./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW --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 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- 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-4e7fbc6 [2022-11-23 13:51:06,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:51:06,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:51:06,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:51:06,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:51:06,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:51:06,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:51:06,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:51:06,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:51:06,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:51:06,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:51:06,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:51:06,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:51:06,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:51:06,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:51:06,243 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:51:06,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:51:06,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:51:06,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:51:06,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:51:06,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:51:06,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:51:06,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:51:06,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:51:06,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:51:06,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:51:06,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:51:06,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:51:06,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:51:06,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:51:06,275 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:51:06,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:51:06,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:51:06,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:51:06,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:51:06,278 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:51:06,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:51:06,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:51:06,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:51:06,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:51:06,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:51:06,289 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:51:06,329 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:51:06,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:51:06,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:51:06,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:51:06,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:51:06,330 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:51:06,331 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:51:06,335 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:51:06,335 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:51:06,336 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:51:06,337 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:51:06,337 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:51:06,337 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:51:06,337 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:51:06,337 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:51:06,338 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:51:06,338 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:51:06,338 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:51:06,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:51:06,339 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:51:06,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:51:06,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:51:06,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:51:06,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:51:06,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:51:06,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:51:06,341 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:51:06,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:51:06,341 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:51:06,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:51:06,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:51:06,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:51:06,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:51:06,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:51:06,342 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:51:06,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:51:06,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:51:06,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:51:06,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:51:06,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:51:06,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:51:06,344 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_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2022-11-23 13:51:06,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:51:06,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:51:06,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:51:06,736 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:51:06,748 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:51:06,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-23 13:51:09,796 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:51:10,037 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:51:10,038 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-23 13:51:10,046 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data/112f3c711/0f85757dbdf64c459f036c7119f19157/FLAGf2471c3f2 [2022-11-23 13:51:10,063 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data/112f3c711/0f85757dbdf64c459f036c7119f19157 [2022-11-23 13:51:10,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:51:10,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:51:10,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:51:10,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:51:10,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:51:10,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749bdef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10, skipping insertion in model container [2022-11-23 13:51:10,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:51:10,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:51:10,294 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-23 13:51:10,321 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-23 13:51:10,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:51:10,336 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:51:10,348 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-23 13:51:10,360 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-23 13:51:10,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:51:10,373 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:51:10,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10 WrapperNode [2022-11-23 13:51:10,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:51:10,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:51:10,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:51:10,375 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:51:10,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,409 INFO L138 Inliner]: procedures = 27, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 80 [2022-11-23 13:51:10,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:51:10,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:51:10,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:51:10,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:51:10,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,461 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:51:10,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:51:10,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:51:10,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:51:10,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (1/1) ... [2022-11-23 13:51:10,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:51:10,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:10,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:51:10,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:51:10,539 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:51:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-23 13:51:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-23 13:51:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-23 13:51:10,540 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-23 13:51:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:51:10,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:51:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:51:10,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 13:51:10,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 13:51:10,612 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:51:10,613 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:51:10,831 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:51:10,982 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:51:10,983 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 13:51:10,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:10 BoogieIcfgContainer [2022-11-23 13:51:10,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:51:10,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:51:10,989 