./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:03:14,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:03:14,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:03:14,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:03:14,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:03:14,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:03:14,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:03:14,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:03:14,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:03:14,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:03:14,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:03:14,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:03:14,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:03:14,305 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:03:14,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:03:14,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:03:14,307 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:03:14,308 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:03:14,310 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:03:14,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:03:14,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:03:14,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:03:14,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:03:14,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:03:14,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:03:14,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:03:14,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:03:14,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:03:14,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:03:14,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:03:14,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:03:14,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:03:14,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:03:14,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:03:14,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:03:14,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:03:14,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:03:14,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:03:14,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:03:14,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:03:14,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:03:14,327 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 11:03:14,343 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:03:14,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:03:14,344 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:03:14,344 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:03:14,344 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:03:14,345 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:03:14,345 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:03:14,345 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:03:14,345 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:03:14,345 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:03:14,345 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:03:14,345 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:03:14,345 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:03:14,346 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:03:14,346 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:03:14,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:03:14,346 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:03:14,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:03:14,347 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:03:14,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:03:14,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:03:14,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:03:14,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:03:14,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:03:14,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:03:14,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:03:14,349 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:03:14,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:03:14,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:03:14,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:03:14,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:03:14,349 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_0d611951-6834-4c0a-8648-9652f7556916/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 [2020-12-09 11:03:14,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:03:14,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:03:14,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:03:14,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:03:14,551 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:03:14,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/../../sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-12-09 11:03:14,604 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/data/50be4267e/dc478f1bc11b400891351da274d9380c/FLAGbf476de9b [2020-12-09 11:03:14,998 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:03:14,999 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/sv-benchmarks/c/reducercommutativity/rangesum20.i [2020-12-09 11:03:15,005 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/data/50be4267e/dc478f1bc11b400891351da274d9380c/FLAGbf476de9b [2020-12-09 11:03:15,015 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/data/50be4267e/dc478f1bc11b400891351da274d9380c [2020-12-09 11:03:15,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:03:15,018 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:03:15,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:03:15,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:03:15,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:03:15,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,024 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a8cba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15, skipping insertion in model container [2020-12-09 11:03:15,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:03:15,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:03:15,183 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2020-12-09 11:03:15,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:03:15,191 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:03:15,206 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2020-12-09 11:03:15,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:03:15,218 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:03:15,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15 WrapperNode [2020-12-09 11:03:15,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:03:15,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:03:15,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:03:15,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:03:15,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:03:15,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:03:15,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:03:15,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:03:15,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... [2020-12-09 11:03:15,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:03:15,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:03:15,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:03:15,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:03:15,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:03:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:03:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 11:03:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:03:15,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:03:15,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 11:03:15,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:03:15,880 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:03:15,880 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-09 11:03:15,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:03:15 BoogieIcfgContainer [2020-12-09 11:03:15,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:03:15,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:03:15,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:03:15,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:03:15,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:03:15" (1/3) ... [2020-12-09 11:03:15,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4519e9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:03:15, skipping insertion in model container [2020-12-09 11:03:15,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:03:15" (2/3) ... [2020-12-09 11:03:15,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4519e9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:03:15, skipping insertion in model container [2020-12-09 11:03:15,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:03:15" (3/3) ... [2020-12-09 11:03:15,891 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2020-12-09 11:03:15,904 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:03:15,907 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 11:03:15,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 11:03:15,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:03:15,936 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:03:15,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:03:15,937 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:03:15,937 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:03:15,937 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:03:15,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:03:15,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:03:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 11:03:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 11:03:15,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:15,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:15,950 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:15,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:15,954 INFO L82 PathProgramCache]: Analyzing trace with hash -964703457, now seen corresponding path program 1 times [2020-12-09 11:03:15,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:15,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096530109] [2020-12-09 11:03:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:03:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:03:16,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096530109] [2020-12-09 11:03:16,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:03:16,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:03:16,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371444553] [2020-12-09 11:03:16,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:03:16,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:16,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:03:16,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:03:16,095 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-09 11:03:16,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:16,110 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2020-12-09 11:03:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:03:16,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 11:03:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:16,117 INFO L225 Difference]: With dead ends: 21 [2020-12-09 11:03:16,117 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 11:03:16,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:03:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 11:03:16,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 11:03:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 11:03:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 14 transitions. [2020-12-09 11:03:16,159 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 14 transitions. Word has length 8 [2020-12-09 11:03:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:16,159 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 14 transitions. [2020-12-09 11:03:16,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:03:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 14 transitions. [2020-12-09 11:03:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:03:16,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:16,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:16,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:03:16,160 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2050331539, now seen corresponding path program 1 times [2020-12-09 11:03:16,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:16,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843595266] [2020-12-09 11:03:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:16,182 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:16,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503905326] [2020-12-09 11:03:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:03:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 11:03:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 11:03:16,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 11:03:16,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843595266] [2020-12-09 11:03:16,277 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:16,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503905326] [2020-12-09 11:03:16,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:03:16,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 11:03:16,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977719460] [2020-12-09 11:03:16,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:03:16,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:03:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:03:16,281 INFO L87 Difference]: Start difference. First operand 10 states and 14 transitions. Second operand 4 states. [2020-12-09 11:03:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:16,319 INFO L93 Difference]: Finished difference Result 22 states and 34 transitions. [2020-12-09 11:03:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:03:16,320 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 11:03:16,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:16,320 INFO L225 Difference]: With dead ends: 22 [2020-12-09 11:03:16,320 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 11:03:16,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:03:16,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 11:03:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 11:03:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 11:03:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-12-09 11:03:16,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 9 [2020-12-09 11:03:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:16,325 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-12-09 11:03:16,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:03:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-12-09 11:03:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 11:03:16,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:16,326 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:16,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 11:03:16,527 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -939408813, now seen corresponding path program 1 times [2020-12-09 11:03:16,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:16,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154058239] [2020-12-09 11:03:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:16,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:16,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104733315] [2020-12-09 11:03:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:03:16,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 11:03:16,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 11:03:16,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 11:03:16,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154058239] [2020-12-09 11:03:16,620 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:16,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104733315] [2020-12-09 11:03:16,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:03:16,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 11:03:16,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009879373] [2020-12-09 11:03:16,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:03:16,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:16,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:03:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:03:16,623 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2020-12-09 11:03:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:16,635 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-12-09 11:03:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:03:16,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-09 11:03:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:16,637 INFO L225 Difference]: With dead ends: 24 [2020-12-09 11:03:16,637 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 11:03:16,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:03:16,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 11:03:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 11:03:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 11:03:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-09 11:03:16,642 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 15 [2020-12-09 11:03:16,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:16,642 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-09 11:03:16,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:03:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-09 11:03:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 11:03:16,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:16,643 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:16,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:16,844 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:16,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1226876461, now seen corresponding path program 1 times [2020-12-09 11:03:16,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:16,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629707800] [2020-12-09 11:03:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:16,860 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:16,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [198637624] [2020-12-09 11:03:16,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:03:16,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 11:03:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 11:03:16,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:16,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 11:03:16,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629707800] [2020-12-09 11:03:16,998 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:16,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198637624] [2020-12-09 11:03:16,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406089006] [2020-12-09 11:03:17,018 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:17,018 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:17,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:17,026 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:17,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:17,794 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 149 [2020-12-09 11:03:18,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:18,936 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:19,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:19,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:19,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:19,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:19,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:19,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:19,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,361 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,526 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:20,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:21,098 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:21,388 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-09 11:03:21,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:21,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:21,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-12-09 11:03:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539111657] [2020-12-09 11:03:21,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:03:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:21,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:03:21,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 11:03:21,522 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2020-12-09 11:03:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:21,531 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-12-09 11:03:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:03:21,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-09 11:03:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:21,531 INFO L225 Difference]: With dead ends: 36 [2020-12-09 11:03:21,531 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 11:03:21,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-12-09 11:03:21,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 11:03:21,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 11:03:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 11:03:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-09 11:03:21,534 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 17 [2020-12-09 11:03:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:21,534 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-09 11:03:21,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:03:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-09 11:03:21,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 11:03:21,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:21,535 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:21,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:21,736 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:21,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2012560801, now seen corresponding path program 2 times [2020-12-09 11:03:21,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:21,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391160021] [2020-12-09 11:03:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:21,749 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:21,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267304674] [2020-12-09 11:03:21,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:21,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 11:03:21,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:03:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 11:03:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 11:03:21,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-09 11:03:21,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391160021] [2020-12-09 11:03:21,834 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:21,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267304674] [2020-12-09 11:03:21,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234863534] [2020-12-09 11:03:21,836 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:21,836 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:21,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:21,837 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:21,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:22,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:22,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:22,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:22,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,363 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,693 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:23,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:24,119 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:26,214 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-09 11:03:26,414 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-09 11:03:26,550 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:26,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:26,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-09 11:03:26,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490755960] [2020-12-09 11:03:26,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 11:03:26,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 11:03:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-09 11:03:26,552 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2020-12-09 11:03:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:26,616 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2020-12-09 11:03:26,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 11:03:26,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-09 11:03:26,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:26,617 INFO L225 Difference]: With dead ends: 45 [2020-12-09 11:03:26,617 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 11:03:26,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-09 11:03:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 11:03:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-09 11:03:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 11:03:26,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-09 11:03:26,621 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2020-12-09 11:03:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:26,621 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-09 11:03:26,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 11:03:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-09 11:03:26,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 11:03:26,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:26,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:26,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:26,822 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:26,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1378594271, now seen corresponding path program 3 times [2020-12-09 11:03:26,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:26,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267646318] [2020-12-09 11:03:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:26,834 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:26,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115132284] [2020-12-09 11:03:26,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:26,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 11:03:26,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:03:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 11:03:26,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 11:03:26,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 11:03:26,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267646318] [2020-12-09 11:03:26,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:26,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115132284] [2020-12-09 11:03:26,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1436682281] [2020-12-09 11:03:26,967 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:26,967 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:26,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:26,967 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:26,967 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:27,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:27,888 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:27,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:27,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:27,929 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:27,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:27,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:30,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:30,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:30,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:30,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:30,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:30,539 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:32,945 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-09 11:03:32,946 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:32,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:32,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-09 11:03:32,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038789992] [2020-12-09 11:03:32,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 11:03:32,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 11:03:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-09 11:03:32,947 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 12 states. [2020-12-09 11:03:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:32,966 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2020-12-09 11:03:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 11:03:32,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-12-09 11:03:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:32,967 INFO L225 Difference]: With dead ends: 66 [2020-12-09 11:03:32,967 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 11:03:32,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-09 11:03:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 11:03:32,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-09 11:03:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-09 11:03:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-12-09 11:03:32,971 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 32 [2020-12-09 11:03:32,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:32,971 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-12-09 11:03:32,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 11:03:32,971 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-12-09 11:03:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-09 11:03:32,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:32,972 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:33,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-12-09 11:03:33,173 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -254314145, now seen corresponding path program 4 times [2020-12-09 11:03:33,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:33,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242292528] [2020-12-09 11:03:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:33,187 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:33,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018705859] [2020-12-09 11:03:33,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:03:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 11:03:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 11:03:33,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 11:03:33,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242292528] [2020-12-09 11:03:33,471 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:33,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018705859] [2020-12-09 11:03:33,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [997255066] [2020-12-09 11:03:33,472 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:33,473 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:33,473 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:33,473 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:33,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:34,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,471 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,660 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:34,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:35,061 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:35,520 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:35,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:35,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2020-12-09 11:03:35,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72753171] [2020-12-09 11:03:35,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-09 11:03:35,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:35,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-09 11:03:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2020-12-09 11:03:35,521 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 22 states. [2020-12-09 11:03:35,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:35,545 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-12-09 11:03:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-09 11:03:35,545 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 38 [2020-12-09 11:03:35,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:35,546 INFO L225 Difference]: With dead ends: 76 [2020-12-09 11:03:35,546 INFO L226 Difference]: Without dead ends: 49 [2020-12-09 11:03:35,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2020-12-09 11:03:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-09 11:03:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-09 11:03:35,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 11:03:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-12-09 11:03:35,551 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 38 [2020-12-09 11:03:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:35,551 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-12-09 11:03:35,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-09 11:03:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-12-09 11:03:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-09 11:03:35,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:35,553 INFO L422 BasicCegarLoop]: trace histogram [20, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:35,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:35,753 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:35,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash 688562655, now seen corresponding path program 5 times [2020-12-09 11:03:35,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:35,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277490315] [2020-12-09 11:03:35,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:35,774 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:35,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132457582] [2020-12-09 11:03:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:35,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 11:03:35,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:03:35,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 11:03:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-09 11:03:35,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-09 11:03:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277490315] [2020-12-09 11:03:35,924 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132457582] [2020-12-09 11:03:35,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061284184] [2020-12-09 11:03:35,925 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:35,925 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:35,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:35,926 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:35,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:36,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:36,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:36,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:36,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,234 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,504 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:37,729 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:39,852 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-09 11:03:40,163 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:40,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:40,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-09 11:03:40,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944371725] [2020-12-09 11:03:40,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 11:03:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 11:03:40,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-09 11:03:40,164 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 8 states. [2020-12-09 11:03:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:40,180 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2020-12-09 11:03:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 11:03:40,181 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-12-09 11:03:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:40,182 INFO L225 Difference]: With dead ends: 63 [2020-12-09 11:03:40,182 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 11:03:40,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-09 11:03:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 11:03:40,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-09 11:03:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-09 11:03:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-12-09 11:03:40,186 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 48 [2020-12-09 11:03:40,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:40,186 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-12-09 11:03:40,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 11:03:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-12-09 11:03:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-09 11:03:40,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:40,187 INFO L422 BasicCegarLoop]: trace histogram [20, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:40,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-12-09 11:03:40,387 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1369593121, now seen corresponding path program 6 times [2020-12-09 11:03:40,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:40,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915119583] [2020-12-09 11:03:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:40,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:40,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368517831] [2020-12-09 11:03:40,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/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 [2020-12-09 11:03:40,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 11:03:40,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:03:40,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 11:03:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-09 11:03:40,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-12-09 11:03:40,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915119583] [2020-12-09 11:03:40,683 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:40,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368517831] [2020-12-09 11:03:40,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368465959] [2020-12-09 11:03:40,685 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:40,685 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:40,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:40,685 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:40,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:40,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,135 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,356 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,482 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:41,931 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:42,343 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:42,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:42,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-09 11:03:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471170033] [2020-12-09 11:03:42,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 11:03:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 11:03:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-12-09 11:03:42,345 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2020-12-09 11:03:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:42,480 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2020-12-09 11:03:42,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 11:03:42,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-12-09 11:03:42,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:42,481 INFO L225 Difference]: With dead ends: 101 [2020-12-09 11:03:42,481 INFO L226 Difference]: Without dead ends: 77 [2020-12-09 11:03:42,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-12-09 11:03:42,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-09 11:03:42,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-09 11:03:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-09 11:03:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-12-09 11:03:42,487 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2020-12-09 11:03:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:42,487 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-12-09 11:03:42,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 11:03:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-12-09 11:03:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-09 11:03:42,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:42,488 INFO L422 BasicCegarLoop]: trace histogram [20, 14, 14, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:42,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-12-09 11:03:42,688 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1876591071, now seen corresponding path program 7 times [2020-12-09 11:03:42,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:42,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760522433] [2020-12-09 11:03:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:42,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:42,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150428336] [2020-12-09 11:03:42,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:03:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 11:03:42,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-09 11:03:42,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-12-09 11:03:43,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760522433] [2020-12-09 11:03:43,118 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:43,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150428336] [2020-12-09 11:03:43,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036624026] [2020-12-09 11:03:43,120 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:43,120 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:43,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:43,120 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:43,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:43,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,911 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,945 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:43,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:44,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:44,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:44,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:44,309 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:44,810 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:44,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:44,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 22 [2020-12-09 11:03:44,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261591608] [2020-12-09 11:03:44,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-09 11:03:44,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:44,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-09 11:03:44,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2020-12-09 11:03:44,811 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 22 states. [2020-12-09 11:03:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:44,955 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2020-12-09 11:03:44,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-09 11:03:44,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2020-12-09 11:03:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:44,957 INFO L225 Difference]: With dead ends: 135 [2020-12-09 11:03:44,957 INFO L226 Difference]: Without dead ends: 95 [2020-12-09 11:03:44,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2020-12-09 11:03:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-09 11:03:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-09 11:03:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-09 11:03:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2020-12-09 11:03:44,963 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 76 [2020-12-09 11:03:44,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:44,963 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2020-12-09 11:03:44,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-09 11:03:44,963 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2020-12-09 11:03:44,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-09 11:03:44,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:44,964 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:45,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:45,165 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:45,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:45,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1323095265, now seen corresponding path program 8 times [2020-12-09 11:03:45,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:45,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974764464] [2020-12-09 11:03:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:45,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:45,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919411593] [2020-12-09 11:03:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:45,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 11:03:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:03:45,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 11:03:45,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-12-09 11:03:45,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-12-09 11:03:45,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974764464] [2020-12-09 11:03:45,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:45,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919411593] [2020-12-09 11:03:45,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506504763] [2020-12-09 11:03:45,577 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:45,577 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:45,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:45,577 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:45,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:45,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:46,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:46,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:46,142 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:46,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:48,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:50,892 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:51,023 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:53,177 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-09 11:03:53,375 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-12-09 11:03:53,540 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:53,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:53,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-09 11:03:53,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596953271] [2020-12-09 11:03:53,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 11:03:53,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:53,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 11:03:53,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-12-09 11:03:53,541 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 16 states. [2020-12-09 11:03:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:53,568 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2020-12-09 11:03:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 11:03:53,569 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 94 [2020-12-09 11:03:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:53,570 INFO L225 Difference]: With dead ends: 127 [2020-12-09 11:03:53,570 INFO L226 Difference]: Without dead ends: 103 [2020-12-09 11:03:53,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-12-09 11:03:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-09 11:03:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-12-09 11:03:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-09 11:03:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2020-12-09 11:03:53,576 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 94 [2020-12-09 11:03:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:53,576 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2020-12-09 11:03:53,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 11:03:53,577 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2020-12-09 11:03:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-09 11:03:53,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:53,578 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:53,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2020-12-09 11:03:53,778 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash 455351583, now seen corresponding path program 9 times [2020-12-09 11:03:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:53,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200902365] [2020-12-09 11:03:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:53,797 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:53,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040865847] [2020-12-09 11:03:53,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:03:53,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 11:03:53,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 11:03:53,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 11:03:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:03:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-12-09 11:03:54,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 11:03:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-12-09 11:03:54,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200902365] [2020-12-09 11:03:54,213 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:54,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040865847] [2020-12-09 11:03:54,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166872866] [2020-12-09 11:03:54,214 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 11:03:54,214 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 11:03:54,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 11:03:54,215 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 11:03:54,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 11:03:54,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:54,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:55,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:55,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:55,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 11:03:57,392 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 11:03:57,909 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 11:03:57,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 11:03:57,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 21 [2020-12-09 11:03:57,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893734516] [2020-12-09 11:03:57,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 11:03:57,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:03:57,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 11:03:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-12-09 11:03:57,910 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand 21 states. [2020-12-09 11:03:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:03:57,941 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2020-12-09 11:03:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 11:03:57,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2020-12-09 11:03:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:03:57,942 INFO L225 Difference]: With dead ends: 132 [2020-12-09 11:03:57,942 INFO L226 Difference]: Without dead ends: 108 [2020-12-09 11:03:57,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-12-09 11:03:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-09 11:03:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-12-09 11:03:57,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-09 11:03:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2020-12-09 11:03:57,950 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 102 [2020-12-09 11:03:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:03:57,951 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2020-12-09 11:03:57,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 11:03:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2020-12-09 11:03:57,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-09 11:03:57,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:03:57,953 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:03:58,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2020-12-09 11:03:58,153 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:03:58,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:03:58,153 INFO L82 PathProgramCache]: Analyzing trace with hash -371388541, now seen corresponding path program 10 times [2020-12-09 11:03:58,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:03:58,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326950952] [2020-12-09 11:03:58,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:03:58,176 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 11:03:58,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363719487] [2020-12-09 11:03:58,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 11:04:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:04:03,711 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:04:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:04:11,582 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:04:12,724 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:04:12,725 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:04:12,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2020-12-09 11:04:13,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:04:13 BoogieIcfgContainer [2020-12-09 11:04:13,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:04:13,014 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:04:13,014 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:04:13,014 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:04:13,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:03:15" (3/4) ... [2020-12-09 11:04:13,016 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 11:04:13,106 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0d611951-6834-4c0a-8648-9652f7556916/bin/utaipan/witness.graphml [2020-12-09 11:04:13,106 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:04:13,107 INFO L168 Benchmark]: Toolchain (without parser) took 58088.27 ms. Allocated memory was 119.5 MB in the beginning and 308.3 MB in the end (delta: 188.7 MB). Free memory was 87.0 MB in the beginning and 160.0 MB in the end (delta: -73.1 MB). Peak memory consumption was 116.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:04:13,107 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 119.5 MB. Free memory was 100.7 MB in the beginning and 100.6 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:04:13,107 INFO L168 Benchmark]: CACSL2BoogieTranslator took 199.26 ms. Allocated memory is still 119.5 MB. Free memory was 86.3 MB in the beginning and 95.8 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 11:04:13,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.80 ms. Allocated memory is still 119.5 MB. Free memory was 95.8 MB in the beginning and 93.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:04:13,108 INFO L168 Benchmark]: Boogie Preprocessor took 27.93 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:04:13,108 INFO L168 Benchmark]: RCFGBuilder took 595.74 ms. Allocated memory is still 119.5 MB. Free memory was 92.3 MB in the beginning and 54.0 MB in the end (delta: 38.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:04:13,108 INFO L168 Benchmark]: TraceAbstraction took 57129.68 ms. Allocated memory was 119.5 MB in the beginning and 308.3 MB in the end (delta: 188.7 MB). Free memory was 53.3 MB in the beginning and 171.6 MB in the end (delta: -118.2 MB). Peak memory consumption was 71.0 MB. Max. memory is 16.1 GB. [2020-12-09 11:04:13,109 INFO L168 Benchmark]: Witness Printer took 91.86 ms. Allocated memory is still 308.3 MB. Free memory was 171.6 MB in the beginning and 160.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 11:04:13,110 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 119.5 MB. Free memory was 100.7 MB in the beginning and 100.6 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 199.26 ms. Allocated memory is still 119.5 MB. Free memory was 86.3 MB in the beginning and 95.8 MB in the end (delta: -9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.80 ms. Allocated memory is still 119.5 MB. Free memory was 95.8 MB in the beginning and 93.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.93 ms. Allocated memory is still 119.5 MB. Free memory was 93.9 MB in the beginning and 92.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 595.74 ms. Allocated memory is still 119.5 MB. Free memory was 92.3 MB in the beginning and 54.0 MB in the end (delta: 38.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 57129.68 ms. Allocated memory was 119.5 MB in the beginning and 308.3 MB in the end (delta: 188.7 MB). Free memory was 53.3 MB in the beginning and 171.6 MB in the end (delta: -118.2 MB). Peak memory consumption was 71.0 MB. Max. memory is 16.1 GB. * Witness Printer took 91.86 ms. Allocated memory is still 308.3 MB. Free memory was 171.6 MB in the beginning and 160.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[20]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 20) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<20 -1) [L57] x[20 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 56.9s, OverallIterations: 13, TraceHistogramMax: 20, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 0 SDslu, 247 SDs, 0 SdLazy, 274 SolverSat, 316 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1465 GetRequests, 1290 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 12.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 6.0s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 618 NumberOfCodeBlocks, 530 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 991 ConstructedInterpolants, 0 QuantifiedInterpolants, 82895 SizeOfPredicates, 0 NumberOfNonLiveVariables, 2703 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 23 InterpolantComputations, 5 PerfectInterpolantSequences, 5682/6330 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...