./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:03:02,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:03:02,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:03:02,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:03:02,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:03:02,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:03:02,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:03:02,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:03:02,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:03:02,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:03:02,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:03:02,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:03:02,331 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:03:02,332 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:03:02,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:03:02,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:03:02,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:03:02,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:03:02,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:03:02,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:03:02,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:03:02,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:03:02,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:03:02,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:03:02,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:03:02,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:03:02,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:03:02,361 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:03:02,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:03:02,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:03:02,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:03:02,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:03:02,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:03:02,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:03:02,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:03:02,366 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:03:02,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:03:02,367 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:03:02,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:03:02,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:03:02,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:03:02,371 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:03:02,405 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:03:02,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:03:02,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:03:02,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:03:02,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:03:02,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:03:02,408 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:03:02,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:03:02,408 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:03:02,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:03:02,409 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:03:02,409 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:03:02,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:03:02,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:03:02,410 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:03:02,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:03:02,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:03:02,410 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:03:02,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:03:02,412 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:03:02,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:03:02,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:03:02,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:03:02,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:03:02,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:03:02,413 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:03:02,414 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:03:02,414 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:03:02,414 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:03:02,414 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:03:02,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:03:02,415 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:03:02,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:03:02,415 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:03:02,416 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:03:02,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:03:02,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:03:02,416 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:03:02,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:03:02,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:03:02,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:03:02,417 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_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aeeaf8ddcaaadce0bb307be8d4cdfb2d28179f7ce6737573dce6c1be4b061da1 [2022-11-23 15:03:02,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:03:02,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:03:02,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:03:02,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:03:02,759 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:03:02,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2022-11-23 15:03:05,891 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:03:06,069 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:03:06,069 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c [2022-11-23 15:03:06,076 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/data/328a8da1a/3b2366663b69449992e753450ccceb5c/FLAGa1b9becd2 [2022-11-23 15:03:06,091 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/data/328a8da1a/3b2366663b69449992e753450ccceb5c [2022-11-23 15:03:06,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:03:06,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:03:06,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:03:06,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:03:06,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:03:06,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27eeef55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06, skipping insertion in model container [2022-11-23 15:03:06,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:03:06,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:03:06,308 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_5796a02a-de67-4a86-8ed0-a4986d1eaeec/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c[520,533] [2022-11-23 15:03:06,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:03:06,335 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:03:06,347 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_5796a02a-de67-4a86-8ed0-a4986d1eaeec/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound100.c[520,533] [2022-11-23 15:03:06,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:03:06,367 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:03:06,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06 WrapperNode [2022-11-23 15:03:06,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:03:06,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:03:06,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:03:06,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:03:06,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,384 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,401 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2022-11-23 15:03:06,402 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:03:06,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:03:06,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:03:06,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:03:06,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,427 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:03:06,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:03:06,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:03:06,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:03:06,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (1/1) ... [2022-11-23 15:03:06,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:03:06,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:06,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:03:06,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:03:06,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:03:06,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:03:06,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:03:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:03:06,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 15:03:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 15:03:06,587 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:03:06,590 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:03:06,725 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:03:06,742 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:03:06,742 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 15:03:06,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:06 BoogieIcfgContainer [2022-11-23 15:03:06,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:03:06,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:03:06,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:03:06,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:03:06,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:03:06" (1/3) ... [2022-11-23 