./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS --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 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:08:14,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:08:14,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:08:14,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:08:14,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:08:14,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:08:14,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:08:14,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:08:14,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:08:14,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:08:14,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:08:14,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:08:14,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:08:14,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:08:14,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:08:14,416 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:08:14,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:08:14,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:08:14,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:08:14,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:08:14,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:08:14,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:08:14,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:08:14,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:08:14,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:08:14,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:08:14,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:08:14,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:08:14,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:08:14,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:08:14,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:08:14,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:08:14,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:08:14,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:08:14,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:08:14,461 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:08:14,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:08:14,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:08:14,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:08:14,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:08:14,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:08:14,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:08:14,504 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:08:14,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:08:14,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:08:14,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:08:14,506 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:08:14,507 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:08:14,507 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:08:14,507 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:08:14,507 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:08:14,508 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:08:14,509 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:08:14,509 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:08:14,509 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:08:14,509 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:08:14,510 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:08:14,510 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:08:14,510 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:08:14,510 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:08:14,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:08:14,511 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:08:14,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:08:14,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:08:14,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:08:14,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:08:14,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:08:14,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:08:14,513 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:08:14,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:08:14,514 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:08:14,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:08:14,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:08:14,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:08:14,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:08:14,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:08:14,515 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:08:14,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:08:14,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:08:14,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:08:14,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:08:14,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:08:14,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:08:14,517 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8a7308dc5f86f1f4eda090a45a8f84359680ddfad7d17e2c5273bd494b2cbe5e [2022-11-19 08:08:14,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:08:14,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:08:14,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:08:14,864 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:08:14,865 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:08:14,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-11-19 08:08:14,938 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/data/32854d609/f0e51c86bf4742c29527fec8cb34ab4c/FLAGf080304d5 [2022-11-19 08:08:15,436 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:08:15,436 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c [2022-11-19 08:08:15,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/data/32854d609/f0e51c86bf4742c29527fec8cb34ab4c/FLAGf080304d5 [2022-11-19 08:08:15,789 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/data/32854d609/f0e51c86bf4742c29527fec8cb34ab4c [2022-11-19 08:08:15,791 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:08:15,792 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:08:15,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:08:15,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:08:15,802 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:08:15,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:08:15" (1/1) ... [2022-11-19 08:08:15,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56476645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:15, skipping insertion in model container [2022-11-19 08:08:15,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:08:15" (1/1) ... [2022-11-19 08:08:15,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:08:15,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:08:16,156 WARN L234 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_ffa7c40c-2982-4415-bb36-82d4d61e71ef/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-11-19 08:08:16,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:08:16,177 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:08:16,230 WARN L234 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_ffa7c40c-2982-4415-bb36-82d4d61e71ef/sv-benchmarks/c/float-benchs/zonotope_3.c.v+lhb-reducer.c[12131,12144] [2022-11-19 08:08:16,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:08:16,251 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:08:16,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16 WrapperNode [2022-11-19 08:08:16,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:08:16,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:08:16,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:08:16,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:08:16,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,313 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 548 [2022-11-19 08:08:16,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:08:16,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:08:16,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:08:16,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:08:16,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,343 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:08:16,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:08:16,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:08:16,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:08:16,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (1/1) ... [2022-11-19 08:08:16,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:08:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:16,391 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:08:16,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:08:16,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:08:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:08:16,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:08:16,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:08:16,548 