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:51:10,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:51:10,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:51:10" (1/3) ... [2022-11-23 13:51:10,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f24e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:10, skipping insertion in model container [2022-11-23 13:51:10,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:51:10" (2/3) ... [2022-11-23 13:51:10,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f24e06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:51:10, skipping insertion in model container [2022-11-23 13:51:10,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:10" (3/3) ... [2022-11-23 13:51:10,996 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2022-11-23 13:51:11,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:51:11,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:51:11,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:51:11,069 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;@60885fb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:51:11,069 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:51:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 13:51:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:51:11,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:11,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:11,082 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash -973186986, now seen corresponding path program 1 times [2022-11-23 13:51:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:11,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112184421] [2022-11-23 13:51:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:11,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 13:51:11,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014360324] [2022-11-23 13:51:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:11,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:11,231 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:11,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:51:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:11,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:51:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:11,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:11,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:11,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112184421] [2022-11-23 13:51:11,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 13:51:11,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014360324] [2022-11-23 13:51:11,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014360324] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:11,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:11,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:11,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907075736] [2022-11-23 13:51:11,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:11,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:11,443 INFO L87 Difference]: Start difference. First operand has 31 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:11,511 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2022-11-23 13:51:11,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:11,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 13:51:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:11,523 INFO L225 Difference]: With dead ends: 53 [2022-11-23 13:51:11,523 INFO L226 Difference]: Without dead ends: 32 [2022-11-23 13:51:11,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:11,531 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:11,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:51:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-23 13:51:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-11-23 13:51:11,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:51:11,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-23 13:51:11,580 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2022-11-23 13:51:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:11,580 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-23 13:51:11,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-23 13:51:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 13:51:11,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:11,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:11,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:11,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 13:51:11,790 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:11,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash -407210184, now seen corresponding path program 1 times [2022-11-23 13:51:11,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:11,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142856696] [2022-11-23 13:51:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:11,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:11,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 13:51:11,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116540976] [2022-11-23 13:51:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:11,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:11,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:11,836 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:11,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:51:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:51:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:11,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:51:11,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:11,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142856696] [2022-11-23 13:51:11,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 13:51:11,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116540976] [2022-11-23 13:51:11,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116540976] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:51:11,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:51:11,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:51:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694645908] [2022-11-23 13:51:11,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:51:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:51:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:51:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:11,976 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:12,013 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-11-23 13:51:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:51:12,014 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 13:51:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:12,016 INFO L225 Difference]: With dead ends: 38 [2022-11-23 13:51:12,016 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 13:51:12,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:51:12,020 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:12,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:51:12,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 13:51:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 13:51:12,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:51:12,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-23 13:51:12,035 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2022-11-23 13:51:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:12,036 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-23 13:51:12,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-23 13:51:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 13:51:12,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:12,037 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:12,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:12,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:12,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1214404405, now seen corresponding path program 1 times [2022-11-23 13:51:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:12,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621398186] [2022-11-23 13:51:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:12,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:12,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 13:51:12,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176448711] [2022-11-23 13:51:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:12,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:12,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:12,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:12,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:51:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:51:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:12,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:12,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:12,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621398186] [2022-11-23 13:51:12,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 13:51:12,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176448711] [2022-11-23 13:51:12,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176448711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:12,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [187684122] [2022-11-23 13:51:12,594 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:51:12,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:51:12,598 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:51:12,607 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:51:12,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:51:13,062 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 13:51:13,085 