./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound5.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_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 572360d878facce0c5d840a57f70fa0d65d827a5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 03:09:02,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 03:09:02,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 03:09:02,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 03:09:02,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 03:09:02,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 03:09:02,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 03:09:02,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 03:09:02,628 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 03:09:02,636 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 03:09:02,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 03:09:02,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 03:09:02,642 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 03:09:02,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 03:09:02,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 03:09:02,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 03:09:02,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 03:09:02,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 03:09:02,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 03:09:02,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 03:09:02,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 03:09:02,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 03:09:02,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 03:09:02,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 03:09:02,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 03:09:02,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 03:09:02,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 03:09:02,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 03:09:02,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 03:09:02,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 03:09:02,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 03:09:02,699 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 03:09:02,702 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 03:09:02,703 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 03:09:02,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 03:09:02,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 03:09:02,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 03:09:02,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 03:09:02,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 03:09:02,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 03:09:02,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 03:09:02,713 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 03:09:02,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 03:09:02,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 03:09:02,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 03:09:02,765 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 03:09:02,765 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 03:09:02,765 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 03:09:02,765 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 03:09:02,766 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 03:09:02,766 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 03:09:02,766 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 03:09:02,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 03:09:02,768 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 03:09:02,768 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 03:09:02,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 03:09:02,769 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 03:09:02,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 03:09:02,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 03:09:02,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 03:09:02,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 03:09:02,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 03:09:02,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 03:09:02,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 03:09:02,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 03:09:02,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 03:09:02,772 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 03:09:02,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 03:09:02,773 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 03:09:02,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 03:09:02,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 03:09:02,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 03:09:02,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 03:09:02,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:09:02,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 03:09:02,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 03:09:02,777 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 03:09:02,778 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 03:09:02,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 03:09:02,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 03:09:02,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 03:09:02,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 03:09:02,779 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_befec2a6-603d-4fba-908e-e64407f5c856/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 572360d878facce0c5d840a57f70fa0d65d827a5 [2020-11-30 03:09:03,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 03:09:03,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 03:09:03,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 03:09:03,196 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 03:09:03,196 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 03:09:03,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2020-11-30 03:09:03,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/data/5c4e2e614/5db427698a614b6d98b6a95f34c80a66/FLAGf45df572b [2020-11-30 03:09:03,851 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 03:09:03,852 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_valuebound5.c [2020-11-30 03:09:03,860 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/data/5c4e2e614/5db427698a614b6d98b6a95f34c80a66/FLAGf45df572b [2020-11-30 03:09:04,220 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/data/5c4e2e614/5db427698a614b6d98b6a95f34c80a66 [2020-11-30 03:09:04,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 03:09:04,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 03:09:04,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 03:09:04,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 03:09:04,242 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 03:09:04,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@400125a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04, skipping insertion in model container [2020-11-30 03:09:04,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 03:09:04,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 03:09:04,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:09:04,527 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 03:09:04,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:09:04,602 INFO L208 MainTranslator]: Completed translation [2020-11-30 03:09:04,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04 WrapperNode [2020-11-30 03:09:04,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 03:09:04,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 03:09:04,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 03:09:04,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 03:09:04,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 03:09:04,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 03:09:04,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 03:09:04,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 03:09:04,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... [2020-11-30 03:09:04,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 03:09:04,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 