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:08:16,550 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:08:17,073 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:08:17,104 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:08:17,104 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 08:08:17,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:08:17 BoogieIcfgContainer [2022-11-19 08:08:17,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:08:17,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:08:17,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:08:17,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:08:17,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:08:15" (1/3) ... [2022-11-19 08:08:17,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257632de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:08:17, skipping insertion in model container [2022-11-19 08:08:17,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:08:16" (2/3) ... [2022-11-19 08:08:17,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@257632de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:08:17, skipping insertion in model container [2022-11-19 08:08:17,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:08:17" (3/3) ... [2022-11-19 08:08:17,121 INFO L112 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.v+lhb-reducer.c [2022-11-19 08:08:17,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:08:17,142 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:08:17,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:08:17,202 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;@300bd39c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:08:17,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:08:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 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) [2022-11-19 08:08:17,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 08:08:17,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:17,215 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:17,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:17,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1601611879, now seen corresponding path program 1 times [2022-11-19 08:08:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941859651] [2022-11-19 08:08:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:17,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941859651] [2022-11-19 08:08:17,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941859651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:17,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:17,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:08:17,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317806651] [2022-11-19 08:08:17,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:17,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:08:17,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:08:17,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:08:17,814 INFO L87 Difference]: Start difference. First operand has 52 states, 50 states have (on average 1.88) internal successors, (94), 51 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2022-11-19 08:08:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:17,939 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2022-11-19 08:08:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:08:17,942 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-19 08:08:17,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:17,951 INFO L225 Difference]: With dead ends: 64 [2022-11-19 08:08:17,951 INFO L226 Difference]: Without dead ends: 50 [2022-11-19 08:08:17,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:08:17,960 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 93 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:17,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 262 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:08:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-19 08:08:18,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-19 08:08:18,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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) [2022-11-19 08:08:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-11-19 08:08:18,005 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2022-11-19 08:08:18,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:18,006 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-11-19 08:08:18,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2022-11-19 08:08:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-11-19 08:08:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 08:08:18,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:18,008 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:08:18,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:18,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1584601218, now seen corresponding path program 1 times [2022-11-19 08:08:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:18,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18757430] [2022-11-19 08:08:18,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:18,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:18,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:18,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18757430] [2022-11-19 08:08:18,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18757430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:18,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:18,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 08:08:18,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126647507] [2022-11-19 08:08:18,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:18,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:08:18,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:18,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:08:18,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:08:18,364 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 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) [2022-11-19 08:08:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:18,470 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-11-19 08:08:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:08:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-19 08:08:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:18,473 INFO L225 Difference]: With dead ends: 63 [2022-11-19 08:08:18,473 INFO L226 Difference]: Without dead ends: 56 [2022-11-19 08:08:18,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:08:18,475 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:18,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:08:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-19 08:08:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-11-19 08:08:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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) [2022-11-19 08:08:18,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-19 08:08:18,483 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2022-11-19 08:08:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:18,483 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-19 08:08:18,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 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) [2022-11-19 08:08:18,484 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-19 08:08:18,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:08:18,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:18,486 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:18,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:08:18,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash 902581852, now seen corresponding path program 1 times [2022-11-19 08:08:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:18,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897550884] [2022-11-19 08:08:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:18,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897550884] [2022-11-19 08:08:18,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897550884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:08:18,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:08:18,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:08:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647552084] [2022-11-19 08:08:18,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:08:18,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:08:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:18,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:08:18,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:08:18,583 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-11-19 08:08:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:18,602 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-11-19 08:08:18,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:08:18,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-19 08:08:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:18,604 INFO L225 Difference]: With dead ends: 66 [2022-11-19 08:08:18,604 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 