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:51:13,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '361#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:51:13,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:51:13,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:51:13,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-23 13:51:13,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236657108] [2022-11-23 13:51:13,580 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 13:51:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:51:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:51:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-23 13:51:13,581 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:13,642 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-23 13:51:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:51:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 13:51:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:13,643 INFO L225 Difference]: With dead ends: 40 [2022-11-23 13:51:13,643 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 13:51:13,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-23 13:51:13,651 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:13,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:51:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 13:51:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 13:51:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:51:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-23 13:51:13,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 10 [2022-11-23 13:51:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:13,670 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-23 13:51:13,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-23 13:51:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:51:13,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:13,672 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:13,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:13,877 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1207812715, now seen corresponding path program 2 times [2022-11-23 13:51:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370636775] [2022-11-23 13:51:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:13,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 13:51:13,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032114949] [2022-11-23 13:51:13,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:51:13,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:13,929 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:13,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:51:13,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:51:13,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:51:13,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 13:51:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:14,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:14,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:14,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:14,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370636775] [2022-11-23 13:51:14,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 13:51:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032114949] [2022-11-23 13:51:14,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032114949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [622703723] [2022-11-23 13:51:14,321 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:51:14,321 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:51:14,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:51:14,322 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:51:14,322 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:51:14,566 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 13:51:14,602 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:51:15,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '552#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:51:15,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:51:15,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:51:15,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-23 13:51:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211517252] [2022-11-23 13:51:15,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 13:51:15,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 13:51:15,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 13:51:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-23 13:51:15,149 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:15,291 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-23 13:51:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:51:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 13:51:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:15,293 INFO L225 Difference]: With dead ends: 41 [2022-11-23 13:51:15,294 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 13:51:15,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-11-23 13:51:15,295 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:15,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 104 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 13:51:15,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 13:51:15,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:51:15,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-23 13:51:15,303 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 12 [2022-11-23 13:51:15,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:15,304 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-23 13:51:15,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-23 13:51:15,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:51:15,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:15,305 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:15,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:15,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:15,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1606665208, now seen corresponding path program 3 times [2022-11-23 13:51:15,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:15,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819965598] [2022-11-23 13:51:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:15,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:15,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 13:51:15,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410420716] [2022-11-23 13:51:15,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:51:15,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:15,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:15,537 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:15,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:51:15,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:51:15,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:51:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 13:51:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:15,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:16,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819965598] [2022-11-23 13:51:16,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 13:51:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410420716] [2022-11-23 13:51:16,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410420716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:51:16,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380200805] [2022-11-23 13:51:16,043 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:51:16,043 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:51:16,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:51:16,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:51:16,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:51:16,242 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 13:51:16,257 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:51:16,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '755#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:51:16,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:51:16,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:51:16,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-23 13:51:16,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034321648] [2022-11-23 13:51:16,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 13:51:16,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 13:51:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:51:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 13:51:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:51:16,816 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:51:17,287 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-11-23 13:51:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 13:51:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:51:17,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:51:17,289 INFO L225 Difference]: With dead ends: 46 [2022-11-23 13:51:17,289 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 13:51:17,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-11-23 13:51:17,291 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:51:17,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 128 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:51:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 13:51:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-23 13:51:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:51:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-23 13:51:17,301 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2022-11-23 13:51:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:51:17,301 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-23 13:51:17,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:51:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-23 