03:09:04,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 03:09:04,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 03:09:04,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 [2020-11-30 03:09:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 03:09:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 03:09:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 03:09:04,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 03:09:05,461 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 03:09:05,462 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-30 03:09:05,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:09:05 BoogieIcfgContainer [2020-11-30 03:09:05,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 03:09:05,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 03:09:05,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 03:09:05,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 03:09:05,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 03:09:04" (1/3) ... [2020-11-30 03:09:05,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2af3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:09:05, skipping insertion in model container [2020-11-30 03:09:05,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:09:04" (2/3) ... [2020-11-30 03:09:05,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a2af3f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:09:05, skipping insertion in model container [2020-11-30 03:09:05,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:09:05" (3/3) ... [2020-11-30 03:09:05,479 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound5.c [2020-11-30 03:09:05,499 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 03:09:05,505 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-30 03:09:05,517 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-30 03:09:05,547 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 03:09:05,547 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 03:09:05,548 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 03:09:05,548 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 03:09:05,548 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 03:09:05,548 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 03:09:05,549 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 03:09:05,549 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 03:09:05,566 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-30 03:09:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 03:09:05,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:09:05,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 03:09:05,572 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:09:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:09:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash 4158921, now seen corresponding path program 1 times [2020-11-30 03:09:05,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:09:05,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343425653] [2020-11-30 03:09:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:09:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:09:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:05,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343425653] [2020-11-30 03:09:05,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:09:05,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 03:09:05,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153936290] [2020-11-30 03:09:05,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:09:05,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:09:05,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:09:05,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:09:05,862 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-11-30 03:09:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:09:06,074 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2020-11-30 03:09:06,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 03:09:06,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-30 03:09:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:09:06,108 INFO L225 Difference]: With dead ends: 78 [2020-11-30 03:09:06,109 INFO L226 Difference]: Without dead ends: 47 [2020-11-30 03:09:06,116 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 [2020-11-30 03:09:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-30 03:09:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-11-30 03:09:06,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 03:09:06,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-11-30 03:09:06,156 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 4 [2020-11-30 03:09:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:09:06,156 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-11-30 03:09:06,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:09:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-11-30 03:09:06,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 03:09:06,157 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:09:06,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 03:09:06,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 03:09:06,158 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:09:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:09:06,159 INFO L82 PathProgramCache]: Analyzing trace with hash -298057684, now seen corresponding path program 1 times [2020-11-30 03:09:06,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:09:06,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883175333] [2020-11-30 03:09:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:09:06,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 03:09:06,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234048351] [2020-11-30 03:09:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 [2020-11-30 03:09:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:09:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 03:09:06,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:09:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:06,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:09:06,381 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 03:09:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:06,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883175333] [2020-11-30 03:09:06,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234048351] [2020-11-30 03:09:06,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:09:06,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 03:09:06,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165041966] [2020-11-30 03:09:06,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 03:09:06,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:09:06,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 03:09:06,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:09:06,422 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 5 states. [2020-11-30 03:09:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:09:06,567 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-11-30 03:09:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:09:06,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-30 03:09:06,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:09:06,570 INFO L225 Difference]: With dead ends: 47 [2020-11-30 03:09:06,570 INFO L226 Difference]: Without dead ends: 43 [2020-11-30 03:09:06,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 03:09:06,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-30 03:09:06,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-11-30 03:09:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-30 03:09:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-11-30 03:09:06,580 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2020-11-30 03:09:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:09:06,580 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-11-30 03:09:06,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 03:09:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-11-30 03:09:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 03:09:06,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:09:06,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:09:06,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 03:09:06,798 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:09:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:09:06,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1329561423, now seen corresponding path program 1 times [2020-11-30 03:09:06,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:09:06,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451624702] [2020-11-30 03:09:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:09:06,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 03:09:06,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424620113] [2020-11-30 03:09:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 [2020-11-30 03:09:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:09:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 03:09:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:09:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:06,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:09:06,983 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 03:09:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:07,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451624702] [2020-11-30 03:09:07,015 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:07,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424620113] [2020-11-30 03:09:07,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:09:07,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 03:09:07,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165096287] [2020-11-30 03:09:07,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 03:09:07,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:09:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 03:09:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 03:09:07,018 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 5 states. [2020-11-30 03:09:09,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:09:09,289 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-11-30 03:09:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 03:09:09,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-30 03:09:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:09:09,291 INFO L225 Difference]: With dead ends: 65 [2020-11-30 03:09:09,291 INFO L226 Difference]: Without dead ends: 53 [2020-11-30 03:09:09,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 03:09:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-30 03:09:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-11-30 03:09:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 03:09:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-11-30 03:09:09,302 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 8 [2020-11-30 03:09:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:09:09,305 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-11-30 03:09:09,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 03:09:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-11-30 03:09:09,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 03:09:09,307 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:09:09,307 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:09:09,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:09:09,523 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:09:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:09:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 781835680, now seen corresponding path program 1 times [2020-11-30 03:09:09,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:09:09,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996239438] [2020-11-30 03:09:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:09:09,539 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 03:09:09,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562470598] [2020-11-30 03:09:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 [2020-11-30 03:09:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:09:09,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 03:09:09,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:09:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:09,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:09:09,661 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 03:09:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 03:09:09,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996239438] [2020-11-30 03:09:09,698 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:09,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562470598] [2020-11-30 03:09:09,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177144655] [2020-11-30 03:09:09,724 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 03:09:09,724 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:09:09,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 03:09:09,734 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 03:09:09,735 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 03:09:09,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:09,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:10,589 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 03:09:10,846 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-11-30 03:09:11,578 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-11-30 03:09:11,799 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-11-30 03:09:12,027 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-11-30 03:09:12,242 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-11-30 03:09:12,537 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-11-30 03:09:12,729 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-30 03:09:12,979 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-11-30 03:09:12,980 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:12,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 03:09:12,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2020-11-30 03:09:12,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552019204] [2020-11-30 03:09:12,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 03:09:12,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:09:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 03:09:12,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-30 03:09:12,984 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 6 states. [2020-11-30 03:09:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:09:13,224 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-30 03:09:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 03:09:13,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-30 03:09:13,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:09:13,225 INFO L225 Difference]: With dead ends: 48 [2020-11-30 03:09:13,225 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 03:09:13,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-11-30 03:09:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 03:09:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-11-30 03:09:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-30 03:09:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-11-30 03:09:13,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 11 [2020-11-30 03:09:13,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:09:13,236 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-11-30 03:09:13,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 03:09:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-11-30 03:09:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 03:09:13,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:09:13,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:09:13,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:09:13,462 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:09:13,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:09:13,463 INFO L82 PathProgramCache]: Analyzing trace with hash -275001789, now seen corresponding path program 1 times [2020-11-30 03:09:13,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:09:13,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509635523] [2020-11-30 03:09:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:09:13,473 