08:08:18,605 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 [2022-11-19 08:08:18,606 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:18,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:08:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 08:08:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-19 08:08:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 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) [2022-11-19 08:08:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-19 08:08:18,613 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2022-11-19 08:08:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:18,613 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-19 08:08:18,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2022-11-19 08:08:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-19 08:08:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:08:18,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:18,615 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:08:18,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:18,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash 449992577, now seen corresponding path program 1 times [2022-11-19 08:08:18,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:18,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586837091] [2022-11-19 08:08:18,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:18,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:18,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:18,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586837091] [2022-11-19 08:08:18,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586837091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:18,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737456583] [2022-11-19 08:08:18,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:18,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:18,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:18,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:18,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:08:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:08:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:19,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:19,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737456583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:19,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445222898] [2022-11-19 08:08:19,692 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:08:19,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:08:19,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:08:19,702 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:08:19,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:08:24,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:08:43,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '789#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:08:43,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:08:43,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:08:43,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 08:08:43,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676342116] [2022-11-19 08:08:43,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:08:43,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 08:08:43,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:08:43,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 08:08:43,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=872, Invalid=2550, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:08:43,620 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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) [2022-11-19 08:08:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:08:43,779 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-11-19 08:08:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:08:43,779 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-19 08:08:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:08:43,781 INFO L225 Difference]: With dead ends: 118 [2022-11-19 08:08:43,781 INFO L226 Difference]: Without dead ends: 111 [2022-11-19 08:08:43,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2047 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=872, Invalid=2550, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:08:43,783 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:08:43,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 127 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:08:43,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-19 08:08:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-19 08:08:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 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) [2022-11-19 08:08:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-11-19 08:08:43,794 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 49 [2022-11-19 08:08:43,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:08:43,794 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-11-19 08:08:43,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.92) internal successors, (98), 24 states have internal predecessors, (98), 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) [2022-11-19 08:08:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-11-19 08:08:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 08:08:43,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:08:43,796 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:08:43,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:08:44,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:44,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:08:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:08:44,003 INFO L85 PathProgramCache]: Analyzing trace with hash -844379071, now seen corresponding path program 2 times [2022-11-19 08:08:44,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:08:44,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583231463] [2022-11-19 08:08:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:08:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:08:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:08:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:44,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:08:44,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583231463] [2022-11-19 08:08:44,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583231463] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:08:44,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745848808] [2022-11-19 08:08:44,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:08:44,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:08:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:08:44,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:08:44,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:08:45,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-19 08:08:45,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:08:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:08:45,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:08:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:45,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:08:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:08:46,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745848808] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:08:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [456708173] [2022-11-19 08:08:46,257 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:08:46,257 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:08:46,258 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:08:46,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:08:46,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:08:49,330 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:09:07,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1809#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:09:07,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:09:07,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:09:07,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-19 08:09:07,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628606600] [2022-11-19 08:09:07,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:07,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 08:09:07,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 08:09:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2372, Invalid=4434, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 08:09:08,000 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 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) [2022-11-19 08:09:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:08,285 INFO L93 Difference]: Finished difference Result 238 states and 263 transitions. [2022-11-19 08:09:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 08:09:08,286 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-11-19 08:09:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:08,288 INFO L225 Difference]: With dead ends: 238 [2022-11-19 08:09:08,288 INFO L226 Difference]: Without