13:51:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:51:17,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:51:17,302 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:51:17,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:51:17,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:17,507 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:51:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:51:17,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1086190603, now seen corresponding path program 4 times [2022-11-23 13:51:17,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:51:17,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399459975] [2022-11-23 13:51:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:51:17,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:51:17,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 13:51:17,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859329750] [2022-11-23 13:51:17,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:51:17,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:17,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:17,536 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:17,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:51:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:17,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 13:51:17,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:51:17,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:51:31,692 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:52:23,363 WARN L233 SmtUtils]: Spent 40.23s on a formula simplification. DAG size of input: 78 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:12,837 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse12 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse7 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse14 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse3 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse11 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse9 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse10 (* |c_ULTIMATE.start_gcd_test_~a#1| 3)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse0 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|))) (and (or (not .cse0) (let ((.cse4 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse6 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse8 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|))) (and (or (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse4 .cse5)) 0) (not (= .cse6 .cse7))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse4)) 0) (not (= .cse5 .cse8))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse9)) 0) (not (= .cse10 .cse8))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse11 .cse12)) 0) (not (= .cse2 .cse8))) (or (not (= .cse6 .cse10)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse13 .cse12)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse1))) (or (not (= .cse7 .cse8)) (= 0 (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse13 .cse14))))))) (or (let ((.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse18 (* |c_ULTIMATE.start_gcd_test_~b#1| 4)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse19 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse16 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse5)))) (and (or (not (= .cse1 .cse15)) .cse16 (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse17 .cse11)) 0)) (or (not (= .cse13 .cse15)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse10 .cse3)) 0) (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse10))) (or (not (= .cse18 .cse7)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse12)) 0) .cse16) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| |c_ULTIMATE.start_gcd_test_~a#1|) 0) (= |c_ULTIMATE.start_gcd_test_~a#1| 0) (not (= |c_ULTIMATE.start_gcd_test_~b#1| .cse7))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse14)) 0) (not (= .cse19 .cse13)) (not (< .cse2 .cse11))) (or (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse5 .cse3)) 0) (not (= .cse19 .cse18)) .cse16) (or (not (= .cse19 .cse11)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse17 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) (not (< .cse10 |c_ULTIMATE.start_gcd_test_~b#1|))) (or (not (= .cse19 .cse1)) (= (mod |c_ULTIMATE.start_main1_~x~0#1| (+ .cse9 .cse10)) 0) .cse16))) .cse0))) is different from true [2022-11-23 13:53:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-23 13:53:57,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:53:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399459975] [2022-11-23 13:53:57,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 13:53:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859329750] [2022-11-23 13:53:57,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859329750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:53:57,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [405085978] [2022-11-23 13:53:57,559 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:53:57,559 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:53:57,559 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:53:57,560 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:53:57,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:53:57,800 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-23 13:53:57,819 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:53:59,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1002#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 13:53:59,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:53:59,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 13:53:59,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-11-23 13:53:59,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729509826] [2022-11-23 13:53:59,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 13:53:59,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 13:53:59,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:59,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 13:53:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=703, Unknown=1, NotChecked=54, Total=870 [2022-11-23 13:53:59,188 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:03,955 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2022-11-23 13:54:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:54:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 13:54:03,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:03,956 INFO L225 Difference]: With dead ends: 50 [2022-11-23 13:54:03,956 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 13:54:03,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 61.0s TimeCoverageRelationStatistics Valid=141, Invalid=854, Unknown=1, NotChecked=60, Total=1056 [2022-11-23 13:54:03,958 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:03,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 200 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 230 Invalid, 0 Unknown, 35 Unchecked, 2.9s Time] [2022-11-23 13:54:03,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 13:54:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-23 13:54:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 13:54:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-11-23 13:54:03,968 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 14 [2022-11-23 13:54:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:03,968 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-11-23 13:54:03,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-11-23 13:54:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 13:54:03,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:03,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:03,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:04,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:04,186 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1094258415, now seen corresponding path program 1 times [2022-11-23 13:54:04,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:04,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370511909] [2022-11-23 13:54:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:04,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:54:04,210 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 13:54:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 13:54:04,248 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 13:54:04,249 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 13:54:04,250 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-23 13:54:04,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-23 13:54:04,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:54:04,257 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2022-11-23 13:54:04,261 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 13:54:04,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:54:04 BoogieIcfgContainer [2022-11-23 13:54:04,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 13:54:04,286 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 13:54:04,286 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 13:54:04,287 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 13:54:04,287 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:51:10" (3/4) ... [2022-11-23 13:54:04,290 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-23 13:54:04,291 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 13:54:04,291 INFO L158 Benchmark]: Toolchain (without parser) took 174217.12ms. Allocated memory was 130.0MB in the beginning and 186.6MB in the end (delta: 56.6MB). Free memory was 87.8MB in the beginning and 63.7MB in the end (delta: 24.1MB). Peak memory consumption was 83.7MB. Max. memory is 16.1GB. [2022-11-23 13:54:04,292 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 107.