./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.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_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 d2e467e7f7f6c55f410dad37a6e857e419829655 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:40:52,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:40:52,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:40:52,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:40:52,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:40:52,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:40:52,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:40:52,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:40:52,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:40:52,331 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:40:52,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:40:52,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:40:52,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:40:52,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:40:52,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:40:52,339 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:40:52,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:40:52,341 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:40:52,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:40:52,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:40:52,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:40:52,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:40:52,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:40:52,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:40:52,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:40:52,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:40:52,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:40:52,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:40:52,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:40:52,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:40:52,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:40:52,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:40:52,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:40:52,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:40:52,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:40:52,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:40:52,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:40:52,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:40:52,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:40:52,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:40:52,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:40:52,371 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:40:52,411 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:40:52,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:40:52,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:40:52,413 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:40:52,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:40:52,414 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:40:52,414 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:40:52,414 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:40:52,414 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:40:52,415 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:40:52,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:40:52,416 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:40:52,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:40:52,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:40:52,417 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:40:52,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:40:52,418 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:40:52,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:40:52,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:40:52,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:40:52,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:40:52,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:40:52,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:40:52,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:40:52,419 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:40:52,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:40:52,420 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:40:52,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:40:52,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:40:52,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:40:52,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:40:52,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:40:52,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:40:52,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:40:52,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:40:52,422 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:40:52,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:40:52,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:40:52,422 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:40:52,422 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:40:52,423 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_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2e467e7f7f6c55f410dad37a6e857e419829655 [2020-11-28 07:40:52,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:40:52,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:40:52,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:40:52,765 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:40:52,770 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:40:52,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2020-11-28 07:40:52,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/data/e4fe76cd9/e4d627ca829c49ae8ba170f9b8d0fe91/FLAG16e6934ff [2020-11-28 07:40:53,414 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:40:53,414 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound1.c [2020-11-28 07:40:53,423 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/data/e4fe76cd9/e4d627ca829c49ae8ba170f9b8d0fe91/FLAG16e6934ff [2020-11-28 07:40:53,785 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/data/e4fe76cd9/e4d627ca829c49ae8ba170f9b8d0fe91 [2020-11-28 07:40:53,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:40:53,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:40:53,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:53,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:40:53,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:40:53,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:53" (1/1) ... [2020-11-28 07:40:53,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68db5182 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:53, skipping insertion in model container [2020-11-28 07:40:53,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:40:53" (1/1) ... [2020-11-28 07:40:53,806 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:40:53,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:40:54,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:54,098 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:40:54,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:40:54,158 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:40:54,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54 WrapperNode [2020-11-28 07:40:54,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:40:54,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:54,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:40:54,162 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:40:54,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:40:54,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:40:54,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:40:54,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:40:54,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... [2020-11-28 07:40:54,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:40:54,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:40:54,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:40:54,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:40:54,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 [2020-11-28 07:40:54,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:40:54,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2020-11-28 07:40:54,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:40:54,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:40:54,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:40:54,889 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:40:54,889 INFO L298 CfgBuilder]: Removed 49 assume(true) statements. [2020-11-28 07:40:54,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:54 BoogieIcfgContainer [2020-11-28 