dead ends: 231 [2022-11-19 08:09:08,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3667 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=2372, Invalid=4434, Unknown=0, NotChecked=0, Total=6806 [2022-11-19 08:09:08,292 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 364 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:08,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 229 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:09:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-19 08:09:08,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-19 08:09:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 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) [2022-11-19 08:09:08,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2022-11-19 08:09:08,311 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 109 [2022-11-19 08:09:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:08,311 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2022-11-19 08:09:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.448979591836735) internal successors, (218), 48 states have internal predecessors, (218), 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) [2022-11-19 08:09:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2022-11-19 08:09:08,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-11-19 08:09:08,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:08,315 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:08,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:09:08,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:08,523 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:08,523 INFO L85 PathProgramCache]: Analyzing trace with hash -588917311, now seen corresponding path program 3 times [2022-11-19 08:09:08,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:08,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986430133] [2022-11-19 08:09:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:08,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:11,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:11,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986430133] [2022-11-19 08:09:11,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986430133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:11,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657193040] [2022-11-19 08:09:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:09:11,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:11,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:11,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:11,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:09:11,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:09:11,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:09:11,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 2018 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 08:09:11,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:12,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:09:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:15,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657193040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:09:15,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1103421765] [2022-11-19 08:09:15,305 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:09:15,305 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:09:15,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:09:15,306 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:09:15,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:09:18,583 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:09:37,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3933#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:09:37,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:09:37,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:09:37,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-19 08:09:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272071362] [2022-11-19 08:09:37,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:09:37,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-19 08:09:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:09:37,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-19 08:09:37,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7100, Invalid=9930, Unknown=0, NotChecked=0, Total=17030 [2022-11-19 08:09:37,856 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 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) [2022-11-19 08:09:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:09:38,550 INFO L93 Difference]: Finished difference Result 478 states and 527 transitions. [2022-11-19 08:09:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-19 08:09:38,555 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2022-11-19 08:09:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:09:38,563 INFO L225 Difference]: With dead ends: 478 [2022-11-19 08:09:38,563 INFO L226 Difference]: Without dead ends: 471 [2022-11-19 08:09:38,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 603 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6907 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=7100, Invalid=9930, Unknown=0, NotChecked=0, Total=17030 [2022-11-19 08:09:38,569 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 905 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:09:38,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 359 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:09:38,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-19 08:09:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2022-11-19 08:09:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.004255319148936) internal successors, (472), 470 states have internal predecessors, (472), 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) [2022-11-19 08:09:38,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 472 transitions. [2022-11-19 08:09:38,600 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 472 transitions. Word has length 229 [2022-11-19 08:09:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:09:38,601 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 472 transitions. [2022-11-19 08:09:38,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.721649484536083) internal successors, (458), 96 states have internal predecessors, (458), 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) [2022-11-19 08:09:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 472 transitions. [2022-11-19 08:09:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-11-19 08:09:38,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:09:38,610 INFO L195 NwaCegarLoop]: trace histogram [86, 85, 85, 85, 85, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:09:38,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:09:38,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:09:38,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:09:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:09:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1162450751, now seen corresponding path program 4 times [2022-11-19 08:09:38,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:09:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921176487] [2022-11-19 08:09:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:09:38,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:09:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:48,160 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:48,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:09:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921176487] [2022-11-19 08:09:48,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921176487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:09:48,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748648725] [2022-11-19 08:09:48,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:09:48,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:09:48,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:09:48,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:09:48,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:09:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:09:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 4034 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 08:09:49,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:09:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:09:49,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18020 backedges. 0 proven. 