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 13:54:04,292 INFO L158 Benchmark]: CACSL2BoogieTranslator took 296.35ms. Allocated memory is still 130.0MB. Free memory was 87.8MB in the beginning and 76.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 13:54:04,292 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.79ms. Allocated memory is still 130.0MB. Free memory was 76.1MB in the beginning and 74.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 13:54:04,293 INFO L158 Benchmark]: Boogie Preprocessor took 54.75ms. Allocated memory is still 130.0MB. Free memory was 74.4MB in the beginning and 73.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 13:54:04,293 INFO L158 Benchmark]: RCFGBuilder took 519.69ms. Allocated memory was 130.0MB in the beginning and 186.6MB in the end (delta: 56.6MB). Free memory was 73.2MB in the beginning and 158.2MB in the end (delta: -85.1MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2022-11-23 13:54:04,294 INFO L158 Benchmark]: TraceAbstraction took 173297.27ms. Allocated memory is still 186.6MB. Free memory was 157.2MB in the beginning and 63.7MB in the end (delta: 93.5MB). Peak memory consumption was 92.5MB. Max. memory is 16.1GB. [2022-11-23 13:54:04,294 INFO L158 Benchmark]: Witness Printer took 4.67ms. Allocated memory is still 186.6MB. Free memory is still 63.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 13:54:04,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 130.0MB. Free memory is still 107.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 296.35ms. Allocated memory is still 130.0MB. Free memory was 87.8MB in the beginning and 76.1MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.79ms. Allocated memory is still 130.0MB. Free memory was 76.1MB in the beginning and 74.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.75ms. Allocated memory is still 130.0MB. Free memory was 74.4MB in the beginning and 73.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 519.69ms. Allocated memory was 130.0MB in the beginning and 186.6MB in the end (delta: 56.6MB). Free memory was 73.2MB in the beginning and 158.2MB in the end (delta: -85.1MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. * TraceAbstraction took 173297.27ms. Allocated memory is still 186.6MB. Free memory was 157.2MB in the beginning and 63.7MB in the end (delta: 93.5MB). Peak memory consumption was 92.5MB. Max. memory is 16.1GB. * Witness Printer took 4.67ms. Allocated memory is still 186.6MB. Free memory is still 63.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 102. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L82] COND FALSE !(!cond) [L98] RET assume_abort_if_not(IN > -1.2f && IN < 1.2f) [L100] CALL, EXPR f(IN) VAL [unknown-#in~x-unknown=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L100] RET, EXPR f(IN) VAL [f(IN)=109, IN=111] [L100] CALL, EXPR fp(IN) VAL [unknown-#in~x-unknown=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L100] RET, EXPR fp(IN) VAL [f(IN)=109, fp(IN)=113, IN=111] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [unknown-#in~x-unknown=112] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L102] RET, EXPR f(x) VAL [f(x)=110, IN=111, x=112] [L102] CALL, EXPR fp(x) VAL [unknown-#in~x-unknown=112] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L102] RET, EXPR fp(x) VAL [f(x)=110, fp(x)=114, IN=111, x=112] [L102] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=111] [L109] reach_error() VAL [IN=111] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 173.2s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 600 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 458 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 393 IncrementalHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 142 mSDtfsCounter, 393 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 63.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 161.1s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 1744 SizeOfPredicates, 26 NumberOfNonLiveVariables, 457 ConjunctsInSsa, 85 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/64 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-23 13:54:04,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW --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 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a --- 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-4e7fbc6 [2022-11-23 13:54:06,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:54:06,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:54:06,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:54:06,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:54:06,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:54:06,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:54:06,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:54:06,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:54:06,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:54:06,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:54:06,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:54:06,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:54:06,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:54:06,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:54:06,993 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:54:06,995 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:54:06,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:54:06,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:54:07,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:54:07,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:54:07,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:54:07,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:54:07,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:54:07,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:54:07,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:54:07,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:54:07,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:54:07,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:54:07,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:54:07,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:54:07,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:54:07,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:54:07,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:54:07,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:54:07,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:54:07,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:54:07,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:54:07,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:54:07,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:54:07,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:54:07,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-23 13:54:07,069 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:54:07,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:54:07,071 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:54:07,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:54:07,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:54:07,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:54:07,073 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:54:07,074 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:54:07,074 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:54:07,074 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:54:07,075 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:54:07,076 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:54:07,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:54:07,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:54:07,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:54:07,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:54:07,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:54:07,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:54:07,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:54:07,078 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:54:07,079 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 13:54:07,079 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 13:54:07,079 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:54:07,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:54:07,080 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:54:07,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:54:07,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:54:07,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 13:54:07,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:54:07,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:54:07,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:54:07,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:54:07,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:54:07,082 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 13:54:07,083 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:07,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:54:07,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:54:07,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 13:54:07,084 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cac0172a473af199376bf812088f190c7f0980d081815e0ce11da019a58906a [2022-11-23 13:54:07,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:54:07,525 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:54:07,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:54:07,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:54:07,530 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:54:07,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-23 13:54:10,771 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:54:11,081 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:54:11,082 