./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.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_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1cc9cf79891afa42e51c5a84218adbd4a63e1151 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-28 03:05:19,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:05:19,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:05:19,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:05:19,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:05:19,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:05:19,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:05:19,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:05:19,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:05:19,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:05:19,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:05:19,263 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:05:19,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:05:19,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:05:19,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:05:19,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:05:19,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:05:19,270 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:05:19,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:05:19,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:05:19,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:05:19,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:05:19,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:05:19,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:05:19,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:05:19,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:05:19,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:05:19,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:05:19,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:05:19,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:05:19,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:05:19,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:05:19,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:05:19,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:05:19,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:05:19,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:05:19,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:05:19,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:05:19,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:05:19,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:05:19,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:05:19,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:05:19,332 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:05:19,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:05:19,334 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:05:19,334 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:05:19,334 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:05:19,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:05:19,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:05:19,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:05:19,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:05:19,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:05:19,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:05:19,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:05:19,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:05:19,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:05:19,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:05:19,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:05:19,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:05:19,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:05:19,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:05:19,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:05:19,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:05:19,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:05:19,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:05:19,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:05:19,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:05:19,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:05:19,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:05:19,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:05:19,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:05:19,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cc9cf79891afa42e51c5a84218adbd4a63e1151 [2020-11-28 03:05:19,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:05:19,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:05:19,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:05:19,665 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:05:19,666 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:05:19,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-11-28 03:05:19,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/data/f9b5c5037/5afb5c3b38364ff1a646f8196e6b16c9/FLAGda31887f0 [2020-11-28 03:05:20,286 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:05:20,287 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound5.c [2020-11-28 03:05:20,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/data/f9b5c5037/5afb5c3b38364ff1a646f8196e6b16c9/FLAGda31887f0 [2020-11-28 03:05:20,667 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/data/f9b5c5037/5afb5c3b38364ff1a646f8196e6b16c9 [2020-11-28 03:05:20,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:05:20,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:05:20,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:20,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:05:20,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:05:20,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:20,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78ec9c4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20, skipping insertion in model container [2020-11-28 03:05:20,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:20,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:05:20,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:05:20,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:20,920 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:05:20,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:05:20,976 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:05:20,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20 WrapperNode [2020-11-28 03:05:20,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:05:20,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:20,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:05:20,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:05:20,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:05:21,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:05:21,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:05:21,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:05:21,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... [2020-11-28 03:05:21,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:05:21,061 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:05:21,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:05:21,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:05:21,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:21,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:05:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:05:21,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:05:21,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:05:21,366 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:05:21,366 INFO L298 CfgBuilder]: Removed 17 assume(true) statements. [2020-11-28 03:05:21,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:21 BoogieIcfgContainer [2020-11-28 03:05:21,368 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:05:21,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:05:21,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:05:21,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:05:21,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:05:20" (1/3) ... [2020-11-28 03:05:21,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c67635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:21, skipping insertion in model container [2020-11-28 03:05:21,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:05:20" (2/3) ... [2020-11-28 03:05:21,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c67635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:05:21, skipping insertion in model container [2020-11-28 03:05:21,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:21" (3/3) ... [2020-11-28 03:05:21,398 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound5.c [2020-11-28 03:05:21,409 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:05:21,413 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:05:21,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:05:21,452 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:05:21,452 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:05:21,452 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:05:21,453 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:05:21,453 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:05:21,453 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:05:21,453 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:05:21,453 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:05:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-11-28 03:05:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:05:21,474 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:21,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:21,475 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:21,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1235309937, now seen corresponding path program 1 times [2020-11-28 03:05:21,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:21,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13444052] [2020-11-28 03:05:21,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:21,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13444052] [2020-11-28 03:05:21,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:21,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:05:21,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566231738] [2020-11-28 03:05:21,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:05:21,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:21,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:05:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:05:21,676 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-11-28 03:05:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:21,692 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-11-28 03:05:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:05:21,693 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-28 03:05:21,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:21,703 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:05:21,704 INFO L226 Difference]: Without dead ends: 17 [2020-11-28 03:05:21,707 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 [2020-11-28 03:05:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-28 03:05:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-28 03:05:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:05:21,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-28 03:05:21,746 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-11-28 03:05:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:21,746 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-28 03:05:21,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:05:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-28 03:05:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 03:05:21,747 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:21,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:21,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:05:21,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:21,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:21,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-11-28 03:05:21,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:21,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091294543] [2020-11-28 03:05:21,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:21,776 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:21,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339269174] [2020-11-28 03:05:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:21,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:05:21,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:22,059 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:05:22,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:22,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091294543] [2020-11-28 03:05:22,156 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:22,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339269174] [2020-11-28 03:05:22,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:22,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:05:22,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150335683] [2020-11-28 03:05:22,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:05:22,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:22,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:05:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:05:22,164 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 6 states. [2020-11-28 03:05:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:22,446 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-11-28 03:05:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:05:22,447 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-28 03:05:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:22,448 INFO L225 Difference]: With dead ends: 32 [2020-11-28 03:05:22,448 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:05:22,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:05:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:05:22,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-11-28 03:05:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:05:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 03:05:22,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-11-28 03:05:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:22,458 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 03:05:22,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:05:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 03:05:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:05:22,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:22,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:22,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 03:05:22,680 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:22,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:22,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1507423092, now seen corresponding path program 1 times [2020-11-28 03:05:22,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:22,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234262214] [2020-11-28 03:05:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:22,714 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:22,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510723599] [2020-11-28 03:05:22,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:22,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:05:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:22,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234262214] [2020-11-28 03:05:22,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:22,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510723599] [2020-11-28 03:05:22,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:22,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:05:22,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890322003] [2020-11-28 03:05:22,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:05:22,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:22,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:05:22,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:05:22,818 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-11-28 03:05:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:22,850 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-28 03:05:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:05:22,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:05:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:22,852 INFO L225 Difference]: With dead ends: 24 [2020-11-28 03:05:22,852 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 03:05:22,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:05:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 03:05:22,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 03:05:22,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:05:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-28 03:05:22,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-11-28 03:05:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:22,858 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-28 03:05:22,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:05:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-28 03:05:22,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 03:05:22,859 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:22,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:23,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:23,063 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:23,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1188504123, now seen corresponding path program 1 times [2020-11-28 03:05:23,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:23,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776511774] [2020-11-28 03:05:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:23,083 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:23,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1696688507] [2020-11-28 03:05:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:23,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:05:23,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:23,223 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 03:05:23,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:05:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:23,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776511774] [2020-11-28 03:05:23,348 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:23,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696688507] [2020-11-28 03:05:23,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:05:23,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:05:23,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909721565] [2020-11-28 03:05:23,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:05:23,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:23,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:05:23,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:05:23,351 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 6 states. [2020-11-28 03:05:25,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:25,650 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-11-28 03:05:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:05:25,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-28 03:05:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:25,652 INFO L225 Difference]: With dead ends: 27 [2020-11-28 03:05:25,652 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 03:05:25,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:05:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 03:05:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-11-28 03:05:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 03:05:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-28 03:05:25,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-11-28 03:05:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:25,658 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-28 03:05:25,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:05:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-28 03:05:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:05:25,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:25,664 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:25,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:25,865 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1768635143, now seen corresponding path program 1 times [2020-11-28 03:05:25,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:25,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766355746] [2020-11-28 03:05:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:25,895 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:25,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427481257] [2020-11-28 03:05:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:05:25,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:05:25,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:26,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766355746] [2020-11-28 03:05:26,026 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:26,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427481257] [2020-11-28 03:05:26,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:26,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-11-28 03:05:26,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517706372] [2020-11-28 03:05:26,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:05:26,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:26,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:05:26,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:05:26,029 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-11-28 03:05:26,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:26,078 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-28 03:05:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:05:26,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 03:05:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:26,080 INFO L225 Difference]: With dead ends: 26 [2020-11-28 03:05:26,080 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 03:05:26,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:05:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 03:05:26,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 03:05:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 03:05:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-11-28 03:05:26,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-11-28 03:05:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:26,087 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-11-28 03:05:26,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:05:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-11-28 03:05:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:05:26,089 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:26,089 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:26,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:26,290 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:26,291 INFO L82 PathProgramCache]: Analyzing trace with hash 71944364, now seen corresponding path program 2 times [2020-11-28 03:05:26,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:26,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957221593] [2020-11-28 03:05:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:26,317 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:26,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633826618] [2020-11-28 03:05:26,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:26,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:05:26,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:05:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:05:26,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:26,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957221593] [2020-11-28 03:05:26,461 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:26,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633826618] [2020-11-28 03:05:26,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:26,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-28 03:05:26,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111875401] [2020-11-28 03:05:26,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:05:26,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:26,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:05:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:05:26,464 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-11-28 03:05:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:26,527 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-11-28 03:05:26,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:05:26,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-28 03:05:26,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:26,529 INFO L225 Difference]: With dead ends: 31 [2020-11-28 03:05:26,529 INFO L226 Difference]: Without dead ends: 27 [2020-11-28 03:05:26,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:05:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-28 03:05:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-28 03:05:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-28 03:05:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-28 03:05:26,535 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-11-28 03:05:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:26,535 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-28 03:05:26,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:05:26,536 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-28 03:05:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 03:05:26,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:26,537 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:26,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:05:26,760 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 800201945, now seen corresponding path program 3 times [2020-11-28 03:05:26,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:26,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361005078] [2020-11-28 03:05:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:26,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:26,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157616461] [2020-11-28 03:05:26,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:26,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-28 03:05:26,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:05:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 03:05:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:26,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361005078] [2020-11-28 03:05:26,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:26,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157616461] [2020-11-28 03:05:26,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:26,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-28 03:05:26,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089848782] [2020-11-28 03:05:26,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:05:26,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:26,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:05:26,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:05:26,967 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-11-28 03:05:27,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:27,039 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-28 03:05:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:05:27,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-11-28 03:05:27,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:27,043 INFO L225 Difference]: With dead ends: 36 [2020-11-28 03:05:27,043 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:05:27,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:05:27,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:05:27,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-28 03:05:27,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-28 03:05:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-11-28 03:05:27,058 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-11-28 03:05:27,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:27,059 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-11-28 03:05:27,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:05:27,059 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-11-28 03:05:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:05:27,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:27,061 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:27,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:27,288 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1993843508, now seen corresponding path program 4 times [2020-11-28 03:05:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:27,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836193640] [2020-11-28 03:05:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:27,307 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:27,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587766259] [2020-11-28 03:05:27,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:27,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 03:05:27,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:05:27,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:05:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:05:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:05:27,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836193640] [2020-11-28 03:05:27,487 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 03:05:27,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587766259] [2020-11-28 03:05:27,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:05:27,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-28 03:05:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763625935] [2020-11-28 03:05:27,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:05:27,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:05:27,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:05:27,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:05:27,489 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-11-28 03:05:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:05:27,602 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-11-28 03:05:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 03:05:27,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-11-28 03:05:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:05:27,605 INFO L225 Difference]: With dead ends: 41 [2020-11-28 03:05:27,605 INFO L226 Difference]: Without dead ends: 37 [2020-11-28 03:05:27,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:05:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-28 03:05:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-11-28 03:05:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-28 03:05:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-11-28 03:05:27,616 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-11-28 03:05:27,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:05:27,616 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-11-28 03:05:27,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:05:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-11-28 03:05:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:05:27,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:05:27,619 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:05:27,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:05:27,820 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:05:27,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:05:27,821 INFO L82 PathProgramCache]: Analyzing trace with hash -915727175, now seen corresponding path program 5 times [2020-11-28 03:05:27,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:05:27,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519955332] [2020-11-28 03:05:27,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:05:27,835 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 03:05:27,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [780653057] [2020-11-28 03:05:27,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/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 [2020-11-28 03:05:27,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-28 03:05:27,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-11-28 03:05:27,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:05:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:05:27,972 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:05:28,016 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:05:28,016 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:05:28,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-28 03:05:28,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:05:28 BoogieIcfgContainer [2020-11-28 03:05:28,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:05:28,323 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:05:28,323 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:05:28,324 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:05:28,324 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:05:21" (3/4) ... [2020-11-28 03:05:28,326 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:05:28,420 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ba9ee7aa-80d8-4ad9-8d31-6709e34629e7/bin/uautomizer/witness.graphml [2020-11-28 03:05:28,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:05:28,422 INFO L168 Benchmark]: Toolchain (without parser) took 7749.82 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 84.5 MB in the beginning and 102.7 MB in the end (delta: -18.2 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:28,422 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory was 67.1 MB in the beginning and 67.0 MB in the end (delta: 49.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:28,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.94 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 86.3 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:28,423 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.12 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 84.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:28,424 INFO L168 Benchmark]: Boogie Preprocessor took 31.51 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:05:28,424 INFO L168 Benchmark]: RCFGBuilder took 306.45 ms. Allocated memory is still 111.1 MB. Free memory was 83.6 MB in the beginning and 70.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:28,425 INFO L168 Benchmark]: TraceAbstraction took 6942.29 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 70.3 MB in the beginning and 106.9 MB in the end (delta: -36.6 MB). Peak memory consumption was 58.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:28,425 INFO L168 Benchmark]: Witness Printer took 96.75 ms. Allocated memory is still 134.2 MB. Free memory was 106.9 MB in the beginning and 102.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:05:28,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory was 67.1 MB in the beginning and 67.0 MB in the end (delta: 49.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 298.94 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 86.3 MB in the end (delta: -2.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.12 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 84.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.51 ms. Allocated memory is still 111.1 MB. Free memory was 84.8 MB in the beginning and 83.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 306.45 ms. Allocated memory is still 111.1 MB. Free memory was 83.6 MB in the beginning and 70.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6942.29 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 70.3 MB in the beginning and 106.9 MB in the end (delta: -36.6 MB). Peak memory consumption was 58.0 MB. Max. memory is 16.1 GB. * Witness Printer took 96.75 ms. Allocated memory is still 134.2 MB. Free memory was 106.9 MB in the beginning and 102.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 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; VAL [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) VAL [counter=0] [L13] COND FALSE !(!cond) VAL [counter=0] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=1] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<5 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) VAL [counter=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND FALSE !(counter++<5) [L16] COND TRUE !(cond) VAL [counter=6] [L9] __assert_fail("0", "mannadiv.c", 9, "reach_error") VAL [counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.7s, OverallIterations: 9, TraceHistogramMax: 6, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 103 SDslu, 229 SDs, 0 SdLazy, 124 SolverSat, 26 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 174 NumberOfCodeBlocks, 174 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 7350 SizeOfPredicates, 28 NumberOfNonLiveVariables, 680 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 0/70 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...