18020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:00,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748648725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:00,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736394325] [2022-11-19 08:10:00,962 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:10:00,962 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:10:00,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:10:00,963 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:10:00,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:10:04,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:10:24,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8265#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:10:24,483 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:10:24,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:10:24,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-19 08:10:24,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482117503] [2022-11-19 08:10:24,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:24,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-19 08:10:24,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:10:24,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-19 08:10:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23468, Invalid=27834, Unknown=0, NotChecked=0, Total=51302 [2022-11-19 08:10:24,495 INFO L87 Difference]: Start difference. First operand 471 states and 472 transitions. Second operand has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 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) [2022-11-19 08:10:26,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:10:26,942 INFO L93 Difference]: Finished difference Result 958 states and 1055 transitions. [2022-11-19 08:10:26,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-19 08:10:26,943 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 469 [2022-11-19 08:10:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:10:26,947 INFO L225 Difference]: With dead ends: 958 [2022-11-19 08:10:26,947 INFO L226 Difference]: Without dead ends: 951 [2022-11-19 08:10:26,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1501 GetRequests, 1275 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13387 ImplicationChecksByTransitivity, 34.5s TimeCoverageRelationStatistics Valid=23468, Invalid=27834, Unknown=0, NotChecked=0, Total=51302 [2022-11-19 08:10:26,951 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 1302 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:10:26,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 644 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:10:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-11-19 08:10:27,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 951. [2022-11-19 08:10:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 950 states have (on average 1.0021052631578948) internal successors, (952), 950 states have internal predecessors, (952), 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) [2022-11-19 08:10:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 952 transitions. [2022-11-19 08:10:27,007 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 952 transitions. Word has length 469 [2022-11-19 08:10:27,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:10:27,008 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 952 transitions. [2022-11-19 08:10:27,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.860103626943006) internal successors, (938), 192 states have internal predecessors, (938), 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) [2022-11-19 08:10:27,009 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 952 transitions. [2022-11-19 08:10:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 950 [2022-11-19 08:10:27,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:10:27,044 INFO L195 NwaCegarLoop]: trace histogram [182, 181, 181, 181, 181, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:10:27,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 08:10:27,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:10:27,257 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:10:27,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:10:27,257 INFO L85 PathProgramCache]: Analyzing trace with hash -37122367, now seen corresponding path program 5 times [2022-11-19 08:10:27,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:10:27,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40667814] [2022-11-19 08:10:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:10:27,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:10:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:11:01,925 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:01,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:11:01,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40667814] [2022-11-19 08:11:01,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40667814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:11:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132987424] [2022-11-19 08:11:01,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:11:01,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:11:01,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:11:01,931 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:11:01,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:11:05,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 182 check-sat command(s) [2022-11-19 08:11:05,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:11:06,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 8066 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-19 08:11:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:11:07,342 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:07,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:11:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 81812 backedges. 0 proven. 81812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:11:51,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132987424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:11:51,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927475390] [2022-11-19 08:11:51,840 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:11:51,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:11:51,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:11:51,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:11:51,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:11:54,576 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:12:17,934 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17013#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:12:17,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:12:17,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:12:17,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-19 08:12:17,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506623307] [2022-11-19 08:12:17,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:12:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-19 08:12:17,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:12:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-19 08:12:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83852, Invalid=91290, Unknown=0, NotChecked=0, Total=175142 [2022-11-19 08:12:17,967 INFO L87 Difference]: Start difference. First operand 951 states and 952 transitions. Second operand has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 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) [2022-11-19 08:12:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:12:29,191 INFO L93 Difference]: Finished difference Result 1918 states and 2111 transitions. [2022-11-19 08:12:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-19 08:12:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 949 [2022-11-19 08:12:29,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:12:29,200 INFO L225 Difference]: With dead ends: 1918 [2022-11-19 08:12:29,201 INFO L226 Difference]: Without dead ends: 1911 [2022-11-19 08:12:29,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3037 GetRequests, 2619 SyntacticMatches, 1 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26347 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=83852, Invalid=91290, Unknown=0, NotChecked=0, Total=175142 [2022-11-19 08:12:29,213 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3036 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3036 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 645 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:12:29,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3036 Valid, 1240 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [645 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-19 08:12:29,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-11-19 08:12:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1911. [2022-11-19 08:12:29,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 1.0010471204188482) internal successors, (1912), 1910 states have internal predecessors, (1912), 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) [2022-11-19 08:12:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 1912 transitions. [2022-11-19 08:12:29,373 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 1912 transitions. Word has length 949 [2022-11-19 08:12:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:12:29,374 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 1912 transitions. [2022-11-19 08:12:29,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.92987012987013) internal successors, (1898), 384 states have internal predecessors, (1898), 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) [2022-11-19 08:12:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 1912 transitions. [2022-11-19 