07:40:54,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:40:54,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:40:54,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:40:54,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:40:54,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:40:53" (1/3) ... [2020-11-28 07:40:54,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f51926c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:54, skipping insertion in model container [2020-11-28 07:40:54,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:40:54" (2/3) ... [2020-11-28 07:40:54,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f51926c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:40:54, skipping insertion in model container [2020-11-28 07:40:54,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:54" (3/3) ... [2020-11-28 07:40:54,900 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound1.c [2020-11-28 07:40:54,911 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:40:54,916 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-28 07:40:54,928 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-28 07:40:54,953 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:40:54,953 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:40:54,953 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:40:54,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:40:54,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:40:54,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:40:54,954 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:40:54,954 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:40:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-11-28 07:40:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:40:54,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:54,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:40:54,976 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:54,981 INFO L82 PathProgramCache]: Analyzing trace with hash 172918978, now seen corresponding path program 1 times [2020-11-28 07:40:54,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:54,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843876605] [2020-11-28 07:40:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:55,213 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 07:40:55,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843876605] [2020-11-28 07:40:55,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:55,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:40:55,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059749938] [2020-11-28 07:40:55,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:55,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:55,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:55,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:55,241 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 4 states. [2020-11-28 07:40:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:55,496 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2020-11-28 07:40:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:55,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:40:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:55,516 INFO L225 Difference]: With dead ends: 96 [2020-11-28 07:40:55,520 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 07:40:55,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:40:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 07:40:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-11-28 07:40:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 07:40:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-11-28 07:40:55,578 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 5 [2020-11-28 07:40:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:55,579 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-11-28 07:40:55,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-11-28 07:40:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:40:55,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:55,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:55,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:40:55,582 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1328400347, now seen corresponding path program 1 times [2020-11-28 07:40:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:55,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105339109] [2020-11-28 07:40:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:55,623 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:40:55,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535947154] [2020-11-28 07:40:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 [2020-11-28 07:40:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:40:55,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:55,769 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 07:40:55,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:55,792 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:40:55,812 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 07:40:55,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105339109] [2020-11-28 07:40:55,813 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:40:55,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535947154] [2020-11-28 07:40:55,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:55,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:40:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680259016] [2020-11-28 07:40:55,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:40:55,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:55,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:40:55,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:40:55,816 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 5 states. [2020-11-28 07:40:56,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:56,049 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-11-28 07:40:56,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:56,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-28 07:40:56,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:56,052 INFO L225 Difference]: With dead ends: 85 [2020-11-28 07:40:56,052 INFO L226 Difference]: Without dead ends: 83 [2020-11-28 07:40:56,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:40:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-28 07:40:56,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 48. [2020-11-28 07:40:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 07:40:56,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-11-28 07:40:56,074 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 7 [2020-11-28 07:40:56,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:56,075 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-11-28 07:40:56,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:40:56,075 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-11-28 07:40:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:40:56,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:56,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:56,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-28 07:40:56,276 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1768492663, now seen corresponding path program 1 times [2020-11-28 07:40:56,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:56,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677276472] [2020-11-28 07:40:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:56,291 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:40:56,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028621739] [2020-11-28 07:40:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 [2020-11-28 07:40:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:40:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:56,377 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 07:40:56,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:56,389 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 07:40:56,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677276472] [2020-11-28 07:40:56,390 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:40:56,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028621739] [2020-11-28 07:40:56,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:56,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:40:56,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522482276] [2020-11-28 07:40:56,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:40:56,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:56,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:40:56,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:40:56,392 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 4 states. [2020-11-28 07:40:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:56,440 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-11-28 07:40:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:56,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 07:40:56,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:56,442 INFO L225 Difference]: With dead ends: 70 [2020-11-28 07:40:56,442 INFO L226 Difference]: Without dead ends: 48 [2020-11-28 07:40:56,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 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 07:40:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-28 07:40:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-11-28 07:40:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 07:40:56,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-11-28 07:40:56,451 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 8 [2020-11-28 07:40:56,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:56,452 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-11-28 07:40:56,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:40:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-11-28 07:40:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:40:56,453 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:56,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:56,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:56,669 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:56,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:56,669 INFO L82 PathProgramCache]: Analyzing trace with hash -987259832, now seen corresponding path program 1 times [2020-11-28 07:40:56,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:56,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448798377] [2020-11-28 07:40:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:56,684 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:40:56,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285399161] [2020-11-28 07:40:56,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 [2020-11-28 07:40:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:56,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:40:56,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:56,784 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 07:40:56,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:56,798 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:40:56,817 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 07:40:56,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448798377] [2020-11-28 07:40:56,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:40:56,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285399161] [2020-11-28 07:40:56,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:56,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:40:56,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905761575] [2020-11-28 07:40:56,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:40:56,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:56,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:40:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:40:56,821 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 5 states. [2020-11-28 07:40:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:57,013 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-11-28 07:40:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:40:57,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-28 07:40:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:57,015 INFO L225 Difference]: With dead ends: 83 [2020-11-28 07:40:57,015 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 07:40:57,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:40:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 07:40:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2020-11-28 07:40:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 07:40:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-11-28 07:40:57,035 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 9 [2020-11-28 07:40:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:57,035 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-11-28 07:40:57,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:40:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-11-28 07:40:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:40:57,037 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:57,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:57,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:57,238 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash 431260971, now seen corresponding path program 1 times [2020-11-28 07:40:57,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:57,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062904876] [2020-11-28 07:40:57,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:57,253 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:40:57,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679795083] [2020-11-28 07:40:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 [2020-11-28 07:40:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:57,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 07:40:57,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:57,370 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 07:40:57,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:57,389 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:40:57,406 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 07:40:57,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062904876] [2020-11-28 07:40:57,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:40:57,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679795083] [2020-11-28 07:40:57,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:40:57,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-28 07:40:57,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028605008] [2020-11-28 07:40:57,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:40:57,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:40:57,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:40:57,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:40:57,410 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 5 states. [2020-11-28 07:40:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:40:58,100 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-11-28 07:40:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:40:58,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 07:40:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:40:58,102 INFO L225 Difference]: With dead ends: 118 [2020-11-28 07:40:58,102 INFO L226 Difference]: Without dead ends: 92 [2020-11-28 07:40:58,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:40:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-28 07:40:58,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2020-11-28 07:40:58,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-28 07:40:58,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-11-28 07:40:58,114 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 11 [2020-11-28 07:40:58,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:40:58,115 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-11-28 07:40:58,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:40:58,115 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-11-28 07:40:58,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:40:58,116 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:40:58,116 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:40:58,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:40:58,339 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:40:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:40:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash 589658365, now seen corresponding path program 1 times [2020-11-28 07:40:58,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:40:58,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643383643] [2020-11-28 07:40:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:40:58,369 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:40:58,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018569789] [2020-11-28 07:40:58,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 [2020-11-28 07:40:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:40:58,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:40:58,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:40:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:58,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:40:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:40:58,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643383643] [2020-11-28 07:40:58,491 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:40:58,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018569789] [2020-11-28 07:40:58,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931692432] [2020-11-28 07:40:58,513 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-28 07:40:58,513 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:40:58,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:40:58,523 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:40:58,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:40:59,484 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:40:59,655 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-11-28 07:40:59,878 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-11-28 07:41:00,130 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-11-28 07:41:00,870 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-11-28 07:41:01,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:41:01,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 8 [2020-11-28 07:41:01,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533159552] [2020-11-28 07:41:01,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:41:01,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:41:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:41:01,573 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 6 states. [2020-11-28 07:41:01,972 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-11-28 07:41:02,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:02,333 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2020-11-28 07:41:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:41:02,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-28 07:41:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:02,334 INFO L225 Difference]: With dead ends: 109 [2020-11-28 07:41:02,335 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 07:41:02,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:41:02,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 07:41:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2020-11-28 07:41:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-28 07:41:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-11-28 07:41:02,350 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 19 [2020-11-28 07:41:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:02,350 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-11-28 07:41:02,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:41:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-11-28 07:41:02,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 07:41:02,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:02,351 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:02,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 07:41:02,577 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:41:02,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:02,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1098770591, now seen corresponding path program 1 times [2020-11-28 07:41:02,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:02,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188989308] [2020-11-28 07:41:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:02,587 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:41:02,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051926774] [2020-11-28 07:41:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/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 [2020-11-28 07:41:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:02,648 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:41:02,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:41:02,710 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:41:02,710 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:41:02,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-28 07:41:02,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:02 BoogieIcfgContainer [2020-11-28 07:41:02,959 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:02,959 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:02,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:02,960 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:02,960 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:40:54" (3/4) ... [2020-11-28 07:41:02,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:41:03,007 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1bde499b-5ee9-458e-847a-6b3112d1e9cf/bin/utaipan/witness.graphml [2020-11-28 07:41:03,008 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:03,009 INFO L168 Benchmark]: Toolchain (without parser) took 9219.53 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 52.5 MB in the beginning and 50.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:03,009 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 71.3 MB. Free memory was 50.0 MB in the beginning and 50.0 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:03,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.88 ms. Allocated memory is still 86.0 MB. Free memory was 52.3 MB in the beginning and 62.3 MB in the end (delta: -9.9 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:03,011 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.07 ms. Allocated memory is still 86.0 MB. Free memory was 62.3 MB in the beginning and 60.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:03,011 INFO L168 Benchmark]: Boogie Preprocessor took 39.11 ms. Allocated memory is still 86.0 MB. Free memory was 60.3 MB in the beginning and 59.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:03,012 INFO L168 Benchmark]: RCFGBuilder took 622.11 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 59.0 MB in the beginning and 80.9 MB in the end (delta: -21.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:03,013 INFO L168 Benchmark]: TraceAbstraction took 8065.63 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 80.5 MB in the beginning and 52.4 MB in the end (delta: 28.1 MB). Peak memory consumption was 49.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:03,013 INFO L168 Benchmark]: Witness Printer took 48.55 ms. Allocated memory is still 125.8 MB. Free memory was 52.4 MB in the beginning and 50.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:03,017 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 71.3 MB. Free memory was 50.0 MB in the beginning and 50.0 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 369.88 ms. Allocated memory is still 86.0 MB. Free memory was 52.3 MB in the beginning and 62.3 MB in the end (delta: -9.9 MB). Peak memory consumption was 5.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.07 ms. Allocated memory is still 86.0 MB. Free memory was 62.3 MB in the beginning and 60.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.11 ms. Allocated memory is still 86.0 MB. Free memory was 60.3 MB in the beginning and 59.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 622.11 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 59.0 MB in the beginning and 80.9 MB in the end (delta: -21.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8065.63 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 80.5 MB in the beginning and 52.4 MB in the end (delta: 28.1 MB). Peak memory consumption was 49.7 MB. Max. memory is 16.1 GB. * Witness Printer took 48.55 ms. Allocated memory is still 125.8 MB. Free memory was 52.4 MB in the beginning and 50.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] int counter = 0; [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_unsigned_short() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<1 [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L15] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [counter=1] [L33] EXPR counter++ VAL [counter=2] [L33] COND FALSE !(counter++<1) [L15] COND FALSE !(!(cond)) VAL [counter=2] [L15] COND TRUE !(cond) VAL [counter=2] [L8] __assert_fail("0", "cohencu-ll.c", 8, "reach_error") VAL [counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 49 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 184 SDtfs, 221 SDslu, 321 SDs, 0 SdLazy, 333 SolverSat, 87 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=5, 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, 6 MinimizatonAttempts, 83 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 5238 SizeOfPredicates, 14 NumberOfNonLiveVariables, 354 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 11 InterpolantComputations, 9 PerfectInterpolantSequences, 8/10 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: OVERALL_TIME[ms]: 972, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 15, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 28, TOOLS_POST_TIME[ms]: 502, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 28, TOOLS_QUANTIFIERELIM_TIME[ms]: 490, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 422, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 45, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 301, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 6, DOMAIN_ISBOTTOM_APPLICATIONS: 15, DOMAIN_ISBOTTOM_TIME[ms]: 99, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 46, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 45, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 19, DAG_COMPRESSION_PROCESSED_NODES: 183, DAG_COMPRESSION_RETAINED_NODES: 50, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...