./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh --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 d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- 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-2329fc7 [2022-12-14 11:37:46,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:37:46,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:37:46,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:37:46,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:37:46,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:37:46,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:37:46,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:37:46,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:37:46,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:37:46,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:37:46,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:37:46,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:37:46,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:37:46,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:37:46,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:37:46,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:37:46,233 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:37:46,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:37:46,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:37:46,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:37:46,238 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:37:46,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:37:46,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:37:46,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:37:46,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:37:46,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:37:46,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:37:46,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:37:46,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:37:46,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:37:46,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:37:46,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:37:46,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:37:46,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:37:46,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:37:46,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:37:46,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:37:46,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:37:46,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:37:46,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:37:46,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:37:46,274 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:37:46,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:37:46,274 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:37:46,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:37:46,275 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:37:46,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:37:46,275 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:37:46,275 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:37:46,275 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:37:46,275 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:37:46,276 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:37:46,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:37:46,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:37:46,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:37:46,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:37:46,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:37:46,276 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:37:46,276 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:37:46,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:37:46,277 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:37:46,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:37:46,277 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:37:46,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:37:46,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:37:46,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:37:46,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:37:46,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:37:46,279 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:37:46,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:37:46,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:37:46,279 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:37:46,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:37:46,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:37:46,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:37:46,280 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2022-12-14 11:37:46,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:37:46,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:37:46,471 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:37:46,473 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:37:46,473 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:37:46,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-12-14 11:37:49,058 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:37:49,172 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:37:49,172 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-12-14 11:37:49,177 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data/bb38e9eea/4b0c892e93864bbd8825898ce70e0c79/FLAG57b2fea91 [2022-12-14 11:37:49,187 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data/bb38e9eea/4b0c892e93864bbd8825898ce70e0c79 [2022-12-14 11:37:49,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:37:49,190 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:37:49,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:37:49,191 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:37:49,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:37:49,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676c2c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49, skipping insertion in model container [2022-12-14 11:37:49,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:37:49,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:37:49,313 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-12-14 11:37:49,329 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-12-14 11:37:49,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:37:49,339 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:37:49,350 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-12-14 11:37:49,360 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-12-14 11:37:49,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:37:49,370 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:37:49,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49 WrapperNode [2022-12-14 11:37:49,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:37:49,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:37:49,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:37:49,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:37:49,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,396 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 85 [2022-12-14 11:37:49,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:37:49,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:37:49,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:37:49,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:37:49,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,412 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:37:49,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:37:49,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:37:49,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:37:49,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (1/1) ... [2022-12-14 11:37:49,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:37:49,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:49,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:37:49,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:37:49,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:37:49,475 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-12-14 11:37:49,475 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-12-14 11:37:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-12-14 11:37:49,476 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-12-14 11:37:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:37:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:37:49,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:37:49,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:37:49,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:37:49,535 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:37:49,537 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:37:49,672 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:37:49,737 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:37:49,737 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:37:49,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:37:49 BoogieIcfgContainer [2022-12-14 11:37:49,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:37:49,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:37:49,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:37:49,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:37:49,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:37:49" (1/3) ... [2022-12-14 11:37:49,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7780a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:37:49, skipping insertion in model container [2022-12-14 11:37:49,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:37:49" (2/3) ... [2022-12-14 11:37:49,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d7780a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:37:49, skipping insertion in model container [2022-12-14 11:37:49,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:37:49" (3/3) ... [2022-12-14 11:37:49,747 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2022-12-14 11:37:49,762 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:37:49,762 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 11:37:49,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:37:49,815 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;@1ad1544d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:37:49,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 11:37:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:37:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:37:49,823 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:49,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:49,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:49,829 INFO L85 PathProgramCache]: Analyzing trace with hash 259234294, now seen corresponding path program 1 times [2022-12-14 11:37:49,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:49,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472435761] [2022-12-14 11:37:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:49,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:49,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:37:49,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938418470] [2022-12-14 11:37:49,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:49,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:49,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:49,911 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:49,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:37:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:49,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:37:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:50,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:37:50,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:50,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472435761] [2022-12-14 11:37:50,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:37:50,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938418470] [2022-12-14 