15:03:06,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639d3006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:06, skipping insertion in model container [2022-11-23 15:03:06,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:03:06" (2/3) ... [2022-11-23 15:03:06,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@639d3006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:03:06, skipping insertion in model container [2022-11-23 15:03:06,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:06" (3/3) ... [2022-11-23 15:03:06,754 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound100.c [2022-11-23 15:03:06,782 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:03:06,782 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:03:06,919 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:03:06,925 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;@48183713, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:03:06,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 15:03:06,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 15:03:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:03:06,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:06,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:03:06,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1839711150, now seen corresponding path program 1 times [2022-11-23 15:03:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318033528] [2022-11-23 15:03:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:07,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:07,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318033528] [2022-11-23 15:03:07,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318033528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:07,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:07,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:03:07,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077302719] [2022-11-23 15:03:07,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:07,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:03:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:07,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:03:07,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:03:07,147 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:07,174 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2022-11-23 15:03:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 15:03:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2022-11-23 15:03:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:07,184 INFO L225 Difference]: With dead ends: 35 [2022-11-23 15:03:07,184 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 15:03:07,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:03:07,191 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:07,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:03:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 15:03:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 15:03:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:03:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2022-11-23 15:03:07,239 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2022-11-23 15:03:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:07,240 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2022-11-23 15:03:07,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,240 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2022-11-23 15:03:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:03:07,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:07,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:07,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:03:07,243 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:07,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:07,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1660498327, now seen corresponding path program 1 times [2022-11-23 15:03:07,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:07,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663561880] [2022-11-23 15:03:07,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:07,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:07,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:07,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663561880] [2022-11-23 15:03:07,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663561880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:07,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:07,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:03:07,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282635497] [2022-11-23 15:03:07,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:07,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:03:07,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:07,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:03:07,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:07,444 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:07,485 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-11-23 15:03:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:03:07,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-11-23 15:03:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:07,487 INFO L225 Difference]: With dead ends: 27 [2022-11-23 15:03:07,487 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 15:03:07,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:03:07,489 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:07,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:03:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 15:03:07,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 15:03:07,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 15:03:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-23 15:03:07,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2022-11-23 15:03:07,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:07,496 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-23 15:03:07,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,497 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-23 15:03:07,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:03:07,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:07,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:07,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:03:07,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:07,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1658830031, now seen corresponding path program 1 times [2022-11-23 15:03:07,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:07,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664409588] [2022-11-23 15:03:07,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:07,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:07,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664409588] [2022-11-23 15:03:07,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664409588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:07,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:03:07,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:03:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267213945] [2022-11-23 15:03:07,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:07,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:03:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:07,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:03:07,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:03:07,632 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:07,705 INFO L93 Difference]: Finished difference Result 31 states and 42 transitions. [2022-11-23 15:03:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:03:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-11-23 15:03:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:07,707 INFO L225 Difference]: With dead ends: 31 [2022-11-23 15:03:07,707 INFO L226 Difference]: Without dead ends: 29 [2022-11-23 15:03:07,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:03:07,709 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:07,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 62 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:03:07,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-23 15:03:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-11-23 15:03:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 15:03:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2022-11-23 15:03:07,723 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2022-11-23 15:03:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:07,723 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2022-11-23 15:03:07,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2022-11-23 15:03:07,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 15:03:07,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:07,725 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:07,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:03:07,725 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:07,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1386799727, now seen corresponding path program 1 times [2022-11-23 15:03:07,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:07,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226331104] [2022-11-23 15:03:07,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:07,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:07,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:03:07,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424520025] [2022-11-23 