./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.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_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/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_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/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_eb53a242-df5c-424d-b903-4273ae0bc506/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 4e2993d4b0d2c145cb6ebddb0d9f125eb6995ee629adf15e0b0f7e55a8d8a49a --- 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 14:22:47,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:22:47,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:22:47,272 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:22:47,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:22:47,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:22:47,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:22:47,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:22:47,287 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:22:47,288 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:22:47,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:22:47,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:22:47,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:22:47,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:22:47,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:22:47,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:22:47,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:22:47,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:22:47,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:22:47,315 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:22:47,317 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:22:47,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:22:47,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:22:47,322 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:22:47,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:22:47,326 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:22:47,326 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:22:47,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:22:47,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:22:47,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:22:47,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:22:47,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:22:47,336 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:22:47,337 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:22:47,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:22:47,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:22:47,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:22:47,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:22:47,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:22:47,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:22:47,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:22:47,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:22:47,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:22:47,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:22:47,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:22:47,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:22:47,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:22:47,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:22:47,391 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:22:47,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:22:47,391 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:22:47,391 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:22:47,392 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:22:47,393 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:22:47,393 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:22:47,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:22:47,393 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:22:47,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:22:47,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:22:47,394 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:22:47,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:22:47,395 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:22:47,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:22:47,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:22:47,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:22:47,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:22:47,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:22:47,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:22:47,397 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:22:47,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:22:47,398 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:22:47,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:22:47,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:22:47,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:22:47,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:22:47,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:22:47,399 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:22:47,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:22:47,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:22:47,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:22:47,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:22:47,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:22:47,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:22:47,402 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_eb53a242-df5c-424d-b903-4273ae0bc506/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e2993d4b0d2c145cb6ebddb0d9f125eb6995ee629adf15e0b0f7e55a8d8a49a [2022-11-23 14:22:47,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:22:47,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:22:47,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:22:47,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:22:47,675 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:22:47,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2022-11-23 14:22:50,680 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:22:50,870 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:22:50,871 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c [2022-11-23 14:22:50,878 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/data/da5144b73/f85e59e824c543fa8ff9b308ee61515e/FLAG3037e7ebe [2022-11-23 14:22:50,897 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/data/da5144b73/f85e59e824c543fa8ff9b308ee61515e [2022-11-23 14:22:50,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:22:50,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:22:50,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:22:50,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:22:50,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:22:50,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:22:50" (1/1) ... [2022-11-23 14:22:50,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b26041d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:50, skipping insertion in model container [2022-11-23 14:22:50,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:22:50" (1/1) ... [2022-11-23 14:22:50,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:22:50,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:22:51,104 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_eb53a242-df5c-424d-b903-4273ae0bc506/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c[588,601] [2022-11-23 14:22:51,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:22:51,155 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:22:51,171 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_eb53a242-df5c-424d-b903-4273ae0bc506/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound10.c[588,601] [2022-11-23 14:22:51,195 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:22:51,220 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:22:51,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51 WrapperNode [2022-11-23 14:22:51,222 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:22:51,223 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:22:51,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:22:51,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:22:51,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,258 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-11-23 14:22:51,259 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:22:51,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:22:51,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:22:51,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:22:51,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:22:51,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:22:51,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:22:51,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:22:51,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (1/1) ... [2022-11-23 14:22:51,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:22:51,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:22:51,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:22:51,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:22:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:22:51,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:22:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:22:51,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:22:51,376 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:22:51,376 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:22:51,445 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:22:51,447 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:22:51,600 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:22:51,631 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:22:51,631 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-23 14:22:51,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:22:51 BoogieIcfgContainer [2022-11-23 14:22:51,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:22:51,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:22:51,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:22:51,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:22:51,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:22:50" (1/3) ... [2022-11-23 14:22:51,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db341f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:22:51, skipping insertion in model container [2022-11-23 14:22:51,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:51" (2/3) ... [2022-11-23 14:22:51,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@db341f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:22:51, skipping insertion in model container [2022-11-23 14:22:51,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:22:51" (3/3) ... [2022-11-23 14:22:51,644 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound10.c [2022-11-23 14:22:51,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:22:51,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:22:51,741 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:22:51,764 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;@3fe189d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:22:51,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:22:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 14:22:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:22:51,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:22:51,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:22:51,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:22:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:22:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1070258279, now seen corresponding path program 1 times [2022-11-23 14:22:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:22:51,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289594727] [2022-11-23 14:22:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:22:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:22:52,384 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 14:22:52,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:22:52,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289594727] [2022-11-23 14:22:52,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289594727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:22:52,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:22:52,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:22:52,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049006023] [2022-11-23 14:22:52,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:22:52,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:22:52,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:22:52,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:22:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:22:52,460 INFO L87 Difference]: Start difference. First operand has 22 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 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 14:22:52,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:22:52,648 INFO L93 Difference]: Finished difference Result 47 states and 82 transitions. [2022-11-23 14:22:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:22:52,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 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 14:22:52,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:22:52,658 INFO L225 Difference]: With dead ends: 47 [2022-11-23 14:22:52,658 INFO L226 Difference]: Without dead ends: 24 [2022-11-23 14:22:52,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:22:52,670 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:22:52,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:22:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-23 14:22:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-23 14:22:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 14:22:52,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-11-23 14:22:52,741 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 6 [2022-11-23 14:22:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:22:52,742 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-11-23 14:22:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 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 14:22:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-11-23 14:22:52,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:22:52,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:22:52,745 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:22:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:22:52,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:22:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:22:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1088770990, now seen corresponding path program 1 times [2022-11-23 14:22:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:22:52,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744176867] [2022-11-23 14:22:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:52,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:22:52,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:22:52,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665952460] [2022-11-23 14:22:52,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:52,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:22:52,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:22:52,786 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:22:52,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:22:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:22:52,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:22:52,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:22:53,036 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 14:22:53,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:22:53,191 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 14:22:53,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:22:53,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744176867] [2022-11-23 14:22:53,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:22:53,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665952460] [2022-11-23 14:22:53,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665952460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:22:53,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [832454190] [2022-11-23 14:22:53,220 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 14:22:53,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:22:53,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:22:53,230 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:22:53,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:22:53,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 38 for LOIs [2022-11-23 14:22:53,552 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:22:53,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [832454190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:22:53,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:22:53,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 7] total 15 [2022-11-23 14:22:53,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024730281] [2022-11-23 14:22:53,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:22:53,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:22:53,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:22:53,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:22:53,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:22:53,921 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 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 14:22:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:22:54,097 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-11-23 14:22:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:22:54,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-11-23 14:22:54,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:22:54,099 INFO L225 Difference]: With dead ends: 55 [2022-11-23 14:22:54,099 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 14:22:54,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:22:54,101 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:22:54,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 70 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:22:54,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 14:22:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 14:22:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:22:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2022-11-23 14:22:54,118 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 11 [2022-11-23 14:22:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:22:54,119 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2022-11-23 14:22:54,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 3 states have internal predecessors, (7), 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 14:22:54,119 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2022-11-23 14:22:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 14:22:54,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:22:54,121 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:22:54,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 14:22:54,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:22:54,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:22:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:22:54,326 INFO L85 PathProgramCache]: Analyzing trace with hash -700920967, now seen corresponding path program 1 times [2022-11-23 14:22:54,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:22:54,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677468350] [2022-11-23 14:22:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:54,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:22:54,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:22:54,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879262067] [2022-11-23 14:22:54,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:54,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:22:54,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:22:54,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:22:54,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:22:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:22:54,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:22:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:22:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:22:54,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:22:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-23 14:22:54,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:22:54,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677468350] [2022-11-23 14:22:54,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:22:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879262067] [2022-11-23 14:22:54,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879262067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:22:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556688754] [2022-11-23 14:22:54,761 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:22:54,762 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:22:54,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:22:54,762 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:22:54,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:00,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:23:00,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:01,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '602#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:01,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:01,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:23:01,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-23 14:23:01,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022272744] [2022-11-23 14:23:01,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:01,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:23:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:23:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:23:01,417 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:23:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:01,965 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2022-11-23 14:23:01,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:23:01,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 38 [2022-11-23 14:23:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:01,968 INFO L225 Difference]: With dead ends: 62 [2022-11-23 14:23:01,968 INFO L226 Difference]: Without dead ends: 60 [2022-11-23 14:23:01,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:23:01,970 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:01,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:23:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-23 14:23:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2022-11-23 14:23:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:23:01,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2022-11-23 14:23:01,999 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 38 [2022-11-23 14:23:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:02,000 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2022-11-23 14:23:02,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-23 14:23:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2022-11-23 14:23:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:23:02,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:02,002 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:02,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:02,208 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1757443022, now seen corresponding path program 2 times [2022-11-23 14:23:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:02,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232797978] [2022-11-23 14:23:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:02,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:02,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003805179] [2022-11-23 14:23:02,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:23:02,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:02,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:02,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:02,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:23:02,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:23:02,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:23:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:23:02,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 14:23:02,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 14:23:02,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232797978] [2022-11-23 14:23:02,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003805179] [2022-11-23 14:23:02,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003805179] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:02,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846182473] [2022-11-23 14:23:02,510 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:23:02,511 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:02,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:02,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:02,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:06,259 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2022-11-23 14:23:06,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:07,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1051#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:07,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:07,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:23:07,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-23 14:23:07,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764498952] [2022-11-23 14:23:07,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:07,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:23:07,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:23:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:23:07,787 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 14:23:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:07,996 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-11-23 14:23:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:23:07,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 43 [2022-11-23 14:23:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:07,998 INFO L225 Difference]: With dead ends: 74 [2022-11-23 14:23:07,998 INFO L226 Difference]: Without dead ends: 72 [2022-11-23 14:23:07,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:23:08,003 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:08,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 214 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:23:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-23 14:23:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2022-11-23 14:23:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-23 14:23:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-11-23 14:23:08,031 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 43 [2022-11-23 14:23:08,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:08,031 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-11-23 14:23:08,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-23 14:23:08,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-11-23 14:23:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:23:08,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:08,036 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:08,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:08,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:08,241 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1748922073, now seen corresponding path program 3 times [2022-11-23 14:23:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:08,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451856390] [2022-11-23 14:23:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:08,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:08,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679843681] [2022-11-23 14:23:08,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:23:08,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:08,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:08,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:08,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:23:08,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:23:08,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:23:08,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:23:08,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 14:23:08,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 14:23:08,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451856390] [2022-11-23 14:23:08,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679843681] [2022-11-23 14:23:08,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679843681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639976201] [2022-11-23 14:23:08,741 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:23:08,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:08,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:08,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:08,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:13,022 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:23:13,026 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:13,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1565#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:13,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:13,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:23:13,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-23 14:23:13,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128427490] [2022-11-23 14:23:13,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:13,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:23:13,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:13,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:23:13,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:23:13,869 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 14:23:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:14,728 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-11-23 14:23:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:23:14,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 48 [2022-11-23 14:23:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:14,730 INFO L225 Difference]: With dead ends: 82 [2022-11-23 14:23:14,730 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 14:23:14,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:23:14,732 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:14,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:23:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 14:23:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-11-23 14:23:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 16 states have call successors, (16), 11 states have call predecessors, (16), 11 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:23:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2022-11-23 14:23:14,763 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 48 [2022-11-23 14:23:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:14,765 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2022-11-23 14:23:14,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 5 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 14:23:14,766 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2022-11-23 14:23:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 14:23:14,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:14,767 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:14,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:14,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:14,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2025080784, now seen corresponding path program 1 times [2022-11-23 14:23:14,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:14,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156370515] [2022-11-23 14:23:14,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:14,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:14,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:14,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041913170] [2022-11-23 14:23:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:14,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:14,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:14,983 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:14,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:23:15,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:23:15,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:23:15,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:23:15,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:15,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156370515] [2022-11-23 14:23:15,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041913170] [2022-11-23 14:23:15,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041913170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:15,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315491753] [2022-11-23 14:23:15,564 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 14:23:15,564 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:15,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:15,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:15,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:19,856 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:23:19,860 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:20,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2192#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:20,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:20,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:23:20,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-23 14:23:20,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804485129] [2022-11-23 14:23:20,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:20,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:23:20,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:20,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:23:20,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:23:20,978 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-23 14:23:21,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:21,494 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-11-23 14:23:21,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:23:21,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 64 [2022-11-23 14:23:21,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:21,496 INFO L225 Difference]: With dead ends: 94 [2022-11-23 14:23:21,496 INFO L226 Difference]: Without dead ends: 92 [2022-11-23 14:23:21,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:23:21,497 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:21,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 149 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:23:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-23 14:23:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-11-23 14:23:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 14:23:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-11-23 14:23:21,533 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 64 [2022-11-23 14:23:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:21,533 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-11-23 14:23:21,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-23 14:23:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-11-23 14:23:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 14:23:21,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:21,535 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:21,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:21,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:21,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:21,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1309118309, now seen corresponding path program 1 times [2022-11-23 14:23:21,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:21,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527938833] [2022-11-23 14:23:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:21,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:21,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:21,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078305911] [2022-11-23 14:23:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:21,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:21,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:21,782 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:23:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:23:21,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:22,085 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-23 14:23:22,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:22,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:22,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527938833] [2022-11-23 14:23:22,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:22,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078305911] [2022-11-23 14:23:22,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078305911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:23:22,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857907864] [2022-11-23 14:23:22,265 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:23:22,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:22,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:22,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:22,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:26,533 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:23:26,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:27,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2826#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:27,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:27,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:23:27,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-23 14:23:27,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958242027] [2022-11-23 14:23:27,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:27,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:23:27,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:27,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:23:27,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:23:27,846 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:23:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:28,036 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-11-23 14:23:28,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:23:28,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 69 [2022-11-23 14:23:28,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:28,039 INFO L225 Difference]: With dead ends: 97 [2022-11-23 14:23:28,039 INFO L226 Difference]: Without dead ends: 88 [2022-11-23 14:23:28,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:23:28,040 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:28,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 101 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:28,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-23 14:23:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-23 14:23:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 51 states have internal predecessors, (52), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 14:23:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2022-11-23 14:23:28,077 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 69 [2022-11-23 14:23:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:28,077 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2022-11-23 14:23:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-23 14:23:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2022-11-23 14:23:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:23:28,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:28,079 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-23 14:23:28,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-23 14:23:28,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:28,284 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:28,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash 33509209, now seen corresponding path program 4 times [2022-11-23 14:23:28,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:28,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840918433] [2022-11-23 14:23:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:28,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:28,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:28,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475740584] [2022-11-23 14:23:28,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:23:28,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:28,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:28,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:28,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:23:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:23:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 14:23:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-23 14:23:28,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-23 14:23:28,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:28,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840918433] [2022-11-23 14:23:28,925 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:28,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475740584] [2022-11-23 14:23:28,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475740584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:23:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731858630] [2022-11-23 14:23:28,928 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:23:28,928 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:28,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:28,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:28,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:32,482 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:23:32,486 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:33,349 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3548#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:33,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:33,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:23:33,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-23 14:23:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525249090] [2022-11-23 14:23:33,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:23:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:23:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:23:33,351 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-23 14:23:36,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:38,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 14:23:38,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:38,165 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-11-23 14:23:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:23:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 70 [2022-11-23 14:23:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:38,168 INFO L225 Difference]: With dead ends: 110 [2022-11-23 14:23:38,168 INFO L226 Difference]: Without dead ends: 108 [2022-11-23 14:23:38,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 14:23:38,169 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:38,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 61 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 465 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 14:23:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-23 14:23:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 96. [2022-11-23 14:23:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 25 states have call successors, (25), 15 states have call predecessors, (25), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 14:23:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2022-11-23 14:23:38,228 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 70 [2022-11-23 14:23:38,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:38,229 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2022-11-23 14:23:38,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 13 states have internal predecessors, (25), 9 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2022-11-23 14:23:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2022-11-23 14:23:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 14:23:38,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:38,232 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:38,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 14:23:38,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:38,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:38,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1760296702, now seen corresponding path program 2 times [2022-11-23 14:23:38,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:38,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901442571] [2022-11-23 14:23:38,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:38,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:38,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537336179] [2022-11-23 14:23:38,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:23:38,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:38,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:38,448 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:38,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:23:38,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:23:38,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:23:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 14:23:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 107 proven. 38 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-11-23 14:23:38,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:40,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:40,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901442571] [2022-11-23 14:23:40,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537336179] [2022-11-23 14:23:40,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537336179] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:23:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1960492906] [2022-11-23 14:23:40,133 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:23:40,133 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:40,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:40,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:40,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:44,222 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:23:44,225 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:45,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4314#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:45,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:45,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:23:45,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-23 14:23:45,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290162803] [2022-11-23 14:23:45,707 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:45,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:23:45,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:23:45,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:23:45,709 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 14:23:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:46,264 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2022-11-23 14:23:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:23:46,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 96 [2022-11-23 14:23:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:46,266 INFO L225 Difference]: With dead ends: 123 [2022-11-23 14:23:46,267 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 14:23:46,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:23:46,268 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:46,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 57 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:23:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 14:23:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-23 14:23:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 23 states have call successors, (23), 19 states have call predecessors, (23), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 14:23:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-11-23 14:23:46,303 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 96 [2022-11-23 14:23:46,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:46,304 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-11-23 14:23:46,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-23 14:23:46,304 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-11-23 14:23:46,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 14:23:46,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:46,306 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:46,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:46,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:46,508 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:46,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:46,509 INFO L85 PathProgramCache]: Analyzing trace with hash 74939536, now seen corresponding path program 2 times [2022-11-23 14:23:46,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:46,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415686402] [2022-11-23 14:23:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:46,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:46,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:46,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312748254] [2022-11-23 14:23:46,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:23:46,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:46,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:46,520 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:46,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:23:46,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:23:46,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:23:46,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:23:46,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-11-23 14:23:47,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:23:47,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:23:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415686402] [2022-11-23 14:23:47,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:23:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312748254] [2022-11-23 14:23:47,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312748254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:23:47,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556840371] [2022-11-23 14:23:47,117 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-23 14:23:47,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:23:47,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:23:47,117 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:23:47,117 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:23:51,190 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:23:51,194 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:23:52,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5040#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:23:52,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:23:52,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:23:52,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-23 14:23:52,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272696551] [2022-11-23 14:23:52,366 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:23:52,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:23:52,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:23:52,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:23:52,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:23:52,367 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:23:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:23:52,577 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-11-23 14:23:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:23:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 118 [2022-11-23 14:23:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:23:52,578 INFO L225 Difference]: With dead ends: 116 [2022-11-23 14:23:52,579 INFO L226 Difference]: Without dead ends: 112 [2022-11-23 14:23:52,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:23:52,580 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:23:52,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:23:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-23 14:23:52,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-11-23 14:23:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 23 states have call successors, (23), 20 states have call predecessors, (23), 19 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 14:23:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-11-23 14:23:52,629 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 118 [2022-11-23 14:23:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:23:52,630 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-11-23 14:23:52,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-23 14:23:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-11-23 14:23:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-23 14:23:52,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:23:52,632 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:23:52,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:23:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:52,834 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:23:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:23:52,834 INFO L85 PathProgramCache]: Analyzing trace with hash -782735301, now seen corresponding path program 3 times [2022-11-23 14:23:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:23:52,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290856773] [2022-11-23 14:23:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:23:52,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:23:52,842 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 14:23:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521439357] [2022-11-23 14:23:52,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:23:52,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:23:52,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:23:52,844 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:23:52,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:23:56,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:23:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:23:56,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-23 14:23:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:23:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 188 proven. 210 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-11-23 14:23:58,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:24:02,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:02,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290856773] [2022-11-23 14:24:02,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 14:24:02,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521439357] [2022-11-23 14:24:02,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521439357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:02,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1398250103] [2022-11-23 14:24:02,107 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:24:02,107 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:24:02,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:24:02,108 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:24:02,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:24:05,554 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-23 14:24:05,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:24:11,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5894#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:24:11,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:24:11,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:24:11,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-23 14:24:11,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049264035] [2022-11-23 14:24:11,782 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 14:24:11,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:24:11,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:11,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:24:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:24:11,784 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 14 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-23 14:24:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:14,261 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-11-23 14:24:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:24:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 123 [2022-11-23 14:24:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:14,262 INFO L225 Difference]: With dead ends: 112 [2022-11-23 14:24:14,262 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:24:14,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2022-11-23 14:24:14,266 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:14,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 14:24:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:24:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:24:14,267 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 14:24:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:24:14,267 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 123 [2022-11-23 14:24:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:14,268 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:24:14,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-23 14:24:14,268 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:24:14,268 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:24:14,271 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:24:14,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:14,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:14,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-23 14:24:21,063 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-23 14:24:21,063 INFO L895 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 10) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-11-23 14:24:21,063 INFO L895 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse5 (* 6 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1))) (.cse1 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24)))) (.cse2 (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse5))) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse4 (<= (+ 6 .cse5) |ULTIMATE.start_main_~z~0#1|))) (or (and .cse0 (<= |ULTIMATE.start_main_~a~0#1| 0) (= (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| 12) (* 6 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 (not (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~a~0#1|)) .cse2 (<= |ULTIMATE.start_main_~a~0#1| 10) .cse3 (<= (div (- |ULTIMATE.start_main_~z~0#1|) (- 6)) (+ 2 |ULTIMATE.start_main_~a~0#1|)) .cse4)))) [2022-11-23 14:24:21,063 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-23 14:24:21,063 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-23 14:24:21,064 INFO L895 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse5 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) (.cse2 (* 6 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse4 (+ 6 .cse2)) (.cse0 (* 3 |ULTIMATE.start_main_~n~0#1|)) (.cse1 (* 3 .cse5)) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|))) (or (and (= |ULTIMATE.start_main_~y~0#1| (+ .cse0 .cse1 1)) (<= |ULTIMATE.start_main_~a~0#1| 0) (= (* |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|) (+ (* |ULTIMATE.start_main_~x~0#1| 12) (* 6 (* |ULTIMATE.start_main_~a~0#1| |ULTIMATE.start_main_~x~0#1|)))) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse2)) .cse3 (<= .cse4 |ULTIMATE.start_main_~z~0#1|)) (and (= |ULTIMATE.start_main_~z~0#1| .cse4) (not (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~a~0#1|)) (= (+ .cse0 5 |ULTIMATE.start_main_~y~0#1|) (+ .cse1 |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 10) .cse3 (= (+ (* 6 .cse5) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)) (<= (div (- |ULTIMATE.start_main_~z~0#1|) (- 6)) (+ 2 |ULTIMATE.start_main_~a~0#1|)))))) [2022-11-23 14:24:21,065 INFO L899 garLoopResultBuilder]: For program point L38(lines 33 46) no Hoare annotation was computed. [2022-11-23 14:24:21,065 INFO L895 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 10) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-23 14:24:21,065 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (= (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 10) (<= 0 |ULTIMATE.start_main_~a~0#1|)) [2022-11-23 14:24:21,065 INFO L895 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 .cse0) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 10) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)))) [2022-11-23 14:24:21,065 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-23 14:24:21,065 INFO L895 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-23 14:24:21,065 INFO L895 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1)) (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-23 14:24:21,066 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse5 (* 6 |ULTIMATE.start_main_~n~0#1|))) (let ((.cse0 (= |ULTIMATE.start_main_~y~0#1| (+ (* 3 |ULTIMATE.start_main_~n~0#1|) (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) 1))) (.cse1 (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24)))) (.cse2 (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse5))) (.cse3 (<= 0 |ULTIMATE.start_main_~a~0#1|)) (.cse4 (<= (+ 6 .cse5) |ULTIMATE.start_main_~z~0#1|))) (or (and (= (+ 5 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~z~0#1|) .cse0 (<= |ULTIMATE.start_main_~a~0#1| 0) .cse1 .cse2 .cse3 .cse4) (and .cse0 .cse1 (not (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~a~0#1|)) .cse2 (<= |ULTIMATE.start_main_~a~0#1| 10) .cse3 (<= (div (- |ULTIMATE.start_main_~z~0#1|) (- 6)) (+ 2 |ULTIMATE.start_main_~a~0#1|)) .cse4)))) [2022-11-23 14:24:21,066 INFO L895 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 6 |ULTIMATE.start_main_~n~0#1|))) (and (= (+ (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) 6 (* |ULTIMATE.start_main_~z~0#1| |ULTIMATE.start_main_~z~0#1|)) (+ (* |ULTIMATE.start_main_~z~0#1| 4) (* |ULTIMATE.start_main_~x~0#1| 18) (* |ULTIMATE.start_main_~y~0#1| 24))) (< |ULTIMATE.start_main_~z~0#1| (+ 7 .cse0)) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|)) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 10) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= (+ 6 .cse0) |ULTIMATE.start_main_~z~0#1|))) [2022-11-23 14:24:21,066 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|))) (and (= |ULTIMATE.start_main_~z~0#1| (+ 6 (* 6 |ULTIMATE.start_main_~n~0#1|))) (<= |ULTIMATE.start_main_~n~0#1| (+ |ULTIMATE.start_main_~a~0#1| 1)) (= (+ (* 3 |ULTIMATE.start_main_~n~0#1|) 5 |ULTIMATE.start_main_~y~0#1|) (+ (* 3 .cse0) |ULTIMATE.start_main_~z~0#1|)) (<= |ULTIMATE.start_main_~a~0#1| 10) (<= 0 |ULTIMATE.start_main_~a~0#1|) (= (+ (* 6 .cse0) (* |ULTIMATE.start_main_~n~0#1| 12) (* |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~n~0#1|) 8) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~z~0#1|)))) [2022-11-23 14:24:21,066 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 17) no Hoare annotation was computed. [2022-11-23 14:24:21,066 INFO L899 garLoopResultBuilder]: For program point L15(lines 15 18) no Hoare annotation was computed. [2022-11-23 14:24:21,066 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-11-23 14:24:21,066 INFO L899 garLoopResultBuilder]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2022-11-23 14:24:21,066 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2022-11-23 14:24:21,066 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2022-11-23 14:24:21,069 INFO L444 BasicCegarLoop]: Path program histogram: [4, 3, 2, 1, 1] [2022-11-23 14:24:21,071 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:24:21,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:24:21 BoogieIcfgContainer [2022-11-23 14:24:21,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:24:21,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:24:21,087 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:24:21,087 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:24:21,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:22:51" (3/4) ... [2022-11-23 14:24:21,091 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 14:24:21,097 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-23 14:24:21,102 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-23 14:24:21,102 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-23 14:24:21,103 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 14:24:21,103 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:24:21,141 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:24:21,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:24:21,142 INFO L158 Benchmark]: Toolchain (without parser) took 90234.93ms. Allocated memory was 203.4MB in the beginning and 629.1MB in the end (delta: 425.7MB). Free memory was 160.0MB in the beginning and 291.3MB in the end (delta: -131.3MB). Peak memory consumption was 295.6MB. Max. memory is 16.1GB. [2022-11-23 14:24:21,142 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 134.2MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:24:21,143 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.07ms. Allocated memory is still 203.4MB. Free memory was 159.4MB in the beginning and 148.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:24:21,144 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.58ms. Allocated memory is still 203.4MB. Free memory was 148.9MB in the beginning and 147.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:24:21,144 INFO L158 Benchmark]: Boogie Preprocessor took 39.78ms. Allocated memory is still 203.4MB. Free memory was 147.4MB in the beginning and 145.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:24:21,145 INFO L158 Benchmark]: RCFGBuilder took 334.50ms. Allocated memory is still 203.4MB. Free memory was 145.9MB in the beginning and 132.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 14:24:21,145 INFO L158 Benchmark]: TraceAbstraction took 89449.94ms. Allocated memory was 203.4MB in the beginning and 629.1MB in the end (delta: 425.7MB). Free memory was 132.2MB in the beginning and 294.4MB in the end (delta: -162.3MB). Peak memory consumption was 266.2MB. Max. memory is 16.1GB. [2022-11-23 14:24:21,145 INFO L158 Benchmark]: Witness Printer took 54.25ms. Allocated memory is still 629.1MB. Free memory was 294.4MB in the beginning and 291.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:24:21,150 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 134.2MB. Free memory is still 76.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.07ms. Allocated memory is still 203.4MB. Free memory was 159.4MB in the beginning and 148.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.58ms. Allocated memory is still 203.4MB. Free memory was 148.9MB in the beginning and 147.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.78ms. Allocated memory is still 203.4MB. Free memory was 147.4MB in the beginning and 145.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 334.50ms. Allocated memory is still 203.4MB. Free memory was 145.9MB in the beginning and 132.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 89449.94ms. Allocated memory was 203.4MB in the beginning and 629.1MB in the end (delta: 425.7MB). Free memory was 132.2MB in the beginning and 294.4MB in the end (delta: -162.3MB). Peak memory consumption was 266.2MB. Max. memory is 16.1GB. * Witness Printer took 54.25ms. Allocated memory is still 629.1MB. Free memory was 294.4MB in the beginning and 291.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 17]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 89.4s, OverallIterations: 11, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 193 SdHoareTripleChecker+Valid, 8.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 156 mSDsluCounter, 842 SdHoareTripleChecker+Invalid, 8.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 574 mSDsCounter, 402 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2370 IncrementalHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 402 mSolverCounterUnsat, 268 mSDtfsCounter, 2370 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1792 GetRequests, 1526 SyntacticMatches, 9 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1781 ImplicationChecksByTransitivity, 23.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=10, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 44 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 65 PreInvPairs, 105 NumberOfFragments, 837 HoareAnnotationTreeSize, 65 FomulaSimplifications, 211 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 14 FomulaSimplificationsInter, 20884 FormulaSimplificationTreeSizeReductionInter, 6.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 10.9s InterpolantComputationTime, 686 NumberOfCodeBlocks, 508 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 943 ConstructedInterpolants, 0 QuantifiedInterpolants, 5077 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1326 ConjunctsInSsa, 289 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 4089/4556 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: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME: 0.1s, TOOLS_POST_CALL_APPLICATIONS: 4, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 2, TOOLS_POST_RETURN_TIME: 0.1s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 15, TOOLS_QUANTIFIERELIM_TIME: 0.2s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 25, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, 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: 9, 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: 49, DAG_COMPRESSION_RETAINED_NODES: 29, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n * n * n == x && z == 6 + 6 * n) && n <= a + 1) && 3 * n + 5 + y == 3 * (n * n) + z) && a <= 10) && 0 <= a - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: z < 7 + 6 * n && 6 + 6 * n <= z RESULT: Ultimate proved your program to be correct! [2022-11-23 14:24:21,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb53a242-df5c-424d-b903-4273ae0bc506/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