11:37:50,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938418470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:37:50,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:37:50,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:37:50,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693418585] [2022-12-14 11:37:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:37:50,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:37:50,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:37:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:37:50,047 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 21 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2022-12-14 11:37:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:50,092 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-12-14 11:37:50,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:37:50,094 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 [2022-12-14 11:37:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:50,100 INFO L225 Difference]: With dead ends: 56 [2022-12-14 11:37:50,100 INFO L226 Difference]: Without dead ends: 35 [2022-12-14 11:37:50,102 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 [2022-12-14 11:37:50,104 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:50,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 63 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:37:50,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-14 11:37:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-12-14 11:37:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:37:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-12-14 11:37:50,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 8 [2022-12-14 11:37:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:50,132 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-12-14 11:37:50,132 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) [2022-12-14 11:37:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-12-14 11:37:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:37:50,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:50,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:50,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:37:50,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 11:37:50,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:50,337 INFO L85 PathProgramCache]: Analyzing trace with hash -659222671, now seen corresponding path program 1 times [2022-12-14 11:37:50,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:50,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46812850] [2022-12-14 11:37:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:50,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:50,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:37:50,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933050479] [2022-12-14 11:37:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:50,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:50,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:50,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:50,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:37:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:50,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:37:50,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:50,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:37:50,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46812850] [2022-12-14 11:37:50,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:37:50,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933050479] [2022-12-14 11:37:50,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933050479] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:37:50,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:37:50,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:37:50,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600014993] [2022-12-14 11:37:50,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:37:50,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:37:50,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:37:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:37:50,492 INFO L87 Difference]: Start difference. First operand 30 states and 36 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) [2022-12-14 11:37:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:50,510 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-12-14 11:37:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:37:50,510 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 [2022-12-14 11:37:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:50,511 INFO L225 Difference]: With dead ends: 41 [2022-12-14 11:37:50,511 INFO L226 Difference]: Without dead ends: 31 [2022-12-14 11:37:50,511 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 [2022-12-14 11:37:50,512 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 57 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 [2022-12-14 11:37:50,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:37:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-14 11:37:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-14 11:37:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:37:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-12-14 11:37:50,517 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 9 [2022-12-14 11:37:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:50,517 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-12-14 11:37:50,517 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) [2022-12-14 11:37:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-12-14 11:37:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 11:37:50,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:50,517 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:50,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:37:50,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:50,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash -239223413, now seen corresponding path program 1 times [2022-12-14 11:37:50,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:50,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906103590] [2022-12-14 11:37:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:50,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:50,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:37:50,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035276272] [2022-12-14 11:37:50,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:50,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:50,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:50,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:50,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:37:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:50,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:37:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:50,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:50,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906103590] [2022-12-14 11:37:50,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:37:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035276272] [2022-12-14 11:37:50,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035276272] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:50,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858539402] [2022-12-14 11:37:50,872 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:37:50,872 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:50,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:50,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:50,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:51,164 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 11:37:51,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:51,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '384#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:51,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:51,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:37:51,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-14 11:37:51,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541802730] [2022-12-14 11:37:51,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:51,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:37:51,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:51,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:37:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:37:51,530 INFO L87 Difference]: Start difference. First operand 31 states and 37 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) [2022-12-14 11:37:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:51,579 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-12-14 11:37:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:37:51,580 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 [2022-12-14 11:37:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:51,581 INFO L225 Difference]: With dead ends: 43 [2022-12-14 11:37:51,581 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 11:37:51,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:37:51,582 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:51,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:37:51,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 11:37:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-14 11:37:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:37:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-12-14 11:37:51,588 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2022-12-14 11:37:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:51,589 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-12-14 11:37:51,589 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) [2022-12-14 11:37:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-12-14 11:37:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:37:51,590 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:51,590 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:51,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:37:51,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:51,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:51,793 INFO L85 PathProgramCache]: Analyzing trace with hash -211787189, now seen corresponding path program 2 times [2022-12-14 11:37:51,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:51,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341101089] [2022-12-14 11:37:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:51,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:37:51,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925001663] [2022-12-14 11:37:51,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:37:51,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:51,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:51,839 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:51,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:37:51,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 11:37:51,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:51,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:37:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:52,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:52,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341101089] [2022-12-14 11:37:52,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:37:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925001663] [2022-12-14 11:37:52,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925001663] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [99693682] [2022-12-14 11:37:52,193 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:37:52,193 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:52,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:52,193 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:52,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:52,349 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 11:37:52,364 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:52,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:52,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:52,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:37:52,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-12-14 11:37:52,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428541704] [2022-12-14 