./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.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_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 d3c827d9ba12fd72f48686db35c000bb18f3620c ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:57:29,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:57:29,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:57:29,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:57:29,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:57:29,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:57:29,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:57:29,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:57:29,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:57:29,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:57:29,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:57:29,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:57:29,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:57:29,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:57:29,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:57:29,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:57:29,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:57:29,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:57:29,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:57:29,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:57:29,235 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:57:29,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:57:29,239 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:57:29,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:57:29,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:57:29,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:57:29,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:57:29,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:57:29,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:57:29,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:57:29,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:57:29,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:57:29,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:57:29,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:57:29,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:57:29,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:57:29,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:57:29,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:57:29,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:57:29,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:57:29,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:57:29,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:57:29,324 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:57:29,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:57:29,326 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:57:29,326 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:57:29,326 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:57:29,327 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:57:29,327 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:57:29,327 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:57:29,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:57:29,328 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:57:29,329 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:57:29,330 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:57:29,330 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:57:29,330 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:57:29,330 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:57:29,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:57:29,332 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:57:29,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:57:29,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:57:29,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:57:29,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:57:29,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:57:29,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:57:29,334 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:57:29,334 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:57:29,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:57:29,334 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:57:29,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:57:29,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:57:29,335 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:57:29,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:57:29,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:57:29,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:57:29,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:57:29,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:57:29,337 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:57:29,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:57:29,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:57:29,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:57:29,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:57:29,338 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_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3c827d9ba12fd72f48686db35c000bb18f3620c [2020-11-22 12:57:29,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:57:29,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:57:29,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:57:29,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:57:29,706 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:57:29,708 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2020-11-22 12:57:29,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/data/ab4038c28/db321b4bef574c5292fc1fa0131105fe/FLAG25a6f34fa [2020-11-22 12:57:30,246 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:57:30,247 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2020-11-22 12:57:30,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/data/ab4038c28/db321b4bef574c5292fc1fa0131105fe/FLAG25a6f34fa [2020-11-22 12:57:30,635 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/data/ab4038c28/db321b4bef574c5292fc1fa0131105fe [2020-11-22 12:57:30,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:57:30,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:57:30,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:30,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:57:30,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:57:30,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20bf90df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30, skipping insertion in model container [2020-11-22 12:57:30,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:57:30,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:57:30,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:30,882 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:57:30,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:57:30,941 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:57:30,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30 WrapperNode [2020-11-22 12:57:30,941 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:57:30,943 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:30,943 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:57:30,943 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:57:30,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,956 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:57:30,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:57:30,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:57:30,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:57:30,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:30,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:31,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:31,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... [2020-11-22 12:57:31,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:57:31,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:57:31,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:57:31,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:57:31,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 12:57:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:57:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:57:31,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:57:31,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:57:31,585 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:57:31,585 INFO L298 CfgBuilder]: Removed 36 assume(true) statements. [2020-11-22 12:57:31,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:31 BoogieIcfgContainer [2020-11-22 12:57:31,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:57:31,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:57:31,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:57:31,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:57:31,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:57:30" (1/3) ... [2020-11-22 12:57:31,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eeb108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:31, skipping insertion in model container [2020-11-22 12:57:31,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:57:30" (2/3) ... [2020-11-22 12:57:31,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eeb108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:57:31, skipping insertion in model container [2020-11-22 