15:03:07,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:07,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:07,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:07,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 15:03:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:07,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 15:03:07,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:07,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:03:08,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226331104] [2022-11-23 15:03:08,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:03:08,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424520025] [2022-11-23 15:03:08,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424520025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619242337] [2022-11-23 15:03:08,293 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 15:03:08,293 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:08,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:08,305 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:08,306 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:08,519 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-23 15:03:08,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:08,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1619242337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:03:08,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:03:08,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 17 [2022-11-23 15:03:08,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421120320] [2022-11-23 15:03:08,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:08,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:03:08,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:08,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:03:08,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:03:08,948 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:03:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:09,100 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-11-23 15:03:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:03:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-23 15:03:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:09,102 INFO L225 Difference]: With dead ends: 35 [2022-11-23 15:03:09,102 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 15:03:09,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:03:09,104 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:09,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:03:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 15:03:09,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 15:03:09,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 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) [2022-11-23 15:03:09,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-23 15:03:09,117 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-23 15:03:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:09,117 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-23 15:03:09,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 15:03:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-23 15:03:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:03:09,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:09,119 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:09,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:09,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:09,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:09,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1311551190, now seen corresponding path program 1 times [2022-11-23 15:03:09,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:09,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387765451] [2022-11-23 15:03:09,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:09,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:09,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:03:09,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492052979] [2022-11-23 15:03:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:09,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:09,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:09,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:09,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 15:03:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:09,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 15:03:09,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:03:09,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:03:09,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387765451] [2022-11-23 15:03:09,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:03:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492052979] [2022-11-23 15:03:09,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492052979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1772247917] [2022-11-23 15:03:09,498 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 15:03:09,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:09,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:09,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:09,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:10,843 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-11-23 15:03:10,941 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:11,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '597#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-23 15:03:11,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:03:11,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:03:11,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-23 15:03:11,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679183529] [2022-11-23 15:03:11,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:03:11,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:03:11,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:11,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:03:11,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-23 15:03:11,475 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:03:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:11,609 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2022-11-23 15:03:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:03:11,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2022-11-23 15:03:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:11,611 INFO L225 Difference]: With dead ends: 71 [2022-11-23 15:03:11,611 INFO L226 Difference]: Without dead ends: 62 [2022-11-23 15:03:11,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:03:11,613 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:11,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 115 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:03:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-23 15:03:11,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-11-23 15:03:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-23 15:03:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2022-11-23 15:03:11,634 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 25 [2022-11-23 15:03:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:11,635 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2022-11-23 15:03:11,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 15:03:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2022-11-23 15:03:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 15:03:11,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:11,636 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:11,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:11,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:11,837 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1309882894, now seen corresponding path program 1 times [2022-11-23 15:03:11,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:11,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080822325] [2022-11-23 15:03:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:11,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:03:11,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213956482] [2022-11-23 15:03:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:11,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:11,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:11,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 15:03:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:03:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:03:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 15:03:11,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:03:12,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080822325] [2022-11-23 15:03:12,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:03:12,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213956482] [2022-11-23 15:03:12,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213956482] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 15:03:12,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 15:03:12,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2022-11-23 15:03:12,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139495688] [2022-11-23 15:03:12,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:03:12,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:03:12,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:12,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:03:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:03:12,050 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 15:03:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:12,129 INFO L93 Difference]: Finished difference Result 72 states and 90 transitions. [2022-11-23 15:03:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:03:12,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-23 15:03:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:12,135 INFO L225 Difference]: With dead ends: 72 [2022-11-23 15:03:12,135 INFO L226 Difference]: Without dead ends: 70 [2022-11-23 15:03:12,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:03:12,137 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:12,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:03:12,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-23 15:03:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-23 15:03:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 21 states have call successors, (21), 8 states have call predecessors, (21), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-23 15:03:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-11-23 15:03:12,181 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 25 [2022-11-23 15:03:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:12,181 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-11-23 15:03:12,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 15:03:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-11-23 15:03:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 15:03:12,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:12,184 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:03:12,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:12,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:12,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:12,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:12,385 INFO L85 PathProgramCache]: Analyzing trace with hash 2092232782, now seen corresponding path program 2 times [2022-11-23 15:03:12,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:12,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995139145] [2022-11-23 15:03:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:12,394 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:03:12,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052205934] [2022-11-23 15:03:12,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 15:03:12,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:12,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:12,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:12,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 15:03:12,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 15:03:12,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:03:12,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 15:03:12,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 15:03:12,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 15:03:12,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995139145] [2022-11-23 15:03:12,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:03:12,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052205934] [2022-11-23 15:03:12,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052205934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:12,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381924366] [2022-11-23 15:03:12,785 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:03:12,785 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:12,785 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:12,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:12,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:13,916 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-23 15:03:13,922 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:14,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1360#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:03:14,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:03:14,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:03:14,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2022-11-23 15:03:14,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609914289] [2022-11-23 15:03:14,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:03:14,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 15:03:14,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:14,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 15:03:14,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-11-23 15:03:14,374 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 15:03:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:14,676 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-11-23 15:03:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 15:03:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 30 [2022-11-23 15:03:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:14,680 INFO L225 Difference]: With dead ends: 81 [2022-11-23 15:03:14,680 INFO L226 Difference]: Without dead ends: 76 [2022-11-23 15:03:14,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-11-23 15:03:14,682 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:14,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 57 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:03:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-23 15:03:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-11-23 15:03:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 18 states have call successors, (18), 10 states have call predecessors, (18), 10 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-23 15:03:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2022-11-23 15:03:14,699 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2022-11-23 15:03:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:14,700 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2022-11-23 15:03:14,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 15:03:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2022-11-23 15:03:14,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 15:03:14,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:03:14,702 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-11-23 15:03:14,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:14,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:14,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 15:03:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:03:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1503837811, now seen corresponding path program 3 times [2022-11-23 15:03:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:03:14,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364795471] [2022-11-23 15:03:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:03:14,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:03:14,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 15:03:14,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673308631] [2022-11-23 15:03:14,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 15:03:14,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:14,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:03:14,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:03:14,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:03:15,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 15:03:15,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:03:15,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 15:03:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:03:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 58 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-23 15:03:17,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:03:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 56 proven. 8 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 15:03:20,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:03:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364795471] [2022-11-23 15:03:20,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 15:03:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673308631] [2022-11-23 15:03:20,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673308631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:03:20,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656561727] [2022-11-23 15:03:20,927 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-23 15:03:20,928 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 15:03:20,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 15:03:20,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 15:03:20,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 15:03:21,961 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2022-11-23 15:03:21,968 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 15:03:26,054 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1925#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 15:03:26,054 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 15:03:26,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:03:26,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-23 15:03:26,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252348470] [2022-11-23 15:03:26,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 15:03:26,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 15:03:26,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:03:26,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 15:03:26,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=413, Unknown=2, NotChecked=0, Total=506 [2022-11-23 15:03:26,056 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 