08:12:29,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1910 [2022-11-19 08:12:29,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:12:29,404 INFO L195 NwaCegarLoop]: trace histogram [374, 373, 373, 373, 373, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:12:29,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:12:29,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:12:29,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:12:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:12:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -239609151, now seen corresponding path program 6 times [2022-11-19 08:12:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:12:29,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573257877] [2022-11-19 08:12:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:12:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:12:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:34,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:15:34,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573257877] [2022-11-19 08:15:34,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573257877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:34,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629140861] [2022-11-19 08:15:34,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:15:34,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:34,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:34,775 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:34,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:15:38,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:15:38,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 16130 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-19 08:15:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:41,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:18:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 347636 backedges. 0 proven. 347636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:18:44,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629140861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:18:44,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454815430] [2022-11-19 08:18:44,215 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-11-19 08:18:44,215 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:18:44,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:18:44,216 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:18:44,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:18:46,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:19:16,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34593#(and (<= 0.0 |ULTIMATE.start_main_~g__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~1#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~g__x~20#1|) (= (/ 3.0 4.0) |ULTIMATE.start_main_~__tmp_3~0#1|) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1|) (= |ULTIMATE.start_main_~__VERIFIER_assert__cond~0#1| 0) (= |ULTIMATE.start_main_~__tmp_43~0#1| |ULTIMATE.start_main_~f__x~21#1|) (<= |ULTIMATE.start_main_~g__x~0#1| 0.0) (= |ULTIMATE.start_main_~__tmp_45~0#1| |ULTIMATE.start_main_~main____CPAchecker_TMP_2~0#1|) (= ~__return_120502~0 0) (= ~__return_120477~0 |ULTIMATE.start_main_~main__z~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~3#1| 1) (= ~__return_120481~0 |ULTIMATE.start_main_~main__u~0#1|) (<= |ULTIMATE.start_main_~f__x~0#1| 0.0) (= ~__tmp_120439_1~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~5#1| 1) (<= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~2#1| 1) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~9#1| 1) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~main__u~0#1|) (not (<= |ULTIMATE.start_main_~main__i~0#1| 100000)) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~8#1|) (= (/ 1.0 4.0) |ULTIMATE.start_main_~__tmp_4~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~0#1| 1) (= |ULTIMATE.start_main_~__tmp_1~0#1| 0.0) (<= (/ 1.0 4.0) |ULTIMATE.start_main_~g__x~1#1|) (<= (/ 3.0 4.0) |ULTIMATE.start_main_~f__x~1#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~4#1| 1) (= |ULTIMATE.start_main_~__tmp_41~0#1| |ULTIMATE.start_main_~f__x~20#1|) (= |ULTIMATE.start_main_~__tmp_44~0#1| |ULTIMATE.start_main_~g__x~21#1|) (= ~__tmp_120439_0~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (= ~__return_120486~0 |ULTIMATE.start_main_~main____CPAchecker_TMP_1~9#1|) (<= 0.0 |ULTIMATE.start_main_~f__x~0#1|) (<= |ULTIMATE.start_main_~f__x~1#1| (/ 3.0 4.0)) (= |ULTIMATE.start_main_~__tmp_2~0#1| 0.0) (<= 1 |ULTIMATE.start_main_~main____CPAchecker_TMP_0~8#1|) (<= |ULTIMATE.start_main_~g__x~1#1| (/ 1.0 4.0)) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~6#1| 1) (= ~__return_120473~0 |ULTIMATE.start_main_~main__y~0#1|) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |ULTIMATE.start_main_~__tmp_42~0#1| |ULTIMATE.start_main_~main__x~0#1|) (= |ULTIMATE.start_main_~main____CPAchecker_TMP_0~7#1| 1) (= |#NULL.base| 0))' at error location [2022-11-19 08:19:16,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:19:16,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:19:16,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2022-11-19 08:19:16,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896293849] [2022-11-19 08:19:16,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:19:16,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-11-19 08:19:16,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:19:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-11-19 08:19:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315212, Invalid=328794, Unknown=0, NotChecked=0, Total=644006 [2022-11-19 08:19:16,239 INFO L87 Difference]: Start difference. First operand 1911 states and 1912 transitions. Second operand has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 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) [2022-11-19 08:20:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:20:36,885 INFO L93 Difference]: Finished difference Result 3838 states and 4223 transitions. [2022-11-19 08:20:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-19 08:20:36,887 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1909 [2022-11-19 08:20:36,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:20:36,901 INFO L225 Difference]: With dead ends: 3838 [2022-11-19 08:20:36,901 INFO L226 Difference]: Without dead ends: 3831 [2022-11-19 08:20:36,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6109 GetRequests, 5307 SyntacticMatches, 1 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52267 ImplicationChecksByTransitivity, 266.5s TimeCoverageRelationStatistics Valid=315212, Invalid=328794, Unknown=0, NotChecked=0, Total=644006 [2022-11-19 08:20:36,937 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4272 mSDsluCounter, 2359 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4272 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:20:36,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4272 Valid, 2388 Invalid, 2381 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [800 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 08:20:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2022-11-19 08:20:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3831. [2022-11-19 08:20:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 1.0005221932114883) internal successors, (3832), 3830 states have internal predecessors, (3832), 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) [2022-11-19 08:20:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 3832 transitions. [2022-11-19 08:20:37,076 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 3832 transitions. Word has length 1909 [2022-11-19 08:20:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:20:37,079 INFO L495 AbstractCegarLoop]: Abstraction has 3831 states and 3832 transitions. [2022-11-19 08:20:37,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 4.964889466840052) internal successors, (3818), 768 states have internal predecessors, (3818), 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) [2022-11-19 08:20:37,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 3832 transitions. [2022-11-19 08:20:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3830 [2022-11-19 08:20:37,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:20:37,175 INFO L195 NwaCegarLoop]: trace histogram [758, 757, 757, 757, 757, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:20:37,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:20:37,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffa7c40c-2982-4415-bb36-82d4d61e71ef/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:20:37,391 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:20:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:20:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash 280261313, now seen corresponding path program 7 times [2022-11-19 08:20:37,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:20:37,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974043119] [2022-11-19 08:20:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:20:37,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:20:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat