./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan --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 6ff0df99408e4f7fc8f2cda99e29bcd3b5e6898c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:55:34,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:55:34,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:55:34,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:55:34,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:55:34,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:55:34,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:55:34,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:55:34,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:55:34,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:55:34,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:55:34,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:55:34,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:55:34,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:55:34,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:55:34,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:55:34,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:55:34,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:55:34,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:55:34,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:55:34,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:55:34,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:55:34,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:55:34,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:55:34,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:55:34,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:55:34,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:55:34,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:55:34,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:55:34,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:55:34,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:55:34,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:55:34,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:55:34,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:55:34,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:55:34,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:55:34,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:55:34,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:55:34,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:55:34,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:55:34,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:55:34,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:55:34,315 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:55:34,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:55:34,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:55:34,317 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:55:34,317 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:55:34,318 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:55:34,318 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:55:34,318 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:55:34,319 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:55:34,319 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:55:34,319 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:55:34,320 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:55:34,320 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:55:34,320 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:55:34,321 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:55:34,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:55:34,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:55:34,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:55:34,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:55:34,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:55:34,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:55:34,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:55:34,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:55:34,325 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:55:34,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:55:34,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:55:34,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:55:34,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:55:34,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:55:34,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:55:34,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:55:34,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:55:34,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:55:34,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:55:34,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:55:34,328 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:55:34,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:55:34,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:55:34,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:55:34,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:55:34,329 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ff0df99408e4f7fc8f2cda99e29bcd3b5e6898c [2020-11-22 12:55:34,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:55:34,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:55:34,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:55:34,625 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:55:34,626 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:55:34,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2020-11-22 12:55:34,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/data/84e8715ea/415dba95c8514911b5556d862306ecb9/FLAGa1abcac77 [2020-11-22 12:55:35,117 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:55:35,118 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_unwindbound10.c [2020-11-22 12:55:35,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/data/84e8715ea/415dba95c8514911b5556d862306ecb9/FLAGa1abcac77 [2020-11-22 12:55:35,141 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/data/84e8715ea/415dba95c8514911b5556d862306ecb9 [2020-11-22 12:55:35,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:55:35,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:55:35,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:55:35,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:55:35,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:55:35,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bec9415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35, skipping insertion in model container [2020-11-22 12:55:35,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:55:35,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:55:35,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:55:35,405 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:55:35,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:55:35,459 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:55:35,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35 WrapperNode [2020-11-22 12:55:35,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:55:35,463 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:55:35,463 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:55:35,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:55:35,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,479 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:55:35,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:55:35,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:55:35,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:55:35,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,535 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... [2020-11-22 12:55:35,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:55:35,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:55:35,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:55:35,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:55:35,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:55:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:55:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:55:35,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:55:35,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:55:36,042 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:55:36,042 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-22 12:55:36,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:36 BoogieIcfgContainer [2020-11-22 12:55:36,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:55:36,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:55:36,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:55:36,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:55:36,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:55:35" (1/3) ... [2020-11-22 12:55:36,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fa0a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:55:36, skipping insertion in model container [2020-11-22 12:55:36,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:35" (2/3) ... [2020-11-22 12:55:36,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fa0a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:55:36, skipping insertion in model container [2020-11-22 12:55:36,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:36" (3/3) ... [2020-11-22 12:55:36,052 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound10.c [2020-11-22 12:55:36,063 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:55:36,067 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 12:55:36,081 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 12:55:36,101 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:55:36,101 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:55:36,101 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:55:36,101 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:55:36,101 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:55:36,101 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:55:36,102 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:55:36,102 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:55:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-22 12:55:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:55:36,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:36,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:55:36,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:55:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash 80563898, now seen corresponding path program 1 times [2020-11-22 12:55:36,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:36,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22416118] [2020-11-22 12:55:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:36,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22416118] [2020-11-22 12:55:36,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:55:36,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:55:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508439614] [2020-11-22 12:55:36,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:55:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:55:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:55:36,279 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-22 12:55:36,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:36,293 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-22 12:55:36,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:55:36,294 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-22 12:55:36,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:36,301 INFO L225 Difference]: With dead ends: 25 [2020-11-22 12:55:36,301 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 12:55:36,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:55:36,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 12:55:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 12:55:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 12:55:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-22 12:55:36,333 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-11-22 12:55:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:36,334 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-22 12:55:36,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:55:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-22 12:55:36,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:55:36,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:36,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:55:36,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:55:36,335 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:55:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:36,336 INFO L82 PathProgramCache]: Analyzing trace with hash 79643357, now seen corresponding path program 1 times [2020-11-22 12:55:36,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:36,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257058793] [2020-11-22 12:55:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:36,355 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:55:36,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395307688] [2020-11-22 12:55:36,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:36,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 12:55:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:55:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:36,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:55:36,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:55:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257058793] [2020-11-22 12:55:36,644 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395307688] [2020-11-22 12:55:36,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:55:36,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:55:36,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592840733] [2020-11-22 12:55:36,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:55:36,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:55:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:55:36,647 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-22 12:55:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:38,878 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-22 12:55:38,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:55:38,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 12:55:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:38,880 INFO L225 Difference]: With dead ends: 33 [2020-11-22 12:55:38,881 INFO L226 Difference]: Without dead ends: 26 [2020-11-22 12:55:38,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:55:38,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-22 12:55:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2020-11-22 12:55:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 12:55:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-22 12:55:38,886 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 5 [2020-11-22 12:55:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:38,887 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-22 12:55:38,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:55:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-22 12:55:38,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-22 12:55:38,888 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:38,888 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:55:39,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:55:39,101 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:55:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:39,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1161392796, now seen corresponding path program 1 times [2020-11-22 12:55:39,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:39,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561791583] [2020-11-22 12:55:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:39,117 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:55:39,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573248847] [2020-11-22 12:55:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:39,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:55:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:55:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:39,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:55:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:39,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561791583] [2020-11-22 12:55:39,262 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:39,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573248847] [2020-11-22 12:55:39,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1926726710] [2020-11-22 12:55:39,282 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:55:39,282 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:55:39,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:55:39,290 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:55:39,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:55:39,997 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:55:40,272 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-22 12:55:40,402 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-11-22 12:55:40,540 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:55:40,700 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 12:55:40,878 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 12:55:41,029 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-11-22 12:55:41,522 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-11-22 12:55:41,524 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:41,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:55:41,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-11-22 12:55:41,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692848610] [2020-11-22 12:55:41,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 12:55:41,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 12:55:41,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-22 12:55:41,527 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-11-22 12:55:41,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:41,648 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-11-22 12:55:41,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-22 12:55:41,648 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-11-22 12:55:41,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:41,649 INFO L225 Difference]: With dead ends: 39 [2020-11-22 12:55:41,649 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 12:55:41,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-11-22 12:55:41,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 12:55:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-11-22 12:55:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 12:55:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-22 12:55:41,656 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 10 [2020-11-22 12:55:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:41,657 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-22 12:55:41,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 12:55:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-22 12:55:41,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-22 12:55:41,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:41,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-22 12:55:41,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:41,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:55:41,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:41,859 INFO L82 PathProgramCache]: Analyzing trace with hash 633174813, now seen corresponding path program 1 times [2020-11-22 12:55:41,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:41,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443374621] [2020-11-22 12:55:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:41,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:55:41,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247186567] [2020-11-22 12:55:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-22 12:55:41,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:55:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:42,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:55:42,867 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-11-22 12:55:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:42,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443374621] [2020-11-22 12:55:42,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:42,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247186567] [2020-11-22 12:55:42,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-22 12:55:42,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2020-11-22 12:55:42,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709988264] [2020-11-22 12:55:42,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 12:55:42,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:42,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 12:55:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-11-22 12:55:42,936 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states. [2020-11-22 12:55:47,618 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-22 12:55:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:47,707 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-22 12:55:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:55:47,708 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-22 12:55:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:47,709 INFO L225 Difference]: With dead ends: 29 [2020-11-22 12:55:47,709 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 12:55:47,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2020-11-22 12:55:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 12:55:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-22 12:55:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-22 12:55:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-22 12:55:47,715 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2020-11-22 12:55:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:47,716 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-22 12:55:47,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 12:55:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-22 12:55:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:55:47,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:47,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-11-22 12:55:47,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-22 12:55:47,943 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:55:47,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:47,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1816000587, now seen corresponding path program 1 times [2020-11-22 12:55:47,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:47,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632478863] [2020-11-22 12:55:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:47,955 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:55:47,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414554840] [2020-11-22 12:55:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:55:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-22 12:55:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:55:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:48,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:55:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:55:48,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632478863] [2020-11-22 12:55:48,713 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:48,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414554840] [2020-11-22 12:55:48,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883422766] [2020-11-22 12:55:48,716 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 12:55:48,716 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:55:48,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:55:48,716 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:55:48,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:55:49,042 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:55:49,234 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-11-22 12:55:49,510 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:55:49,696 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 12:55:49,879 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 12:55:49,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:49,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:55:49,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-11-22 12:55:49,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045640363] [2020-11-22 12:55:49,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 12:55:49,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 12:55:49,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-11-22 12:55:49,882 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 10 states. [2020-11-22 12:55:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:54,284 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-22 12:55:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 12:55:54,285 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-22 12:55:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:54,285 INFO L225 Difference]: With dead ends: 25 [2020-11-22 12:55:54,285 INFO L226 Difference]: Without dead ends: 23 [2020-11-22 12:55:54,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-22 12:55:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-22 12:55:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-22 12:55:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-22 12:55:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-22 12:55:54,291 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 13 [2020-11-22 12:55:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:54,292 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-22 12:55:54,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 12:55:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-22 12:55:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-22 12:55:54,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:54,293 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1] [2020-11-22 12:55:54,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:54,497 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:55:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1884262816, now seen corresponding path program 2 times [2020-11-22 12:55:54,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:54,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251942661] [2020-11-22 12:55:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:54,508 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:55:54,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703017231] [2020-11-22 12:55:54,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:54,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-22 12:55:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:55:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-22 12:55:54,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:55:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:54,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:55:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:55:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251942661] [2020-11-22 12:55:54,841 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703017231] [2020-11-22 12:55:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161897474] [2020-11-22 12:55:54,843 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:55:54,844 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:55:54,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:55:54,844 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:55:54,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:55:55,245 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:55:55,854 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-22 12:55:56,091 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-11-22 12:55:56,271 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-11-22 12:55:56,408 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-11-22 12:55:56,961 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-11-22 12:55:56,962 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:55:56,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:55:56,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-22 12:55:56,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261986859] [2020-11-22 12:55:56,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-22 12:55:56,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:55:56,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-22 12:55:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-11-22 12:55:56,964 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 14 states. [2020-11-22 12:55:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:55:57,283 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-11-22 12:55:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-22 12:55:57,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-11-22 12:55:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:55:57,286 INFO L225 Difference]: With dead ends: 51 [2020-11-22 12:55:57,286 INFO L226 Difference]: Without dead ends: 47 [2020-11-22 12:55:57,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2020-11-22 12:55:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-22 12:55:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-22 12:55:57,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 12:55:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-11-22 12:55:57,317 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 22 [2020-11-22 12:55:57,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:55:57,317 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-11-22 12:55:57,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-22 12:55:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-11-22 12:55:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-22 12:55:57,319 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:57,319 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1] [2020-11-22 12:55:57,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:55:57,526 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:55:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1170789352, now seen corresponding path program 3 times [2020-11-22 12:55:57,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:57,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089000647] [2020-11-22 12:55:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:57,544 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:55:57,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252778012] [2020-11-22 12:55:57,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:56:01,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-22 12:56:01,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-22 12:56:01,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:56:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:56:01,232 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:56:01,286 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:56:01,287 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:56:01,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:56:01,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:56:01 BoogieIcfgContainer [2020-11-22 12:56:01,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:56:01,573 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:56:01,573 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:56:01,574 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:56:01,574 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:36" (3/4) ... [2020-11-22 12:56:01,575 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:56:01,660 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_50a8f9ef-ffc4-437e-b91c-0c643592877e/bin/utaipan/witness.graphml [2020-11-22 12:56:01,660 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:56:01,661 INFO L168 Benchmark]: Toolchain (without parser) took 26515.71 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 70.7 MB in the beginning and 62.7 MB in the end (delta: 8.1 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:01,662 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory is still 37.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:56:01,662 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.63 ms. Allocated memory is still 100.7 MB. Free memory was 70.5 MB in the beginning and 78.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:01,663 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.11 ms. Allocated memory is still 100.7 MB. Free memory was 78.0 MB in the beginning and 76.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:01,663 INFO L168 Benchmark]: Boogie Preprocessor took 48.77 ms. Allocated memory is still 100.7 MB. Free memory was 76.4 MB in the beginning and 75.4 MB in the end (delta: 998.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:56:01,664 INFO L168 Benchmark]: RCFGBuilder took 489.79 ms. Allocated memory is still 100.7 MB. Free memory was 75.4 MB in the beginning and 58.1 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:01,664 INFO L168 Benchmark]: TraceAbstraction took 25527.15 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.6 MB in the beginning and 67.9 MB in the end (delta: -10.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:01,665 INFO L168 Benchmark]: Witness Printer took 87.08 ms. Allocated memory is still 121.6 MB. Free memory was 67.9 MB in the beginning and 62.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:56:01,671 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 75.5 MB. Free memory is still 37.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.63 ms. Allocated memory is still 100.7 MB. Free memory was 70.5 MB in the beginning and 78.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.11 ms. Allocated memory is still 100.7 MB. Free memory was 78.0 MB in the beginning and 76.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.77 ms. Allocated memory is still 100.7 MB. Free memory was 76.4 MB in the beginning and 75.4 MB in the end (delta: 998.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 489.79 ms. Allocated memory is still 100.7 MB. Free memory was 75.4 MB in the beginning and 58.1 MB in the end (delta: 17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25527.15 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 57.6 MB in the beginning and 67.9 MB in the end (delta: -10.3 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. * Witness Printer took 87.08 ms. Allocated memory is still 121.6 MB. Free memory was 67.9 MB in the beginning and 62.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] int counter = 0; [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [counter=0] [L31] EXPR counter++ VAL [counter=1] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=1] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=1] [L31] EXPR counter++ VAL [counter=2] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=2] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=2] [L31] EXPR counter++ VAL [counter=3] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=3] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=3] [L31] EXPR counter++ VAL [counter=4] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=4] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=4] [L31] EXPR counter++ VAL [counter=5] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=5] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=5] [L31] EXPR counter++ VAL [counter=6] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=6] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=6] [L31] EXPR counter++ VAL [counter=7] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=7] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=7] [L31] EXPR counter++ VAL [counter=8] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=8] [L35] COND FALSE !(!(x <= X)) [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ [L45] x++ VAL [counter=8] [L31] EXPR counter++ VAL [counter=9] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=9] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=9] [L31] EXPR counter++ VAL [counter=10] [L31] COND TRUE counter++<10 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y [L14] COND FALSE !(!(cond)) VAL [counter=10] [L35] COND FALSE !(!(x <= X)) [L39] COND TRUE v < 0 [L40] v = v + (long long) 2 * Y [L45] x++ VAL [counter=10] [L31] EXPR counter++ VAL [counter=11] [L31] COND FALSE !(counter++<10) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x [L14] COND TRUE !(cond) VAL [counter=11] [L7] __assert_fail("0", "bresenham-ll.c", 7, "reach_error") VAL [counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.3s, OverallIterations: 7, TraceHistogramMax: 11, AutomataDifference: 11.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 94 SDslu, 136 SDs, 0 SdLazy, 124 SolverSat, 44 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 10.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 18 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 118 ConstructedInterpolants, 0 QuantifiedInterpolants, 14063 SizeOfPredicates, 46 NumberOfNonLiveVariables, 449 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 13/96 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...