12:57:31,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:31" (3/3) ... [2020-11-22 12:57:31,596 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c [2020-11-22 12:57:31,607 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:57:31,612 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-22 12:57:31,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-22 12:57:31,657 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:57:31,657 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:57:31,658 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:57:31,658 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:57:31,658 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:57:31,658 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:57:31,658 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:57:31,659 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:57:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-11-22 12:57:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:57:31,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:31,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:57:31,682 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:31,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:31,689 INFO L82 PathProgramCache]: Analyzing trace with hash 159617293, now seen corresponding path program 1 times [2020-11-22 12:57:31,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:31,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847218460] [2020-11-22 12:57:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:31,870 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 12:57:31,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847218460] [2020-11-22 12:57:31,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:31,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:57:31,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866184154] [2020-11-22 12:57:31,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:57:31,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:31,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:57:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:57:31,906 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-11-22 12:57:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:31,923 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2020-11-22 12:57:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:57:31,924 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-22 12:57:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:31,933 INFO L225 Difference]: With dead ends: 71 [2020-11-22 12:57:31,933 INFO L226 Difference]: Without dead ends: 34 [2020-11-22 12:57:31,936 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 12:57:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-22 12:57:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-22 12:57:31,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-22 12:57:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-11-22 12:57:31,986 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 5 [2020-11-22 12:57:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:31,986 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-11-22 12:57:31,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:57:31,987 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-11-22 12:57:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:57:31,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:31,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:57:31,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:57:31,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:31,989 INFO L82 PathProgramCache]: Analyzing trace with hash 156511088, now seen corresponding path program 1 times [2020-11-22 12:57:31,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:31,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504132261] [2020-11-22 12:57:31,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:32,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:32,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13982049] [2020-11-22 12:57:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 12:57:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 12:57:32,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:32,141 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 12:57:32,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:32,168 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:32,186 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 12:57:32,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504132261] [2020-11-22 12:57:32,187 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:32,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13982049] [2020-11-22 12:57:32,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:32,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:57:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398856058] [2020-11-22 12:57:32,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:32,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:32,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:32,190 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-11-22 12:57:34,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:34,497 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2020-11-22 12:57:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:57:34,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 12:57:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:34,502 INFO L225 Difference]: With dead ends: 85 [2020-11-22 12:57:34,502 INFO L226 Difference]: Without dead ends: 79 [2020-11-22 12:57:34,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-22 12:57:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2020-11-22 12:57:34,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-22 12:57:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-11-22 12:57:34,514 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 5 [2020-11-22 12:57:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:34,514 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-11-22 12:57:34,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-11-22 12:57:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:57:34,515 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:34,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:57:34,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:57:34,737 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash 556911243, now seen corresponding path program 1 times [2020-11-22 12:57:34,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:34,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084423092] [2020-11-22 12:57:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:34,752 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:34,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822076126] [2020-11-22 12:57:34,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 12:57:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:57:34,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:34,846 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 12:57:34,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:34,865 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 12:57:34,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084423092] [2020-11-22 12:57:34,866 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:34,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822076126] [2020-11-22 12:57:34,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:34,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 12:57:34,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567727145] [2020-11-22 12:57:34,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:57:34,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:34,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:57:34,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:57:34,868 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 6 states. [2020-11-22 12:57:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:34,919 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-11-22 12:57:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:34,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-22 12:57:34,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:34,921 INFO L225 Difference]: With dead ends: 64 [2020-11-22 12:57:34,921 INFO L226 Difference]: Without dead ends: 60 [2020-11-22 12:57:34,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-22 12:57:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-11-22 12:57:34,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-22 12:57:34,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-22 12:57:34,931 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-11-22 12:57:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:34,932 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-22 12:57:34,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:57:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-22 12:57:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 12:57:34,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:34,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:35,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:35,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:35,145 INFO L82 PathProgramCache]: Analyzing trace with hash 83486771, now seen corresponding path program 1 times [2020-11-22 12:57:35,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:35,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97493319] [2020-11-22 12:57:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:35,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:35,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327428864] [2020-11-22 12:57:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 12:57:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:35,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 12:57:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:35,262 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 12:57:35,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:35,274 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:35,286 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 12:57:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97493319] [2020-11-22 12:57:35,287 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:35,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327428864] [2020-11-22 12:57:35,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:35,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:57:35,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069273047] [2020-11-22 12:57:35,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:57:35,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:35,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:57:35,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:57:35,289 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-11-22 12:57:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:35,443 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-11-22 12:57:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:57:35,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-22 12:57:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:35,448 INFO L225 Difference]: With dead ends: 92 [2020-11-22 12:57:35,449 INFO L226 Difference]: Without dead ends: 84 [2020-11-22 12:57:35,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:57:35,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-22 12:57:35,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 72. [2020-11-22 12:57:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-22 12:57:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-11-22 12:57:35,469 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 7 [2020-11-22 12:57:35,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:35,469 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-11-22 12:57:35,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:57:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-11-22 12:57:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 12:57:35,470 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:35,470 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:35,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:35,697 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash -608980738, now seen corresponding path program 1 times [2020-11-22 12:57:35,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:35,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549082356] [2020-11-22 12:57:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:35,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:35,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527452191] [2020-11-22 12:57:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 12:57:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:35,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:57:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:35,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:35,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549082356] [2020-11-22 12:57:35,870 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:35,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527452191] [2020-11-22 12:57:35,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:35,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-22 12:57:35,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028159573] [2020-11-22 12:57:35,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 12:57:35,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 12:57:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:57:35,875 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 8 states. [2020-11-22 12:57:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:35,974 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-11-22 12:57:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 12:57:35,974 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-22 12:57:35,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:35,977 INFO L225 Difference]: With dead ends: 156 [2020-11-22 12:57:35,977 INFO L226 Difference]: Without dead ends: 110 [2020-11-22 12:57:35,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:57:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-22 12:57:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-11-22 12:57:36,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-22 12:57:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-11-22 12:57:36,014 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 15 [2020-11-22 12:57:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:36,014 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-11-22 12:57:36,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 12:57:36,020 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-11-22 12:57:36,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-22 12:57:36,020 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:36,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:36,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:36,221 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash -126968315, now seen corresponding path program 1 times [2020-11-22 12:57:36,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:36,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145834261] [2020-11-22 12:57:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:36,234 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:36,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580280045] [2020-11-22 12:57:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 12:57:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:36,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 12:57:36,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:36,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:57:36,352 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 12:57:36,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:36,363 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:36,395 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 12:57:36,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145834261] [2020-11-22 12:57:36,396 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:36,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580280045] [2020-11-22 12:57:36,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:57:36,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-22 12:57:36,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653766113] [2020-11-22 12:57:36,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 12:57:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:36,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 12:57:36,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:57:36,398 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 7 states. [2020-11-22 12:57:36,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:36,523 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-11-22 12:57:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:57:36,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-22 12:57:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:36,524 INFO L225 Difference]: With dead ends: 101 [2020-11-22 12:57:36,525 INFO L226 Difference]: Without dead ends: 99 [2020-11-22 12:57:36,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:57:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-22 12:57:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2020-11-22 12:57:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-11-22 12:57:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2020-11-22 12:57:36,545 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 15 [2020-11-22 12:57:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:36,547 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2020-11-22 12:57:36,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 12:57:36,547 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2020-11-22 12:57:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 12:57:36,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:36,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:36,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-22 12:57:36,765 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:36,765 INFO L82 PathProgramCache]: Analyzing trace with hash -14347308, now seen corresponding path program 1 times [2020-11-22 12:57:36,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:36,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878530078] [2020-11-22 12:57:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:36,776 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:36,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193754200] [2020-11-22 12:57:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/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 12:57:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:36,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-22 12:57:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:36,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:57:36,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:57:36,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:36,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:36,915 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:57:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:57:36,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878530078] [2020-11-22 12:57:36,945 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:36,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193754200] [2020-11-22 12:57:36,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37940916] [2020-11-22 12:57:36,971 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2020-11-22 12:57:36,971 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:57:36,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:57:36,987 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:57:36,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:57:37,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:37,996 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:57:38,275 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-11-22 12:57:38,636 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-22 12:57:38,966 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-11-22 12:57:39,368 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-11-22 12:57:40,076 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-11-22 12:57:40,549 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-11-22 12:57:41,507 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2020-11-22 12:57:42,094 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-11-22 12:57:42,772 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-11-22 12:57:43,540 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 61 [2020-11-22 12:57:44,316 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-11-22 12:57:44,662 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-11-22 12:57:44,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:44,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:57:44,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-22 12:57:44,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827169319] [2020-11-22 12:57:44,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-22 12:57:44,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:44,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-22 12:57:44,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-22 12:57:44,666 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 7 states. [2020-11-22 12:57:45,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:45,094 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2020-11-22 12:57:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:57:45,096 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-22 12:57:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:45,097 INFO L225 Difference]: With dead ends: 137 [2020-11-22 12:57:45,097 INFO L226 Difference]: Without dead ends: 131 [2020-11-22 12:57:45,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2020-11-22 12:57:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-22 12:57:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 73. [2020-11-22 12:57:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-22 12:57:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-11-22 12:57:45,111 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 21 [2020-11-22 12:57:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:45,111 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-11-22 12:57:45,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-22 12:57:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-11-22 12:57:45,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-22 12:57:45,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:45,115 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:45,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:45,342 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1677668213, now seen corresponding path program 1 times [2020-11-22 12:57:45,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:45,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483528258] [2020-11-22 12:57:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:45,356 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:45,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982269599] [2020-11-22 12:57:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 12:57:45,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:45,452 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 12:57:45,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:45,507 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 12:57:45,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483528258] [2020-11-22 12:57:45,507 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:45,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982269599] [2020-11-22 12:57:45,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1160514473] [2020-11-22 12:57:45,510 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-22 12:57:45,510 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:57:45,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:57:45,510 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:57:45,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:57:45,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:46,110 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:57:46,422 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-11-22 12:57:46,983 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2020-11-22 12:57:47,144 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-11-22 12:57:47,441 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-22 12:57:47,718 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-22 12:57:48,022 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-11-22 12:57:48,346 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-11-22 12:57:49,548 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2020-11-22 12:57:49,805 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 12:57:49,805 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:49,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:57:49,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-22 12:57:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378266893] [2020-11-22 12:57:49,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 12:57:49,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:49,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 12:57:49,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-22 12:57:49,807 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 10 states. [2020-11-22 12:57:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:50,032 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2020-11-22 12:57:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-22 12:57:50,033 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-11-22 12:57:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:50,034 INFO L225 Difference]: With dead ends: 154 [2020-11-22 12:57:50,034 INFO L226 Difference]: Without dead ends: 150 [2020-11-22 12:57:50,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2020-11-22 12:57:50,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-11-22 12:57:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 115. [2020-11-22 12:57:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-22 12:57:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2020-11-22 12:57:50,049 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 21 [2020-11-22 12:57:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:50,049 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2020-11-22 12:57:50,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 12:57:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2020-11-22 12:57:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-22 12:57:50,050 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:57:50,051 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:57:50,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:50,270 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:57:50,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:57:50,270 INFO L82 PathProgramCache]: Analyzing trace with hash -468999629, now seen corresponding path program 1 times [2020-11-22 12:57:50,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:57:50,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672254963] [2020-11-22 12:57:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:57:50,279 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:57:50,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787457466] [2020-11-22 12:57:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:57:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:57:50,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-22 12:57:50,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:57:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:50,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:57:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:57:50,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672254963] [2020-11-22 12:57:50,442 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:50,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787457466] [2020-11-22 12:57:50,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836520686] [2020-11-22 12:57:50,445 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2020-11-22 12:57:50,445 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:57:50,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:57:50,446 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:57:50,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:57:50,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:57:50,898 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:57:51,154 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-11-22 12:57:51,749 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2020-11-22 12:57:51,924 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-22 12:57:52,192 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-11-22 12:57:52,491 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-11-22 12:57:53,184 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-11-22 12:57:53,510 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-11-22 12:57:54,528 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:57:54,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:57:54,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-11-22 12:57:54,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124452547] [2020-11-22 12:57:54,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 12:57:54,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:57:54,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 12:57:54,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-22 12:57:54,530 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand 8 states. [2020-11-22 12:57:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:57:54,532 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2020-11-22 12:57:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:57:54,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-11-22 12:57:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:57:54,533 INFO L225 Difference]: With dead ends: 115 [2020-11-22 12:57:54,533 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:57:54,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-11-22 12:57:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:57:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:57:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:57:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:57:54,535 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2020-11-22 12:57:54,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:57:54,535 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:57:54,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 12:57:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:57:54,536 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:57:54,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-22 12:57:54,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:57:54,768 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:57:54,768 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:57:54,768 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:57:54,768 INFO L274 CegarLoopResult]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2020-11-22 12:57:54,768 INFO L270 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: false [2020-11-22 12:57:54,768 INFO L274 CegarLoopResult]: For program point L37-4(lines 37 61) no Hoare annotation was computed. [2020-11-22 12:57:54,768 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:57:54,768 INFO L274 CegarLoopResult]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L270 CegarLoopResult]: At program point L46-3(lines 46 58) the Hoare annotation is: false [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L270 CegarLoopResult]: At program point L15-1(lines 14 20) the Hoare annotation is: false [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L270 CegarLoopResult]: At program point L15-3(lines 41 42) the Hoare annotation is: false [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point L15-4(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L270 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: false [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:57:54,769 INFO L270 CegarLoopResult]: At program point L15-7(lines 14 20) the Hoare annotation is: false [2020-11-22 12:57:54,769 INFO L274 CegarLoopResult]: For program point L15-8(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L270 CegarLoopResult]: At program point L15-9(lines 51 52) the Hoare annotation is: false [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L15-10(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L270 CegarLoopResult]: At program point L15-11(lines 14 20) the Hoare annotation is: false [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L277 CegarLoopResult]: At program point L15-13(lines 14 20) the Hoare annotation is: true [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:57:54,770 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:57:54,771 INFO L274 CegarLoopResult]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:57:54,771 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:57:54,771 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:57:54,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:57:54 BoogieIcfgContainer [2020-11-22 12:57:54,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:57:54,786 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:57:54,786 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:57:54,786 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:57:54,787 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:57:31" (3/4) ... [2020-11-22 12:57:54,789 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:57:54,798 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-22 12:57:54,799 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-22 12:57:54,799 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-22 12:57:54,799 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:57:54,845 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_99aa0e59-71d1-42cb-847a-fb96523c2bb7/bin/utaipan/witness.graphml [2020-11-22 12:57:54,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:57:54,847 INFO L168 Benchmark]: Toolchain (without parser) took 24207.36 ms. Allocated memory was 90.2 MB in the beginning and 192.9 MB in the end (delta: 102.8 MB). Free memory was 56.5 MB in the beginning and 160.7 MB in the end (delta: -104.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:54,847 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:54,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.93 ms. Allocated memory is still 90.2 MB. Free memory was 56.3 MB in the beginning and 67.1 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:54,848 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.78 ms. Allocated memory is still 90.2 MB. Free memory was 67.1 MB in the beginning and 65.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:54,849 INFO L168 Benchmark]: Boogie Preprocessor took 29.09 ms. Allocated memory is still 90.2 MB. Free memory was 65.4 MB in the beginning and 64.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:54,849 INFO L168 Benchmark]: RCFGBuilder took 578.63 ms. Allocated memory is still 90.2 MB. Free memory was 64.2 MB in the beginning and 43.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:54,850 INFO L168 Benchmark]: TraceAbstraction took 23196.78 ms. Allocated memory was 90.2 MB in the beginning and 192.9 MB in the end (delta: 102.8 MB). Free memory was 42.8 MB in the beginning and 163.9 MB in the end (delta: -121.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:57:54,850 INFO L168 Benchmark]: Witness Printer took 59.65 ms. Allocated memory is still 192.9 MB. Free memory was 163.9 MB in the beginning and 160.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:57:54,852 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 65.8 MB in the end (delta: 31.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.93 ms. Allocated memory is still 90.2 MB. Free memory was 56.3 MB in the beginning and 67.1 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.78 ms. Allocated memory is still 90.2 MB. Free memory was 67.1 MB in the beginning and 65.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.09 ms. Allocated memory is still 90.2 MB. Free memory was 65.4 MB in the beginning and 64.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 578.63 ms. Allocated memory is still 90.2 MB. Free memory was 64.2 MB in the beginning and 43.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23196.78 ms. Allocated memory was 90.2 MB in the beginning and 192.9 MB in the end (delta: 102.8 MB). Free memory was 42.8 MB in the beginning and 163.9 MB in the end (delta: -121.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 59.65 ms. Allocated memory is still 192.9 MB. Free memory was 163.9 MB in the beginning and 160.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 36 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.0s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 247 SDtfs, 450 SDslu, 639 SDs, 0 SdLazy, 342 SolverSat, 80 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 295 GetRequests, 181 SyntacticMatches, 21 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 14.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 171 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 10 NumberOfFragments, 9 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 117 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 212 ConstructedInterpolants, 0 QuantifiedInterpolants, 16399 SizeOfPredicates, 41 NumberOfNonLiveVariables, 705 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 17 InterpolantComputations, 11 PerfectInterpolantSequences, 6/24 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 correct! Received shutdown request...