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i [2022-11-23 13:54:11,090 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data/912916f2a/96fdde76e0bb43bdba1965410ea6ea33/FLAG0c9b420e3 [2022-11-23 13:54:11,110 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/data/912916f2a/96fdde76e0bb43bdba1965410ea6ea33 [2022-11-23 13:54:11,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:54:11,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:54:11,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:54:11,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:54:11,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:54:11,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74166786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11, skipping insertion in model container [2022-11-23 13:54:11,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:54:11,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:54:11,330 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-23 13:54:11,360 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-23 13:54:11,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:54:11,377 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:54:11,394 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[1224,1237] [2022-11-23 13:54:11,414 WARN L237 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_67612efe-4488-4df0-9867-621c5b1df319/sv-benchmarks/c/combinations/gcd_4+newton_2_6.i[2827,2840] [2022-11-23 13:54:11,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:54:11,446 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:54:11,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11 WrapperNode [2022-11-23 13:54:11,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:54:11,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:54:11,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:54:11,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:54:11,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,527 INFO L138 Inliner]: procedures = 28, calls = 26, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2022-11-23 13:54:11,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:54:11,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:54:11,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:54:11,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:54:11,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,621 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:54:11,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:54:11,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:54:11,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:54:11,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (1/1) ... [2022-11-23 13:54:11,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:54:11,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:11,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:54:11,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:54:11,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:54:11,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 13:54:11,750 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-23 13:54:11,750 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-23 13:54:11,751 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-23 13:54:11,751 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-23 13:54:11,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:54:11,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:54:11,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 13:54:11,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 13:54:11,868 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:54:11,871 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:54:19,432 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:54:19,441 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:54:19,441 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 13:54:19,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:19 BoogieIcfgContainer [2022-11-23 13:54:19,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:54:19,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:54:19,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:54:19,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:54:19,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:54:11" (1/3) ... [2022-11-23 13:54:19,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748918d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:19, skipping insertion in model container [2022-11-23 13:54:19,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:54:11" (2/3) ... [2022-11-23 13:54:19,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748918d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:54:19, skipping insertion in model container [2022-11-23 13:54:19,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:54:19" (3/3) ... [2022-11-23 13:54:19,456 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_2_6.i [2022-11-23 13:54:19,481 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:54:19,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-23 13:54:19,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:54:19,549 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;@e6177c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:54:19,550 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-23 13:54:19,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 13:54:19,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:54:19,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:19,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:19,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1780479560, now seen corresponding path program 1 times [2022-11-23 13:54:19,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:19,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133127500] [2022-11-23 13:54:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:19,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:19,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:19,599 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:54:19,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 13:54:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:19,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:54:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:19,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:19,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:19,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133127500] [2022-11-23 13:54:19,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133127500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:19,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:54:19,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:54:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12278183] [2022-11-23 13:54:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:19,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:19,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:19,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:19,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:54:19,975 INFO L87 Difference]: Start difference. First operand has 43 states, 30 states have (on average 1.4) internal successors, (42), 32 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:20,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:20,101 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2022-11-23 13:54:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 13:54:20,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:20,113 INFO L225 Difference]: With dead ends: 93 [2022-11-23 13:54:20,113 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 13:54:20,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:54:20,122 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:20,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 92 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 13:54:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-11-23 13:54:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:54:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-23 13:54:20,182 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2022-11-23 13:54:20,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:20,182 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-23 13:54:20,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-23 13:54:20,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 13:54:20,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:20,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:20,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:20,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:20,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:20,402 INFO L85 PathProgramCache]: Analyzing trace with hash 413626440, now seen corresponding path program 1 times [2022-11-23 13:54:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844074413] [2022-11-23 13:54:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:20,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:20,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:54:20,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 13:54:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 13:54:20,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:20,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:20,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:20,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844074413] [2022-11-23 13:54:20,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844074413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:20,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:54:20,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:54:20,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583392136] [2022-11-23 