15:03:29,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:31,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:32,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:35,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:37,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:38,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:40,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:41,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:43,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:45,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:46,748 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 15:03:48,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:03:48,994 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2022-11-23 15:03:48,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:03:48,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) Word has length 53 [2022-11-23 15:03:48,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:03:48,995 INFO L225 Difference]: With dead ends: 83 [2022-11-23 15:03:48,995 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 15:03:48,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=116, Invalid=532, Unknown=2, NotChecked=0, Total=650 [2022-11-23 15:03:48,997 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 25 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:03:48,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 86 Invalid, 3 Unknown, 0 Unchecked, 21.1s Time] [2022-11-23 15:03:48,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 15:03:48,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 15:03:48,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:03:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 15:03:48,999 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2022-11-23 15:03:48,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:03:48,999 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 15:03:48,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 15:03:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 15:03:49,000 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 15:03:49,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 15:03:49,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:03:49,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:03:49,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 15:04:04,969 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-11-23 15:04:04,969 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 15:04:04,969 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-23 15:04:04,970 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-23 15:04:04,970 INFO L902 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: true [2022-11-23 15:04:04,970 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-23 15:04:04,970 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-23 15:04:04,970 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 15:04:04,970 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-11-23 15:04:04,970 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-23 15:04:04,970 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (let ((.cse0 (* 2 |ULTIMATE.start_main_~a~0#1|))) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 .cse0)) (= (+ (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~a~0#1|) 1 .cse0) |ULTIMATE.start_main_~s~0#1|))) [2022-11-23 15:04:04,970 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (let ((.cse0 (div (+ (- |ULTIMATE.start_main_~t~0#1|) 1) (- 2)))) (+ (* .cse0 .cse0) (* .cse0 2) 1)) |ULTIMATE.start_main_~s~0#1|)) [2022-11-23 15:04:04,970 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-11-23 15:04:04,971 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-11-23 15:04:04,971 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-11-23 15:04:04,971 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-11-23 15:04:04,971 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-11-23 15:04:04,971 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-11-23 15:04:04,973 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-11-23 15:04:04,975 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:04:04,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:04:04 BoogieIcfgContainer [2022-11-23 15:04:04,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:04:04,987 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:04:04,987 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:04:04,988 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:04:04,988 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:03:06" (3/4) ... [2022-11-23 15:04:04,991 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 15:04:04,996 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-23 15:04:04,999 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-23 15:04:05,000 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-23 15:04:05,000 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 15:04:05,000 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 15:04:05,030 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:04:05,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:04:05,031 INFO L158 Benchmark]: Toolchain (without parser) took 58936.04ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 97.8MB in the beginning and 51.5MB in the end (delta: 46.3MB). Peak memory consumption was 106.3MB. Max. memory is 16.1GB. [2022-11-23 15:04:05,031 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 76.5MB in the end (delta: 46.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:04:05,032 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.62ms. Allocated memory is still 132.1MB. Free memory was 97.6MB in the beginning and 87.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:04:05,032 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.62ms. Allocated memory is still 132.1MB. Free memory was 87.2MB in the beginning and 85.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:04:05,032 INFO L158 Benchmark]: Boogie Preprocessor took 27.13ms. Allocated memory is still 132.1MB. Free memory was 85.7MB in the beginning and 84.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:04:05,033 INFO L158 Benchmark]: RCFGBuilder took 314.99ms. Allocated memory is still 132.1MB. Free memory was 84.6MB in the beginning and 73.9MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:04:05,033 INFO L158 Benchmark]: TraceAbstraction took 58239.57ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 73.2MB in the beginning and 53.6MB in the end (delta: 19.6MB). Peak memory consumption was 81.1MB. Max. memory is 16.1GB. [2022-11-23 15:04:05,033 INFO L158 Benchmark]: Witness Printer took 43.27ms. Allocated memory is still 192.9MB. Free memory was 53.6MB in the beginning and 51.5MB in the end (delta: 2.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:04:05,051 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 100.7MB. Free memory was 76.5MB in the beginning and 76.5MB in the end (delta: 46.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.62ms. Allocated memory is still 132.1MB. Free memory was 97.6MB in the beginning and 87.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.62ms. Allocated memory is still 132.1MB. Free memory was 87.2MB in the beginning and 85.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.13ms. Allocated memory is still 132.1MB. Free memory was 85.7MB in the beginning and 84.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 314.99ms. Allocated memory is still 132.1MB. Free memory was 84.6MB in the beginning and 73.9MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 58239.57ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 73.2MB in the beginning and 53.6MB in the end (delta: 19.6MB). Peak memory consumption was 81.1MB. Max. memory is 16.1GB. * Witness Printer took 43.27ms. Allocated memory is still 192.9MB. Free memory was 53.6MB in the beginning and 51.5MB in the end (delta: 2.1MB). 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 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 58.1s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 23.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 21.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 115 mSDsluCounter, 424 SdHoareTripleChecker+Invalid, 21.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 271 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 520 IncrementalHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 153 mSDtfsCounter, 520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 420 GetRequests, 317 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 13.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=7, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 173 HoareAnnotationTreeSize, 44 FomulaSimplifications, 118 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2132 FormulaSimplificationTreeSizeReductionInter, 15.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 165 NumberOfCodeBlocks, 151 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 1298 SizeOfPredicates, 14 NumberOfNonLiveVariables, 422 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 407/446 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: OVERALL_TIME: 0.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 16, TOOLS_QUANTIFIERELIM_TIME: 0.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 27, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 10, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 2, CALL_SUMMARIZER_CACHE_MISSES: 1, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 56, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && a * a + 1 + 2 * a == s RESULT: Ultimate proved your program to be correct! [2022-11-23 15:04:05,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5796a02a-de67-4a86-8ed0-a4986d1eaeec/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE