./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/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 9aa4eed507109801754e8007929fb4ed79ffe649 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:58:05,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:58:05,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:58:05,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:58:05,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:58:05,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:58:05,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:58:05,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:58:05,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:58:05,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:58:05,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:58:05,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:58:05,286 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:58:05,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:58:05,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:58:05,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:58:05,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:58:05,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:58:05,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:58:05,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:58:05,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:58:05,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:58:05,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:58:05,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:58:05,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:58:05,325 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:58:05,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:58:05,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:58:05,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:58:05,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:58:05,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:58:05,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:58:05,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:58:05,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:58:05,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:58:05,335 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:58:05,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:58:05,336 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:58:05,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:58:05,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:58:05,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:58:05,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:58:05,378 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:58:05,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:58:05,380 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:58:05,381 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:58:05,381 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:58:05,381 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:58:05,381 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:58:05,381 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:58:05,382 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:58:05,382 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:58:05,383 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:58:05,383 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:58:05,383 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:58:05,384 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:58:05,384 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:58:05,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:58:05,385 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:58:05,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:58:05,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:58:05,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:58:05,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:58:05,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:58:05,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:58:05,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:58:05,386 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:58:05,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:58:05,387 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:58:05,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:58:05,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:58:05,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:58:05,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:58:05,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:58:05,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:58:05,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:58:05,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:58:05,390 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:58:05,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:58:05,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:58:05,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:58:05,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:58:05,392 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_5b67cd8e-e21c-4946-94bc-d8569f3a4904/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aa4eed507109801754e8007929fb4ed79ffe649 [2020-11-22 12:58:05,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:58:05,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:58:05,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:58:05,678 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:58:05,678 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:58:05,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2020-11-22 12:58:05,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/data/e8081585f/d6d4327540cc4f63bc4296695d02afb6/FLAG31b385d20 [2020-11-22 12:58:06,192 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:58:06,192 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound50.c [2020-11-22 12:58:06,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/data/e8081585f/d6d4327540cc4f63bc4296695d02afb6/FLAG31b385d20 [2020-11-22 12:58:06,565 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/data/e8081585f/d6d4327540cc4f63bc4296695d02afb6 [2020-11-22 12:58:06,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:58:06,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:58:06,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:58:06,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:58:06,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:58:06,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50823c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06, skipping insertion in model container [2020-11-22 12:58:06,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:58:06,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:58:06,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:58:06,862 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:58:06,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:58:06,913 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:58:06,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06 WrapperNode [2020-11-22 12:58:06,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:58:06,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:58:06,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:58:06,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:58:06,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:58:06,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:58:06,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:58:06,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:58:06,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... [2020-11-22 12:58:06,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:58:06,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:58:06,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:58:06,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:58:06,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:58:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:58:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:58:07,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:58:07,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:58:07,497 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:58:07,498 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-22 12:58:07,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:07 BoogieIcfgContainer [2020-11-22 12:58:07,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:58:07,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:58:07,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:58:07,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:58:07,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:58:06" (1/3) ... [2020-11-22 12:58:07,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74640ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:58:07, skipping insertion in model container [2020-11-22 12:58:07,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:58:06" (2/3) ... [2020-11-22 12:58:07,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74640ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:58:07, skipping insertion in model container [2020-11-22 12:58:07,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:07" (3/3) ... [2020-11-22 12:58:07,507 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound50.c [2020-11-22 12:58:07,517 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:58:07,521 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 12:58:07,533 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 12:58:07,557 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:58:07,557 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:58:07,557 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:58:07,557 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:58:07,558 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:58:07,558 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:58:07,558 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:58:07,558 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:58:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-22 12:58:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:58:07,575 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:07,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:58:07,577 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash 100358031, now seen corresponding path program 1 times [2020-11-22 12:58:07,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:07,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868821000] [2020-11-22 12:58:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:07,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868821000] [2020-11-22 12:58:07,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:07,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 12:58:07,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541644693] [2020-11-22 12:58:07,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-22 12:58:07,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:07,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-22 12:58:07,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:58:07,736 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-22 12:58:07,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:07,751 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2020-11-22 12:58:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-22 12:58:07,752 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-22 12:58:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:07,760 INFO L225 Difference]: With dead ends: 25 [2020-11-22 12:58:07,760 INFO L226 Difference]: Without dead ends: 11 [2020-11-22 12:58:07,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-22 12:58:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-22 12:58:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-22 12:58:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-22 12:58:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-22 12:58:07,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2020-11-22 12:58:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:07,793 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-22 12:58:07,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-22 12:58:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-22 12:58:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 12:58:07,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:07,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 12:58:07,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:58:07,795 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash 99468274, now seen corresponding path program 1 times [2020-11-22 12:58:07,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:07,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071482219] [2020-11-22 12:58:07,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:07,815 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:07,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626088398] [2020-11-22 12:58:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-22 12:58:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:07,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:08,000 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:58:08,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071482219] [2020-11-22 12:58:08,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:08,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626088398] [2020-11-22 12:58:08,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:08,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:58:08,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857403706] [2020-11-22 12:58:08,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:58:08,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:08,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:58:08,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:58:08,049 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2020-11-22 12:58:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:10,296 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-22 12:58:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:58:10,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-22 12:58:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:10,297 INFO L225 Difference]: With dead ends: 33 [2020-11-22 12:58:10,298 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 12:58:10,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:58:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 12:58:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2020-11-22 12:58:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 12:58:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-11-22 12:58:10,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 5 [2020-11-22 12:58:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:10,304 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-11-22 12:58:10,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:58:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-11-22 12:58:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:58:10,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:10,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:58:10,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-22 12:58:10,515 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:10,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:10,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1211487480, now seen corresponding path program 1 times [2020-11-22 12:58:10,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:10,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526685065] [2020-11-22 12:58:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:10,549 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:10,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460522844] [2020-11-22 12:58:10,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:10,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 12:58:10,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:10,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:10,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526685065] [2020-11-22 12:58:10,636 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:10,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460522844] [2020-11-22 12:58:10,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:10,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 12:58:10,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505502516] [2020-11-22 12:58:10,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:58:10,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:58:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:58:10,639 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2020-11-22 12:58:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:10,692 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-22 12:58:10,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 12:58:10,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-22 12:58:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:10,695 INFO L225 Difference]: With dead ends: 26 [2020-11-22 12:58:10,695 INFO L226 Difference]: Without dead ends: 22 [2020-11-22 12:58:10,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:58:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-22 12:58:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-11-22 12:58:10,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 12:58:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-22 12:58:10,700 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 6 [2020-11-22 12:58:10,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:10,700 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-22 12:58:10,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:58:10,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-22 12:58:10,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 12:58:10,701 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:10,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:58:10,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:10,916 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash -262222527, now seen corresponding path program 1 times [2020-11-22 12:58:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:10,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338115059] [2020-11-22 12:58:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:10,930 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:10,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116952454] [2020-11-22 12:58:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:10,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-22 12:58:10,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:11,050 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-22 12:58:11,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:58:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:11,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:11,170 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:58:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:11,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338115059] [2020-11-22 12:58:11,274 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:11,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116952454] [2020-11-22 12:58:11,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:58:11,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-11-22 12:58:11,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901573360] [2020-11-22 12:58:11,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 12:58:11,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:11,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 12:58:11,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-22 12:58:11,276 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2020-11-22 12:58:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:17,521 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-11-22 12:58:17,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:58:17,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-22 12:58:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:17,522 INFO L225 Difference]: With dead ends: 22 [2020-11-22 12:58:17,522 INFO L226 Difference]: Without dead ends: 18 [2020-11-22 12:58:17,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-22 12:58:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-22 12:58:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-22 12:58:17,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-22 12:58:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-22 12:58:17,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2020-11-22 12:58:17,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:17,528 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-22 12:58:17,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 12:58:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-22 12:58:17,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:58:17,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:17,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2020-11-22 12:58:17,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:17,729 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash 694035666, now seen corresponding path program 1 times [2020-11-22 12:58:17,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:17,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662364689] [2020-11-22 12:58:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:17,743 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:17,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922663043] [2020-11-22 12:58:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:17,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-22 12:58:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:18,025 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-11-22 12:58:18,048 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-22 12:58:18,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:58:18,177 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-11-22 12:58:18,199 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 2, 4, 1] term [2020-11-22 12:58:18,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:58:18,205 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-11-22 12:58:18,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:58:18,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:58:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:18,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:18,284 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:58:18,341 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 4, 1] term [2020-11-22 12:58:18,342 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:58:18,414 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 12:58:18,415 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:58:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-22 12:58:18,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662364689] [2020-11-22 12:58:18,421 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:18,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922663043] [2020-11-22 12:58:18,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012796009] [2020-11-22 12:58:18,441 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-22 12:58:18,442 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:58:18,446 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:58:18,451 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:58:18,451 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:58:18,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:58:19,062 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:58:19,497 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-11-22 12:58:19,686 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:19,846 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-22 12:58:20,348 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 12:58:20,687 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-22 12:58:20,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:20,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:58:20,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-11-22 12:58:20,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037756846] [2020-11-22 12:58:20,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 12:58:20,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 12:58:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-22 12:58:20,690 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-11-22 12:58:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:23,006 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-22 12:58:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-22 12:58:23,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-22 12:58:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:23,008 INFO L225 Difference]: With dead ends: 27 [2020-11-22 12:58:23,009 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 12:58:23,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-22 12:58:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 12:58:23,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 15. [2020-11-22 12:58:23,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 12:58:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-22 12:58:23,014 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-22 12:58:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:23,014 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-22 12:58:23,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 12:58:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-22 12:58:23,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-22 12:58:23,015 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:23,015 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-22 12:58:23,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:23,224 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:23,225 INFO L82 PathProgramCache]: Analyzing trace with hash 40232488, now seen corresponding path program 1 times [2020-11-22 12:58:23,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:23,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724822188] [2020-11-22 12:58:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:23,235 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:23,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075690186] [2020-11-22 12:58:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-22 12:58:23,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:23,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:23,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:23,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724822188] [2020-11-22 12:58:23,417 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:23,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075690186] [2020-11-22 12:58:23,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887645907] [2020-11-22 12:58:23,420 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:58:23,420 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:58:23,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:58:23,421 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:58:23,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:58:23,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:58:23,890 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:58:24,329 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-22 12:58:24,475 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:25,037 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 12:58:25,522 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-22 12:58:25,650 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:25,864 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-22 12:58:25,865 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:25,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:58:25,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-11-22 12:58:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329545703] [2020-11-22 12:58:25,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-22 12:58:25,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:25,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-22 12:58:25,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-22 12:58:25,867 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2020-11-22 12:58:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:26,013 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-11-22 12:58:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-22 12:58:26,013 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-22 12:58:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:26,014 INFO L225 Difference]: With dead ends: 35 [2020-11-22 12:58:26,014 INFO L226 Difference]: Without dead ends: 31 [2020-11-22 12:58:26,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-11-22 12:58:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-22 12:58:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-22 12:58:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-22 12:58:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-11-22 12:58:26,029 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 14 [2020-11-22 12:58:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:26,030 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-11-22 12:58:26,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-22 12:58:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-11-22 12:58:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-22 12:58:26,031 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:26,032 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1] [2020-11-22 12:58:26,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-22 12:58:26,244 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:26,245 INFO L82 PathProgramCache]: Analyzing trace with hash -425329560, now seen corresponding path program 2 times [2020-11-22 12:58:26,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:26,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847540691] [2020-11-22 12:58:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:26,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:26,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391025997] [2020-11-22 12:58:26,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:26,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-22 12:58:26,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:58:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-22 12:58:26,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:26,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:26,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847540691] [2020-11-22 12:58:26,603 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:26,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391025997] [2020-11-22 12:58:26,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882850725] [2020-11-22 12:58:26,605 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:58:26,606 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:58:26,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:58:26,606 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:58:26,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:58:26,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:58:26,948 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:58:27,198 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-22 12:58:27,485 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-22 12:58:28,381 WARN L193 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 12:58:28,683 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-22 12:58:28,859 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:29,113 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-22 12:58:29,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:29,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:58:29,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-11-22 12:58:29,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753949246] [2020-11-22 12:58:29,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-22 12:58:29,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:29,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-22 12:58:29,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2020-11-22 12:58:29,116 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 18 states. [2020-11-22 12:58:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:29,417 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-11-22 12:58:29,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-22 12:58:29,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2020-11-22 12:58:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:29,420 INFO L225 Difference]: With dead ends: 67 [2020-11-22 12:58:29,420 INFO L226 Difference]: Without dead ends: 63 [2020-11-22 12:58:29,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=367, Invalid=1039, Unknown=0, NotChecked=0, Total=1406 [2020-11-22 12:58:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-22 12:58:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-22 12:58:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-22 12:58:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-11-22 12:58:29,444 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 30 [2020-11-22 12:58:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:29,445 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-11-22 12:58:29,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-22 12:58:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-11-22 12:58:29,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-11-22 12:58:29,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:29,450 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1] [2020-11-22 12:58:29,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:29,664 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:29,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:29,665 INFO L82 PathProgramCache]: Analyzing trace with hash -221730584, now seen corresponding path program 3 times [2020-11-22 12:58:29,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:29,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956904944] [2020-11-22 12:58:29,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:29,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:29,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452181984] [2020-11-22 12:58:29,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:29,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-22 12:58:29,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 12:58:29,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-22 12:58:29,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:30,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:30,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956904944] [2020-11-22 12:58:30,525 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:30,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452181984] [2020-11-22 12:58:30,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963433902] [2020-11-22 12:58:30,527 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:58:30,527 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:58:30,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:58:30,528 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:58:30,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:58:30,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:58:30,907 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:58:31,149 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-22 12:58:31,326 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:31,484 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-11-22 12:58:31,985 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 12:58:32,612 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-22 12:58:32,927 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:33,105 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-22 12:58:33,105 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:33,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:58:33,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2020-11-22 12:58:33,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776317624] [2020-11-22 12:58:33,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-22 12:58:33,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-22 12:58:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1112, Unknown=0, NotChecked=0, Total=1640 [2020-11-22 12:58:33,108 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 34 states. [2020-11-22 12:58:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:33,877 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2020-11-22 12:58:33,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-22 12:58:33,878 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 62 [2020-11-22 12:58:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:33,879 INFO L225 Difference]: With dead ends: 131 [2020-11-22 12:58:33,879 INFO L226 Difference]: Without dead ends: 127 [2020-11-22 12:58:33,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1471, Invalid=3359, Unknown=0, NotChecked=0, Total=4830 [2020-11-22 12:58:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-11-22 12:58:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-11-22 12:58:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-22 12:58:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-11-22 12:58:33,904 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 62 [2020-11-22 12:58:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:33,914 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-11-22 12:58:33,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-22 12:58:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-11-22 12:58:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-11-22 12:58:33,919 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:33,919 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1] [2020-11-22 12:58:34,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:34,126 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1436025320, now seen corresponding path program 4 times [2020-11-22 12:58:34,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:34,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941298] [2020-11-22 12:58:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:34,145 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:34,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365668334] [2020-11-22 12:58:34,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:58:34,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 63 conjunts are in the unsatisfiable core [2020-11-22 12:58:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:58:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:34,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:58:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:58:36,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941298] [2020-11-22 12:58:36,028 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:36,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365668334] [2020-11-22 12:58:36,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887207623] [2020-11-22 12:58:36,031 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-22 12:58:36,031 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:58:36,032 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:58:36,032 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:58:36,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:58:36,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:58:36,347 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:58:36,591 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-22 12:58:36,734 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:37,154 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-22 12:58:37,457 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-11-22 12:58:37,686 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2020-11-22 12:58:37,961 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-11-22 12:58:37,961 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:58:37,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:58:37,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 53 [2020-11-22 12:58:37,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617660064] [2020-11-22 12:58:37,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-11-22 12:58:37,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:58:37,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-11-22 12:58:37,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1358, Invalid=2302, Unknown=0, NotChecked=0, Total=3660 [2020-11-22 12:58:37,964 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 54 states. [2020-11-22 12:58:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:58:39,980 INFO L93 Difference]: Finished difference Result 211 states and 230 transitions. [2020-11-22 12:58:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-22 12:58:39,980 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 126 [2020-11-22 12:58:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:58:39,983 INFO L225 Difference]: With dead ends: 211 [2020-11-22 12:58:39,983 INFO L226 Difference]: Without dead ends: 207 [2020-11-22 12:58:39,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3937, Invalid=8053, Unknown=0, NotChecked=0, Total=11990 [2020-11-22 12:58:39,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-11-22 12:58:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-11-22 12:58:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-11-22 12:58:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-11-22 12:58:40,020 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 126 [2020-11-22 12:58:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:58:40,021 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-11-22 12:58:40,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-11-22 12:58:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-11-22 12:58:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-11-22 12:58:40,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:58:40,025 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1] [2020-11-22 12:58:40,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-11-22 12:58:40,240 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:58:40,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:58:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash 459141416, now seen corresponding path program 5 times [2020-11-22 12:58:40,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:58:40,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994777481] [2020-11-22 12:58:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:58:40,268 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:58:40,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707296446] [2020-11-22 12:58:40,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/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 [2020-11-22 12:58:40,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2020-11-22 12:58:40,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-22 12:58:40,908 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:58:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:58:41,032 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:58:41,251 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:58:41,252 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:58:41,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:58:41,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:58:41 BoogieIcfgContainer [2020-11-22 12:58:41,618 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:58:41,618 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:58:41,619 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:58:41,619 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:58:41,619 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:58:07" (3/4) ... [2020-11-22 12:58:41,621 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:58:41,740 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5b67cd8e-e21c-4946-94bc-d8569f3a4904/bin/utaipan/witness.graphml [2020-11-22 12:58:41,740 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:58:41,741 INFO L168 Benchmark]: Toolchain (without parser) took 35171.93 ms. Allocated memory was 123.7 MB in the beginning and 272.6 MB in the end (delta: 148.9 MB). Free memory was 88.3 MB in the beginning and 88.6 MB in the end (delta: -328.4 kB). Peak memory consumption was 148.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:41,741 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 123.7 MB. Free memory was 95.1 MB in the beginning and 95.1 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:41,742 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.43 ms. Allocated memory is still 123.7 MB. Free memory was 88.1 MB in the beginning and 98.4 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:41,742 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.20 ms. Allocated memory is still 123.7 MB. Free memory was 98.4 MB in the beginning and 97.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:41,742 INFO L168 Benchmark]: Boogie Preprocessor took 31.11 ms. Allocated memory is still 123.7 MB. Free memory was 97.0 MB in the beginning and 96.3 MB in the end (delta: 635.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:58:41,743 INFO L168 Benchmark]: RCFGBuilder took 509.59 ms. Allocated memory is still 123.7 MB. Free memory was 96.2 MB in the beginning and 76.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:41,743 INFO L168 Benchmark]: TraceAbstraction took 34116.07 ms. Allocated memory was 123.7 MB in the beginning and 272.6 MB in the end (delta: 148.9 MB). Free memory was 75.4 MB in the beginning and 104.4 MB in the end (delta: -29.0 MB). Peak memory consumption was 121.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:41,744 INFO L168 Benchmark]: Witness Printer took 121.75 ms. Allocated memory is still 272.6 MB. Free memory was 104.4 MB in the beginning and 88.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:58:41,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 123.7 MB. Free memory was 95.1 MB in the beginning and 95.1 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 340.43 ms. Allocated memory is still 123.7 MB. Free memory was 88.1 MB in the beginning and 98.4 MB in the end (delta: -10.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.20 ms. Allocated memory is still 123.7 MB. Free memory was 98.4 MB in the beginning and 97.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.11 ms. Allocated memory is still 123.7 MB. Free memory was 97.0 MB in the beginning and 96.3 MB in the end (delta: 635.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 509.59 ms. Allocated memory is still 123.7 MB. Free memory was 96.2 MB in the beginning and 76.0 MB in the end (delta: 20.2 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34116.07 ms. Allocated memory was 123.7 MB in the beginning and 272.6 MB in the end (delta: 148.9 MB). Free memory was 75.4 MB in the beginning and 104.4 MB in the end (delta: -29.0 MB). Peak memory consumption was 121.8 MB. Max. memory is 16.1 GB. * Witness Printer took 121.75 ms. Allocated memory is still 272.6 MB. Free memory was 104.4 MB in the beginning and 88.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) [L13] COND FALSE !(!cond) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=21] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=21] [L36] EXPR counter++ VAL [counter=22] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=22] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=22] [L36] EXPR counter++ VAL [counter=23] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=23] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=23] [L36] EXPR counter++ VAL [counter=24] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=24] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=24] [L36] EXPR counter++ VAL [counter=25] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=25] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=25] [L36] EXPR counter++ VAL [counter=26] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=26] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=26] [L36] EXPR counter++ VAL [counter=27] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=27] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=27] [L36] EXPR counter++ VAL [counter=28] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=28] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=28] [L36] EXPR counter++ VAL [counter=29] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=29] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=29] [L36] EXPR counter++ VAL [counter=30] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=30] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=30] [L36] EXPR counter++ VAL [counter=31] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=31] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=31] [L36] EXPR counter++ VAL [counter=32] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=32] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=32] [L36] EXPR counter++ VAL [counter=33] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=33] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=33] [L36] EXPR counter++ VAL [counter=34] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=34] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=34] [L36] EXPR counter++ VAL [counter=35] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=35] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=35] [L36] EXPR counter++ VAL [counter=36] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=36] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=36] [L36] EXPR counter++ VAL [counter=37] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=37] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=37] [L36] EXPR counter++ VAL [counter=38] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=38] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=38] [L36] EXPR counter++ VAL [counter=39] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=39] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=39] [L36] EXPR counter++ VAL [counter=40] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=40] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=40] [L36] EXPR counter++ VAL [counter=41] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=41] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=41] [L36] EXPR counter++ VAL [counter=42] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=42] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=42] [L36] EXPR counter++ VAL [counter=43] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=43] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=43] [L36] EXPR counter++ VAL [counter=44] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=44] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=44] [L36] EXPR counter++ VAL [counter=45] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=45] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=45] [L36] EXPR counter++ VAL [counter=46] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=46] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=46] [L36] EXPR counter++ VAL [counter=47] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=47] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=47] [L36] EXPR counter++ VAL [counter=48] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=48] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=48] [L36] EXPR counter++ VAL [counter=49] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=49] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=49] [L36] EXPR counter++ VAL [counter=50] [L36] COND TRUE counter++<50 [L16] COND FALSE !(!(cond)) VAL [counter=50] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=50] [L36] EXPR counter++ VAL [counter=51] [L36] COND FALSE !(counter++<50) [L16] COND TRUE !(cond) VAL [counter=51] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=51] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 33.9s, OverallIterations: 10, TraceHistogramMax: 51, AutomataDifference: 14.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 127 SDslu, 366 SDs, 0 SdLazy, 327 SolverSat, 94 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 10.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 865 GetRequests, 594 SyntacticMatches, 6 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3651 ImplicationChecksByTransitivity, 15.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 27 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 475 NumberOfCodeBlocks, 475 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 516 ConstructedInterpolants, 0 QuantifiedInterpolants, 124295 SizeOfPredicates, 86 NumberOfNonLiveVariables, 1143 ConjunctsInSsa, 164 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 9/4564 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...