13:54:20,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:20,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:20,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:54:20,645 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:20,774 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-11-23 13:54:20,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 13:54:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:20,776 INFO L225 Difference]: With dead ends: 52 [2022-11-23 13:54:20,776 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 13:54:20,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:54:20,779 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:20,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 13:54:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-23 13:54:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:54:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-23 13:54:20,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2022-11-23 13:54:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:20,789 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-23 13:54:20,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:20,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-23 13:54:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 13:54:20,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:20,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:20,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:20,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:20,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1715037691, now seen corresponding path program 1 times [2022-11-23 13:54:21,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141381065] [2022-11-23 13:54:21,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:21,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:21,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:21,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:54:21,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 13:54:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:54:21,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:21,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:54:21,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:21,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141381065] [2022-11-23 13:54:21,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141381065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:54:21,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:54:21,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:54:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875307333] [2022-11-23 13:54:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:54:21,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:54:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:21,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:54:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:54:21,351 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:21,444 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-11-23 13:54:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:54:21,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-23 13:54:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:21,446 INFO L225 Difference]: With dead ends: 53 [2022-11-23 13:54:21,447 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 13:54:21,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:54:21,449 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:21,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:54:21,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 13:54:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-23 13:54:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:54:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-11-23 13:54:21,458 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 15 [2022-11-23 13:54:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:21,458 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-11-23 13:54:21,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-11-23 13:54:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 13:54:21,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:21,460 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:21,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:21,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:21,661 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1030095042, now seen corresponding path program 1 times [2022-11-23 13:54:21,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:21,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034408030] [2022-11-23 13:54:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:21,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:21,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:54:21,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 13:54:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:21,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 13:54:21,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:22,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:22,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 13:54:22,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034408030] [2022-11-23 13:54:22,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034408030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:22,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [761253997] [2022-11-23 13:54:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:22,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 13:54:22,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 13:54:22,459 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 13:54:22,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-23 13:54:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:22,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 13:54:22,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:22,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:23,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [761253997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595626846] [2022-11-23 13:54:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:54:23,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:54:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:54:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:54:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 13:54:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:54:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:23,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:54:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:54:24,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595626846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:54:24,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 13:54:24,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 10 [2022-11-23 13:54:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241438943] [2022-11-23 13:54:24,100 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:24,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 13:54:24,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 13:54:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 13:54:24,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:54:24,102 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:24,697 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-23 13:54:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:54:24,699 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 13:54:24,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:24,700 INFO L225 Difference]: With dead ends: 60 [2022-11-23 13:54:24,700 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 13:54:24,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:54:24,702 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:24,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 197 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:54:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 13:54:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-23 13:54:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 13:54:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2022-11-23 13:54:24,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 17 [2022-11-23 13:54:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:24,713 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2022-11-23 13:54:24,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:54:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2022-11-23 13:54:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 13:54:24,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:24,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:24,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-23 13:54:24,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:25,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:25,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:54:25,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:25,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:25,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2101905688, now seen corresponding path program 1 times [2022-11-23 13:54:25,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 13:54:25,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429988391] [2022-11-23 13:54:25,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:25,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 13:54:25,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 13:54:25,337 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 13:54:25,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_67612efe-4488-4df0-9867-621c5b1df319/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process