11:37:52,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:52,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:37:52,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:37:52,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:37:52,720 INFO L87 Difference]: Start difference. First operand 33 states and 39 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) [2022-12-14 11:37:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:52,812 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2022-12-14 11:37:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:37:52,813 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 [2022-12-14 11:37:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:52,814 INFO L225 Difference]: With dead ends: 44 [2022-12-14 11:37:52,814 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 11:37:52,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:37:52,815 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:52,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 156 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:37:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 11:37:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 11:37:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:37:52,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-12-14 11:37:52,823 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 12 [2022-12-14 11:37:52,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:52,823 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-12-14 11:37:52,824 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) [2022-12-14 11:37:52,824 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-12-14 11:37:52,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:37:52,824 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:52,824 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:52,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:37:53,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:53,026 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:53,027 INFO L85 PathProgramCache]: Analyzing trace with hash 746374641, now seen corresponding path program 3 times [2022-12-14 11:37:53,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:53,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794586985] [2022-12-14 11:37:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:53,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:53,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:37:53,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199334655] [2022-12-14 11:37:53,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:37:53,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:53,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:53,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:53,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:37:53,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:37:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:37:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:53,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:53,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:37:53,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794586985] [2022-12-14 11:37:53,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:37:53,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199334655] [2022-12-14 11:37:53,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199334655] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:53,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610378169] [2022-12-14 11:37:53,390 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:37:53,391 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:37:53,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:37:53,391 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:37:53,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:37:53,516 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 11:37:53,527 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:37:53,839 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '798#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:37:53,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:37:53,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:37:53,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-14 11:37:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199438540] [2022-12-14 11:37:53,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:53,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:37:53,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:37:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:37:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:37:53,841 INFO L87 Difference]: Start difference. First operand 34 states and 40 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) [2022-12-14 11:37:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:37:54,154 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-12-14 11:37:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:37:54,154 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 [2022-12-14 11:37:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:37:54,155 INFO L225 Difference]: With dead ends: 49 [2022-12-14 11:37:54,155 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 11:37:54,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2022-12-14 11:37:54,156 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:37:54,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 154 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:37:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 11:37:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 11:37:54,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:37:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-12-14 11:37:54,162 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 13 [2022-12-14 11:37:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:37:54,162 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-12-14 11:37:54,162 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) [2022-12-14 11:37:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-12-14 11:37:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:37:54,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:37:54,163 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:37:54,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:37:54,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:54,365 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:37:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:37:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash 384620299, now seen corresponding path program 4 times [2022-12-14 11:37:54,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:37:54,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622518182] [2022-12-14 11:37:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:37:54,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:37:54,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:37:54,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632359532] [2022-12-14 11:37:54,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:37:54,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:54,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:54,389 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:54,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:37:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:37:54,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 11:37:54,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:54,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:38:10,949 WARN L233 SmtUtils]: Spent 10.56s 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) [2022-12-14 11:39:09,523 WARN L233 SmtUtils]: Spent 49.59s 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) [2022-12-14 11:39:55,844 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 [2022-12-14 11:40:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 11:40:41,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:40:41,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622518182] [2022-12-14 11:40:41,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:40:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632359532] [2022-12-14 11:40:41,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632359532] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:41,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1045791692] [2022-12-14 11:40:41,957 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 11:40:41,957 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:40:41,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:40:41,957 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:40:41,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:40:42,094 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-12-14 11:40:42,105 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:40:43,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1055#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:40:43,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:40:43,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:40:43,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-12-14 11:40:43,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986152006] [2022-12-14 11:40:43,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:43,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:40:43,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:40:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:40:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=703, Unknown=1, NotChecked=54, Total=870 [2022-12-14 11:40:43,194 INFO L87 Difference]: Start difference. First operand 39 states and 46 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) [2022-12-14 11:40:47,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:40:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:47,607 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-12-14 11:40:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:40:47,608 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 [2022-12-14 11:40:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:47,609 INFO L225 Difference]: With dead ends: 53 [2022-12-14 11:40:47,609 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 11:40:47,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=141, Invalid=854, Unknown=1, NotChecked=60, Total=1056 [2022-12-14 11:40:47,610 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:47,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 225 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 199 Invalid, 1 Unknown, 40 Unchecked, 2.9s Time] [2022-12-14 11:40:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 11:40:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 11:40:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 11:40:47,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-12-14 11:40:47,619 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 14 [2022-12-14 11:40:47,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:47,619 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-12-14 11:40:47,620 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) [2022-12-14 11:40:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-12-14 11:40:47,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 11:40:47,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:47,620 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:47,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:40:47,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 11:40:47,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:40:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:47,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1742833996, now seen corresponding path program 1 times [2022-12-14 11:40:47,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:40:47,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863769141] [2022-12-14 11:40:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:47,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:40:47,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:40:47,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162301288] [2022-12-14 11:40:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:40:47,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:47,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:47,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:47,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:40:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:47,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 11:40:47,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:48,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:30,502 WARN L233 SmtUtils]: Spent 18.38s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:21,386 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse16 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (let ((.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse8 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse18 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse19 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse14 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse20 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse10 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse0 (not .cse16))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse3 .cse4)) 0)) (or .cse0 (not (= .cse5 .cse6)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7)) 0)) (or (let ((.cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 4))) (and (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse4 .cse7)) 0) (not (= .cse8 .cse9))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) 0) (not (= .cse9 .cse2))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 .cse12)) 0) (not (= .cse5 .cse13))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse14 .cse15)) 0) (not (= .cse8 .cse5))))) .cse16 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= .cse8 .cse12)) (<= |c_ULTIMATE.start_gcd_test_~b#1| .cse15) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) .cse16) (or (not (= .cse8 .cse17)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18)) 0) .cse19) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse12 .cse10)) 0) (not (= .cse6 .cse20))) (or (not (= .cse2 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse18)) 0) .cse0) (or (= (mod |c_ULTIMATE.start_main1_~y~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| .cse2)) .cse16) (or (not (= .cse17 .cse13)) .cse16 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse15 .cse7)) 0) .cse19) (or (and (or (not (= .cse15 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse14)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0) (not (= .cse4 .cse20))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse10)) 0) (not (= .cse1 .cse15))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse5)))) .cse0)))) is different from true [2022-12-14 11:46:05,639 WARN L233 SmtUtils]: Spent 2.31m on a formula simplification that was a NOOP. DAG size: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:46:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 11:46:05,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863769141] [2022-12-14 11:46:05,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:46:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162301288] [2022-12-14 11:46:05,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162301288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:05,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994370806] [2022-12-14 11:46:05,646 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 11:46:05,646 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:05,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:05,647 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:05,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:05,801 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 46 for LOIs [2022-12-14 11:46:05,858 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:14,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1338#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 11:46:14,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:14,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:46:14,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2022-12-14 11:46:14,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941315921] [2022-12-14 11:46:14,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:14,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 11:46:14,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:14,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 11:46:14,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=849, Unknown=6, NotChecked=60, Total=1056 [2022-12-14 11:46:14,031 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:46:16,538 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse16 (< |c_ULTIMATE.start_gcd_test_~b#1| |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse15 (* |c_ULTIMATE.start_gcd_test_~a#1| 3))) (let ((.cse11 (* |c_ULTIMATE.start_gcd_test_~a#1| (- 3))) (.cse8 (* 7 |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse12 (* |c_ULTIMATE.start_gcd_test_~b#1| 2)) (.cse6 (* |c_ULTIMATE.start_gcd_test_~a#1| 4)) (.cse18 (* (- 2) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse2 (* |c_ULTIMATE.start_gcd_test_~a#1| 5)) (.cse13 (* |c_ULTIMATE.start_gcd_test_~a#1| 8)) (.cse7 (* (- 1) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse19 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse15))) (.cse14 (* (- 2) |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse3 (* |c_ULTIMATE.start_gcd_test_~b#1| (- 3))) (.cse4 (* |c_ULTIMATE.start_gcd_test_~a#1| 2)) (.cse20 (* 7 |c_ULTIMATE.start_gcd_test_~b#1|)) (.cse17 (* |c_ULTIMATE.start_gcd_test_~b#1| 3)) (.cse10 (* (- 1) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse1 (* |c_ULTIMATE.start_gcd_test_~b#1| 8)) (.cse5 (* |c_ULTIMATE.start_gcd_test_~b#1| 5)) (.cse0 (not .cse16))) (and (or .cse0 (not (= .cse1 .cse2)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse3 .cse4)) 0)) (or .cse0 (not (= .cse5 .cse6)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse7)) 0)) (= |c_ULTIMATE.start_main1_~y~0#1| 18) (or (let ((.cse9 (* |c_ULTIMATE.start_gcd_test_~b#1| 4))) (and (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse4 .cse7)) 0) (not (= .cse8 .cse9))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse10)) 0) (not (= .cse9 .cse2))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 .cse12)) 0) (not (= .cse5 .cse13))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse14 .cse15)) 0) (not (= .cse8 .cse5))))) .cse16 (not (< |c_ULTIMATE.start_gcd_test_~b#1| .cse4))) (or (not (= .cse8 .cse12)) (<= |c_ULTIMATE.start_gcd_test_~b#1| .cse15) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse11 |c_ULTIMATE.start_gcd_test_~b#1|)) 0) .cse16) (or (not (= .cse8 .cse17)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~b#1| .cse18)) 0) .cse19) (or .cse0 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse12 .cse10)) 0) (not (= .cse6 .cse20))) (or (not (= .cse2 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse18)) 0) .cse0) (or (= (mod |c_ULTIMATE.start_main1_~y~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| .cse2)) .cse16) (or (not (= .cse17 .cse13)) .cse16 (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse15 .cse7)) 0) .cse19) (= |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) (= |c_ULTIMATE.start_gcd_test_~a#1| 63) (or (and (or (not (= .cse15 .cse20)) (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse14)) 0)) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ |c_ULTIMATE.start_gcd_test_~a#1| .cse3)) 0) (not (= .cse4 .cse20))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| (+ .cse17 .cse10)) 0) (not (= .cse1 .cse15))) (or (= (mod |c_ULTIMATE.start_main1_~y~0#1| |c_ULTIMATE.start_gcd_test_~b#1|) 0) (not (= |c_ULTIMATE.start_gcd_test_~a#1| .cse5)))) .cse0)))) is different from true [2022-12-14 11:46:18,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:46:20,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Real, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:46:21,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 11:46:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:22,320 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-12-14 11:46:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:46:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-12-14 11:46:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:22,320 INFO L225 Difference]: With dead ends: 36 [2022-12-14 11:46:22,320 INFO L226 Difference]: Without dead ends: 18 [2022-12-14 11:46:22,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 190.1s TimeCoverageRelationStatistics Valid=175, Invalid=1016, Unknown=7, NotChecked=134, Total=1332 [2022-12-14 11:46:22,321 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:22,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 262 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 2 Unknown, 36 Unchecked, 6.0s Time] [2022-12-14 11:46:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-14 11:46:22,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-14 11:46:22,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 9 states have (on average 1.0) internal successors, (9), 9 states have internal predecessors, (9), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:46:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 11:46:22,323 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 19 [2022-12-14 11:46:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:22,323 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 11:46:22,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:46:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 11:46:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 11:46:22,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:22,324 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:22,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:46:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:46:22,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1049715433, now seen corresponding path program 1 times [2022-12-14 11:46:22,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:22,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915220363] [2022-12-14 11:46:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:22,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:22,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:46:22,567 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:46:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:46:22,597 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:46:22,597 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:46:22,598 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-12-14 11:46:22,600 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 11:46:22,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 11:46:22,603 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1] [2022-12-14 11:46:22,606 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 11:46:22,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 11:46:22 BoogieIcfgContainer [2022-12-14 11:46:22,624 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 11:46:22,624 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 11:46:22,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 11:46:22,624 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 11:46:22,625 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:37:49" (3/4) ... [2022-12-14 11:46:22,627 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 11:46:22,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 11:46:22,628 INFO L158 Benchmark]: Toolchain (without parser) took 513437.93ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 81.0MB in the beginning and 95.2MB in the end (delta: -14.1MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-12-14 11:46:22,628 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 115.3MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:46:22,629 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.09ms. Allocated memory is still 115.3MB. Free memory was 80.7MB in the beginning and 69.4MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 11:46:22,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.95ms. Allocated memory is still 115.3MB. Free memory was 69.4MB in the beginning and 67.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:46:22,629 INFO L158 Benchmark]: Boogie Preprocessor took 17.72ms. Allocated memory is still 115.3MB. Free memory was 67.8MB in the beginning and 66.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:46:22,629 INFO L158 Benchmark]: RCFGBuilder took 324.77ms. Allocated memory is still 115.3MB. Free memory was 66.4MB in the beginning and 51.2MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 11:46:22,630 INFO L158 Benchmark]: TraceAbstraction took 512881.75ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 50.6MB in the beginning and 95.2MB in the end (delta: -44.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:46:22,630 INFO L158 Benchmark]: Witness Printer took 3.48ms. Allocated memory is still 138.4MB. Free memory is still 95.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:46:22,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 115.3MB. Free memory is still 88.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.09ms. Allocated memory is still 115.3MB. Free memory was 80.7MB in the beginning and 69.4MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.95ms. Allocated memory is still 115.3MB. Free memory was 69.4MB in the beginning and 67.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.72ms. Allocated memory is still 115.3MB. Free memory was 67.8MB in the beginning and 66.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 324.77ms. Allocated memory is still 115.3MB. Free memory was 66.4MB in the beginning and 51.2MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 512881.75ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 50.6MB in the beginning and 95.2MB in the end (delta: -44.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.48ms. Allocated memory is still 138.4MB. Free memory is still 95.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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 104. 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 [\old(x)=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 [\old(x)=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 [\old(x)=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 [\old(x)=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)=116, IN=111, x=112] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=115] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; [L104] RET, EXPR f(x) VAL [f(x)=117, IN=111, x=115] [L104] CALL, EXPR fp(x) VAL [\old(x)=115] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; [L104] RET, EXPR fp(x) VAL [f(x)=117, fp(x)=114, IN=111, x=115] [L104] 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, 34 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 512.8s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 9.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 1022 SdHoareTripleChecker+Invalid, 9.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 76 IncrementalHoareTripleChecker+Unchecked, 829 mSDsCounter, 49 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 530 IncrementalHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 49 mSolverCounterUnsat, 193 mSDtfsCounter, 530 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 224 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 261.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 485.9s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 141 ConstructedInterpolants, 0 QuantifiedInterpolants, 2933 SizeOfPredicates, 33 NumberOfNonLiveVariables, 548 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 4/98 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 [2022-12-14 11:46:22,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh --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 d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 --- 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-2329fc7 [2022-12-14 11:46:24,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:46:24,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:46:24,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:46:24,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:46:24,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:46:24,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:46:24,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:46:24,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:46:24,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:46:24,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:46:24,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:46:24,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:46:24,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:46:24,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:46:24,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:46:24,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:46:24,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:46:24,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:46:24,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:46:24,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:46:24,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:46:24,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:46:24,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:46:24,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:46:24,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:46:24,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:46:24,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:46:24,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:46:24,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:46:24,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:46:24,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:46:24,215 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:46:24,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:46:24,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:46:24,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:46:24,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:46:24,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:46:24,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:46:24,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:46:24,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:46:24,220 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-12-14 11:46:24,247 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:46:24,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:46:24,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:46:24,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:46:24,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:46:24,248 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:46:24,248 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:46:24,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:46:24,248 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:46:24,248 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:46:24,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:46:24,248 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:46:24,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:46:24,249 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:46:24,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:46:24,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:46:24,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:46:24,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:46:24,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:46:24,249 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:46:24,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:46:24,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:46:24,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:46:24,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:46:24,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:46:24,251 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 11:46:24,251 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 11:46:24,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:46:24,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:46:24,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 11:46:24,251 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2ff4855d3411c2183b4955db69fb0d32886e02ca6014c3e616f77788a55bdc3 [2022-12-14 11:46:24,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:46:24,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:46:24,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:46:24,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:46:24,466 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:46:24,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-12-14 11:46:27,113 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:46:27,269 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:46:27,270 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i [2022-12-14 11:46:27,277 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data/90f123e25/6b9560c99258498a96c6722880c8752a/FLAGdffdb4f0b [2022-12-14 11:46:27,291 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/data/90f123e25/6b9560c99258498a96c6722880c8752a [2022-12-14 11:46:27,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:46:27,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:46:27,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:46:27,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:46:27,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:46:27,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53c5e1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27, skipping insertion in model container [2022-12-14 11:46:27,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:46:27,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:46:27,435 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-12-14 11:46:27,451 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-12-14 11:46:27,452 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:46:27,462 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:46:27,472 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[1224,1237] [2022-12-14 11:46:27,478 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_ed7d4365-b649-41dc-9c05-bb75cf662dbd/sv-benchmarks/c/combinations/gcd_4+newton_3_6.i[2848,2861] [2022-12-14 11:46:27,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:46:27,489 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:46:27,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27 WrapperNode [2022-12-14 11:46:27,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:46:27,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:46:27,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:46:27,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:46:27,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,503 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,523 INFO L138 Inliner]: procedures = 28, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 82 [2022-12-14 11:46:27,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:46:27,524 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:46:27,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:46:27,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:46:27,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,548 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:46:27,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:46:27,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:46:27,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:46:27,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (1/1) ... [2022-12-14 11:46:27,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:46:27,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:27,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:46:27,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:46:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:46:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 11:46:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-12-14 11:46:27,612 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-12-14 11:46:27,612 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-12-14 11:46:27,613 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-12-14 11:46:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:46:27,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:46:27,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 11:46:27,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 11:46:27,678 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:46:27,679 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:46:35,624 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:46:35,629 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:46:35,629 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:46:35,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:46:35 BoogieIcfgContainer [2022-12-14 11:46:35,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:46:35,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:46:35,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:46:35,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:46:35,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:46:27" (1/3) ... [2022-12-14 11:46:35,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3596f97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:46:35, skipping insertion in model container [2022-12-14 11:46:35,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:27" (2/3) ... [2022-12-14 11:46:35,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3596f97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:46:35, skipping insertion in model container [2022-12-14 11:46:35,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:46:35" (3/3) ... [2022-12-14 11:46:35,638 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_6.i [2022-12-14 11:46:35,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:46:35,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 11:46:35,690 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:46:35,695 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;@7204d4c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:46:35,695 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 11:46:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:46:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:46:35,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:35,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:35,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:35,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-12-14 11:46:35,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:46:35,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025243337] [2022-12-14 11:46:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:35,716 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 [2022-12-14 11:46:35,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:46:35,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:46:35,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:46:35,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:35,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:35,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:46:35,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025243337] [2022-12-14 11:46:35,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025243337] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:35,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:35,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:35,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104015822] [2022-12-14 11:46:35,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:35,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:46:35,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:46:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:46:35,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:46:35,976 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2022-12-14 11:46:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:36,051 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-12-14 11:46:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:46:36,053 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 [2022-12-14 11:46:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:36,060 INFO L225 Difference]: With dead ends: 99 [2022-12-14 11:46:36,060 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 11:46:36,063 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 [2022-12-14 11:46:36,066 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:36,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 11:46:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-12-14 11:46:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:46:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-12-14 11:46:36,109 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-12-14 11:46:36,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:36,110 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-12-14 11:46:36,110 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) [2022-12-14 11:46:36,110 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-12-14 11:46:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:46:36,111 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:36,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:36,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:36,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:36,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-12-14 11:46:36,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:46:36,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10727209] [2022-12-14 11:46:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:36,314 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 [2022-12-14 11:46:36,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:46:36,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:46:36,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:36,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:46:36,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:36,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:36,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:46:36,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10727209] [2022-12-14 11:46:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10727209] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:36,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:36,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:36,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920773297] [2022-12-14 11:46:36,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:36,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:46:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:46:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:46:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:46:36,435 INFO L87 Difference]: Start difference. First operand 39 states and 47 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) [2022-12-14 11:46:36,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:36,499 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-12-14 11:46:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:46:36,500 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 [2022-12-14 11:46:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:36,501 INFO L225 Difference]: With dead ends: 55 [2022-12-14 11:46:36,501 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 11:46:36,502 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 [2022-12-14 11:46:36,503 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 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 [2022-12-14 11:46:36,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 11:46:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 11:46:36,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:46:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-12-14 11:46:36,513 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-12-14 11:46:36,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:36,514 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-12-14 11:46:36,514 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) [2022-12-14 11:46:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-12-14 11:46:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:46:36,515 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:36,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:36,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:46:36,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:36,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:36,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-12-14 11:46:36,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:46:36,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322106972] [2022-12-14 11:46:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:36,723 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 [2022-12-14 11:46:36,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:46:36,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:46:36,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:46:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:37,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:37,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:46:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322106972] [2022-12-14 11:46:37,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322106972] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:37,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:37,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:37,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830593685] [2022-12-14 11:46:37,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:37,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:46:37,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:46:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:46:37,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:46:37,010 INFO L87 Difference]: Start difference. First operand 41 states and 49 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) [2022-12-14 11:46:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:37,081 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-12-14 11:46:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:46:37,082 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 [2022-12-14 11:46:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:37,083 INFO L225 Difference]: With dead ends: 56 [2022-12-14 11:46:37,083 INFO L226 Difference]: Without dead ends: 43 [2022-12-14 11:46:37,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:46:37,084 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 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 [2022-12-14 11:46:37,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-14 11:46:37,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-14 11:46:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:46:37,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-12-14 11:46:37,088 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-12-14 11:46:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:37,089 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-12-14 11:46:37,089 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) [2022-12-14 11:46:37,089 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-12-14 11:46:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 11:46:37,089 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:37,089 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:37,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:46:37,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:37,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:37,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-12-14 11:46:37,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:46:37,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235072700] [2022-12-14 11:46:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:37,295 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 [2022-12-14 11:46:37,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:46:37,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:46:37,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:37,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:46:37,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:37,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:37,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:46:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235072700] [2022-12-14 11:46:37,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235072700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:37,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [287310945] [2022-12-14 11:46:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:37,821 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:46:37,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:46:37,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:46:37,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 11:46:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:37,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:46:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:38,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:38,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [287310945] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:38,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455058509] [2022-12-14 11:46:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:38,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:38,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:38,194 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:38,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:46:38,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:46:38,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:38,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:38,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455058509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:38,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:46:38,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 10 [2022-12-14 11:46:38,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646006011] [2022-12-14 11:46:38,853 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:38,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:46:38,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:46:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:46:38,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:46:38,854 INFO L87 Difference]: Start difference. First operand 43 states and 51 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) [2022-12-14 11:46:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:39,239 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-12-14 11:46:39,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:46:39,240 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 [2022-12-14 11:46:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:39,240 INFO L225 Difference]: With dead ends: 63 [2022-12-14 11:46:39,241 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 11:46:39,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:46:39,242 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:39,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 227 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:46:39,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 11:46:39,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-12-14 11:46:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 11:46:39,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-12-14 11:46:39,249 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 17 [2022-12-14 11:46:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:39,249 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-12-14 11:46:39,249 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) [2022-12-14 11:46:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-12-14 11:46:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 11:46:39,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:39,250 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:39,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-12-14 11:46:39,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:46:39,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:39,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:39,855 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:46:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash -727680455, now seen corresponding path program 2 times [2022-12-14 11:46:39,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:46:39,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821991751] [2022-12-14 11:46:39,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:46:39,859 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 [2022-12-14 11:46:39,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:46:39,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:46:39,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:46:39,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:46:39,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:46:39,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:46:39,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:46:41,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:46:49,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:46:49,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821991751] [2022-12-14 11:46:49,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821991751] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:49,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1377658828] [2022-12-14 11:46:49,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:46:49,095 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:46:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:46:49,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:46:49,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 11:46:49,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:46:49,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:46:49,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:46:49,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:46:50,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:46:53,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1377658828] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:53,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742957052] [2022-12-14 11:46:53,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:46:53,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:53,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:53,135 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:53,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:46:53,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:46:53,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:46:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:46:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:54,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:57,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742957052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:57,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:46:57,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6, 6, 8, 8] total 36 [2022-12-14 11:46:57,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808568758] [2022-12-14 11:46:57,931 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:57,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:46:57,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:46:57,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:46:57,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:46:57,932 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 36 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:47:24,276 WARN L233 SmtUtils]: Spent 7.36s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:47:45,367 WARN L233 SmtUtils]: Spent 11.99s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:48:03,890 WARN L233 SmtUtils]: Spent 9.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:48:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:11,992 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-12-14 11:48:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:48:12,029 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 11:48:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:12,030 INFO L225 Difference]: With dead ends: 75 [2022-12-14 11:48:12,030 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 11:48:12,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 74.9s TimeCoverageRelationStatistics Valid=222, Invalid=1500, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 11:48:12,031 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:12,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 704 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2022-12-14 11:48:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 11:48:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2022-12-14 11:48:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:48:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-12-14 11:48:12,040 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 23 [2022-12-14 11:48:12,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:12,040 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-12-14 11:48:12,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-12-14 11:48:12,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 11:48:12,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:12,041 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:12,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:48:12,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 11:48:12,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:12,645 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:48:12,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:12,646 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 3 times [2022-12-14 11:48:12,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:12,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [97009882] [2022-12-14 11:48:12,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:48:12,648 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 [2022-12-14 11:48:12,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:12,651 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:48:12,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 (11)] Waiting until timeout for monitored process [2022-12-14 11:48:12,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 11:48:12,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:48:12,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:48:12,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:48:13,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:15,706 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 32))) (not (= (bvadd (bvneg (bvadd |c_ULTIMATE.start_gcd_test_~a#1| (bvneg |ULTIMATE.start_gcd_test_~b#1|))) |ULTIMATE.start_gcd_test_~b#1|) (_ bv0 32)))) is different from false [2022-12-14 11:48:22,677 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_gcd_test_~b#1_32| (_ BitVec 32))) (not (= (bvadd |v_ULTIMATE.start_gcd_test_~b#1_32| (bvneg (bvadd (bvmul (bvneg |c_ULTIMATE.start_gcd_test_~b#1|) (_ bv2 32)) |c_ULTIMATE.start_gcd_test_~a#1| (bvneg |v_ULTIMATE.start_gcd_test_~b#1_32|)))) (_ bv0 32)))) is different from false [2022-12-14 11:48:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 6 trivial. 34 not checked. [2022-12-14 11:48:29,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:29,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [97009882] [2022-12-14 11:48:29,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [97009882] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:29,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235083133] [2022-12-14 11:48:29,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:48:29,819 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:48:29,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:48:29,820 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:48:29,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 11:48:30,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 11:48:30,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:48:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:48:30,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:48:30,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 6 trivial. 34 not checked. [2022-12-14 11:48:32,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235083133] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:32,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781885372] [2022-12-14 11:48:32,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:48:32,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:32,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:32,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:32,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:48:32,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-14 11:48:32,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:48:32,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:48:32,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 11:48:32,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:33,239 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 6 trivial. 34 not checked. [2022-12-14 11:48:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781885372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:33,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:48:33,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-12-14 11:48:33,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489877515] [2022-12-14 11:48:33,240 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:33,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 11:48:33,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:33,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 11:48:33,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=91, Unknown=7, NotChecked=42, Total=182 [2022-12-14 11:48:33,241 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-12-14 11:48:46,080 WARN L233 SmtUtils]: Spent 10.48s on a formula simplification. DAG size of input: 39 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:48:48,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 11:48:51,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:48:53,980 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 32))) (not (= (bvadd (bvneg (bvadd |c_ULTIMATE.start_gcd_test_~a#1| (bvneg |ULTIMATE.start_gcd_test_~b#1|))) |ULTIMATE.start_gcd_test_~b#1|) (_ bv0 32)))) (not (= |c_ULTIMATE.start_gcd_test_~b#1| (_ bv0 32))) (forall ((|v_ULTIMATE.start_gcd_test_~b#1_32| (_ BitVec 32))) (not (= (bvadd |v_ULTIMATE.start_gcd_test_~b#1_32| (bvneg (bvadd (bvmul (bvneg |c_ULTIMATE.start_gcd_test_~b#1|) (_ bv2 32)) |c_ULTIMATE.start_gcd_test_~a#1| (bvneg |v_ULTIMATE.start_gcd_test_~b#1_32|)))) (_ bv0 32))))) is different from false [2022-12-14 11:48:56,036 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_gcd_test_~b#1| (_ BitVec 32))) (not (= (bvadd (bvneg (bvadd |c_ULTIMATE.start_gcd_test_~a#1| (bvneg |ULTIMATE.start_gcd_test_~b#1|))) |ULTIMATE.start_gcd_test_~b#1|) (_ bv0 32)))) (forall ((|v_ULTIMATE.start_gcd_test_~b#1_32| (_ BitVec 32))) (not (= (bvadd |v_ULTIMATE.start_gcd_test_~b#1_32| (bvneg (bvadd (bvmul (bvneg |c_ULTIMATE.start_gcd_test_~b#1|) (_ bv2 32)) |c_ULTIMATE.start_gcd_test_~a#1| (bvneg |v_ULTIMATE.start_gcd_test_~b#1_32|)))) (_ bv0 32))))) is different from false [2022-12-14 11:49:11,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:49:37,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 11:49:39,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 11:49:44,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:49:46,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:49:48,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:50,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:49:51,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:49:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:52,071 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-12-14 11:49:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:49:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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 27 [2022-12-14 11:49:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:52,078 INFO L225 Difference]: With dead ends: 96 [2022-12-14 11:49:52,078 INFO L226 Difference]: Without dead ends: 85 [2022-12-14 11:49:52,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 75.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=16, NotChecked=164, Total=600 [2022-12-14 11:49:52,080 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 33 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 25 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:52,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 268 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 146 Invalid, 8 Unknown, 53 Unchecked, 22.0s Time] [2022-12-14 11:49:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-12-14 11:49:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2022-12-14 11:49:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 61 states have internal predecessors, (73), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 11:49:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2022-12-14 11:49:52,098 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 27 [2022-12-14 11:49:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:52,098 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2022-12-14 11:49:52,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 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) [2022-12-14 11:49:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2022-12-14 11:49:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 11:49:52,099 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:52,100 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:52,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 (11)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:52,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 11:49:52,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:52,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:52,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:49:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:52,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2022-12-14 11:49:52,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:52,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103970991] [2022-12-14 11:49:52,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:52,706 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 [2022-12-14 11:49:52,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:52,709 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:49:52,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 (14)] Waiting until timeout for monitored process [2022-12-14 11:49:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:49:52,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:49:54,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:50:01,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:50:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103970991] [2022-12-14 11:50:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103970991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [591931584] [2022-12-14 11:50:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:01,502 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:50:01,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:50:01,503 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:50:01,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 11:50:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:01,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:50:01,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:50:04,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:50:05,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [591931584] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:05,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988224753] [2022-12-14 11:50:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:05,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:05,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:50:05,667 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:50:05,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:50:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:50:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:50:06,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 11:50:43,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988224753] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:43,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:50:43,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 13, 14] total 34 [2022-12-14 11:50:43,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418857641] [2022-12-14 11:50:43,524 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:50:43,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 11:50:43,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:50:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 11:50:43,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:50:43,526 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 34 states, 30 states have (on average 2.5) internal successors, (75), 33 states have internal predecessors, (75), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 11:51:44,864 WARN L233 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:52:01,301 WARN L233 SmtUtils]: Spent 9.85s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:52:27,506 WARN L233 SmtUtils]: Spent 15.04s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:52:54,812 WARN L233 SmtUtils]: Spent 15.53s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:52:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:52:57,214 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-12-14 11:52:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:52:57,271 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.5) internal successors, (75), 33 states have internal predecessors, (75), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 28 [2022-12-14 11:52:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:52:57,273 INFO L225 Difference]: With dead ends: 94 [2022-12-14 11:52:57,273 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 11:52:57,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 147.7s TimeCoverageRelationStatistics Valid=314, Invalid=1756, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 11:52:57,274 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 43 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:52:57,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 465 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 24.7s Time] [2022-12-14 11:52:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 11:52:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-12-14 11:52:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 68 states have internal predecessors, (83), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 11:52:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-12-14 11:52:57,288 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 28 [2022-12-14 11:52:57,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:52:57,288 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-12-14 11:52:57,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.5) internal successors, (75), 33 states have internal predecessors, (75), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 11:52:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-12-14 11:52:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 11:52:57,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:52:57,289 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:52:57,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 11:52:57,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 (14)] Ended with exit code 0 [2022-12-14 11:52:57,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:52:57,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:57,892 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:52:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:52:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-12-14 11:52:57,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:52:57,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247339136] [2022-12-14 11:52:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:57,895 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 [2022-12-14 11:52:57,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:52:57,898 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:52:57,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed7d4365-b649-41dc-9c05-bb75cf662dbd/bin/utaipan-gh47qXpMRh/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 (17)] Waiting until timeout for monitored process