484 trivial. 0 not checked. [2023-11-06 21:03:30,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90767788] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:03:30,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016130565] [2023-11-06 21:03:30,487 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-11-06 21:03:30,487 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:03:30,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:03:30,488 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:03:30,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:03:31,000 INFO L197 IcfgInterpreter]: Interpreting procedure g with input of size 3 for LOIs [2023-11-06 21:03:31,001 INFO L197 IcfgInterpreter]: Interpreting procedure f with input of size 3 for LOIs [2023-11-06 21:03:31,002 INFO L180 IcfgInterpreter]: Interpretation finished