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 03:09:13,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040644466] [2020-11-30 03:09:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 [2020-11-30 03:09:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:09:13,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 03:09:13,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:09:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:13,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:09:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:13,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509635523] [2020-11-30 03:09:13,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:13,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040644466] [2020-11-30 03:09:13,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593075230] [2020-11-30 03:09:13,746 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 03:09:13,746 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:09:13,746 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 03:09:13,746 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 03:09:13,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 03:09:13,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:13,816 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:14,407 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 03:09:14,607 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-11-30 03:09:15,151 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-11-30 03:09:15,384 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-11-30 03:09:15,598 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-11-30 03:09:15,851 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-11-30 03:09:16,023 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-11-30 03:09:16,303 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-30 03:09:16,569 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-11-30 03:09:16,570 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:16,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 03:09:16,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-11-30 03:09:16,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835798544] [2020-11-30 03:09:16,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 03:09:16,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:09:16,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 03:09:16,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-11-30 03:09:16,572 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 7 states. [2020-11-30 03:09:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:09:25,187 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-11-30 03:09:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 03:09:25,189 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-11-30 03:09:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:09:25,191 INFO L225 Difference]: With dead ends: 78 [2020-11-30 03:09:25,191 INFO L226 Difference]: Without dead ends: 70 [2020-11-30 03:09:25,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-11-30 03:09:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-30 03:09:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2020-11-30 03:09:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 03:09:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-11-30 03:09:25,205 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 13 [2020-11-30 03:09:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:09:25,206 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-11-30 03:09:25,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 03:09:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-11-30 03:09:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 03:09:25,207 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:09:25,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2020-11-30 03:09:25,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:09:25,416 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:09:25,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:09:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1660600465, now seen corresponding path program 1 times [2020-11-30 03:09:25,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:09:25,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400576455] [2020-11-30 03:09:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:09:25,445 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 03:09:25,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674971910] [2020-11-30 03:09:25,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 [2020-11-30 03:09:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:09:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 03:09:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:09:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:09:25,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:09:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-30 03:09:25,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400576455] [2020-11-30 03:09:25,749 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:25,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674971910] [2020-11-30 03:09:25,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332915121] [2020-11-30 03:09:25,757 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 03:09:25,757 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:09:25,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 03:09:25,758 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 03:09:25,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 03:09:25,882 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:25,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:26,252 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 03:09:26,634 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-11-30 03:09:27,169 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-11-30 03:09:27,390 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2020-11-30 03:09:27,590 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2020-11-30 03:09:27,961 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2020-11-30 03:09:28,287 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-11-30 03:09:28,714 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-30 03:09:29,145 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-11-30 03:09:29,146 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:29,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 03:09:29,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2020-11-30 03:09:29,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232389426] [2020-11-30 03:09:29,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 03:09:29,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:09:29,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 03:09:29,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-11-30 03:09:29,149 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 7 states. [2020-11-30 03:09:29,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:09:29,705 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-11-30 03:09:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 03:09:29,707 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-11-30 03:09:29,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:09:29,708 INFO L225 Difference]: With dead ends: 60 [2020-11-30 03:09:29,708 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 03:09:29,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-11-30 03:09:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 03:09:29,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-30 03:09:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 03:09:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-11-30 03:09:29,727 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 22 [2020-11-30 03:09:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:09:29,729 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-11-30 03:09:29,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 03:09:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-11-30 03:09:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 03:09:29,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:09:29,731 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1] [2020-11-30 03:09:29,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-30 03:09:29,965 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:09:29,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:09:29,965 INFO L82 PathProgramCache]: Analyzing trace with hash -533079956, now seen corresponding path program 2 times [2020-11-30 03:09:29,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:09:29,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266791824] [2020-11-30 03:09:29,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:09:29,989 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 03:09:29,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462856487] [2020-11-30 03:09:29,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/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 [2020-11-30 03:09:30,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 03:09:30,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 03:09:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 03:09:30,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 03:09:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-30 03:09:30,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 03:09:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-30 03:09:30,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266791824] [2020-11-30 03:09:30,425 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462856487] [2020-11-30 03:09:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860196123] [2020-11-30 03:09:30,428 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 03:09:30,428 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 03:09:30,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 03:09:30,429 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 03:09:30,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 03:09:30,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:30,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 03:09:30,870 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 03:09:31,092 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-11-30 03:09:31,557 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-11-30 03:09:31,991 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-11-30 03:09:32,386 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-11-30 03:09:32,991 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-11-30 03:09:33,297 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-11-30 03:09:36,072 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-11-30 03:09:38,870 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-11-30 03:09:38,873 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 03:09:38,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 03:09:38,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-11-30 03:09:38,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140283165] [2020-11-30 03:09:38,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 03:09:38,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:09:38,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 03:09:38,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=194, Unknown=2, NotChecked=0, Total=240 [2020-11-30 03:09:38,875 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 8 states. [2020-11-30 03:09:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:09:41,624 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-11-30 03:09:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 03:09:41,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-11-30 03:09:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:09:41,625 INFO L225 Difference]: With dead ends: 44 [2020-11-30 03:09:41,625 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 03:09:41,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=74, Invalid=304, Unknown=2, NotChecked=0, Total=380 [2020-11-30 03:09:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 03:09:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 03:09:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 03:09:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 03:09:41,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-11-30 03:09:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:09:41,627 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 03:09:41,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 03:09:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 03:09:41,627 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 03:09:41,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 03:09:41,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 03:09:52,875 WARN L193 SmtUtils]: Spent 11.00 s on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-11-30 03:10:05,880 WARN L193 SmtUtils]: Spent 13.00 s on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-11-30 03:10:17,495 WARN L193 SmtUtils]: Spent 11.61 s on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2020-11-30 03:10:30,908 WARN L193 SmtUtils]: Spent 13.41 s on a formula simplification. DAG size of input: 44 DAG size of output: 20 [2020-11-30 03:10:31,186 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 15 [2020-11-30 03:10:40,677 WARN L193 SmtUtils]: Spent 9.49 s on a formula simplification. DAG size of input: 47 DAG size of output: 20 [2020-11-30 03:10:40,680 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 03:10:40,680 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 03:10:40,680 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 03:10:40,680 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 03:10:40,680 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 03:10:40,680 INFO L274 CegarLoopResult]: For program point L12(lines 12 15) no Hoare annotation was computed. [2020-11-30 03:10:40,681 INFO L270 CegarLoopResult]: At program point L12-1(lines 11 17) the Hoare annotation is: (let ((.cse0 (* ULTIMATE.start_main_~a~0 2))) (and (= (+ (* ULTIMATE.start_main_~t~0 2) (* ULTIMATE.start_main_~t~0 ULTIMATE.start_main_~t~0) 1) (* ULTIMATE.start_main_~s~0 4)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= (+ .cse0 1) ULTIMATE.start_main_~t~0) (= ULTIMATE.start_main_~s~0 (+ (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0) .cse0 1)))) [2020-11-30 03:10:40,681 INFO L274 CegarLoopResult]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2020-11-30 03:10:40,681 INFO L270 CegarLoopResult]: At program point L12-3(lines 11 17) the Hoare annotation is: (let ((.cse0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0))) (and (= (+ (* ULTIMATE.start_main_~t~0 2) (* ULTIMATE.start_main_~t~0 ULTIMATE.start_main_~t~0) 1) (* ULTIMATE.start_main_~s~0 4)) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 (+ .cse0 ULTIMATE.start_main_~t~0)) (= ULTIMATE.start_main_~s~0 (+ .cse0 (* ULTIMATE.start_main_~a~0 2) 1)))) [2020-11-30 03:10:40,681 INFO L274 CegarLoopResult]: For program point L12-4(lines 12 15) no Hoare annotation was computed. [2020-11-30 03:10:40,681 INFO L270 CegarLoopResult]: At program point L12-5(lines 36 37) the Hoare annotation is: (let ((.cse0 (* ULTIMATE.start_main_~a~0 2))) (and (= (+ (* ULTIMATE.start_main_~t~0 2) (* ULTIMATE.start_main_~t~0 ULTIMATE.start_main_~t~0) 1) (* ULTIMATE.start_main_~s~0 4)) (= (+ .cse0 1) ULTIMATE.start_main_~t~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 (+ (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0) .cse0 1)))) [2020-11-30 03:10:40,681 INFO L274 CegarLoopResult]: For program point L12-6(lines 12 15) no Hoare annotation was computed. [2020-11-30 03:10:40,681 INFO L270 CegarLoopResult]: At program point L12-7(lines 11 17) the Hoare annotation is: (or (let ((.cse0 (* ULTIMATE.start_main_~a~0 2))) (and (= (+ (* ULTIMATE.start_main_~t~0 2) (* ULTIMATE.start_main_~t~0 ULTIMATE.start_main_~t~0) 1) (* ULTIMATE.start_main_~s~0 4)) (= (+ .cse0 1) ULTIMATE.start_main_~t~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~s~0 (+ (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0) .cse0 1)))) (and (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) (= ULTIMATE.start_main_~s~0 1) (= ULTIMATE.start_main_~a~0 0) (= ULTIMATE.start_main_~t~0 1))) [2020-11-30 03:10:40,682 INFO L274 CegarLoopResult]: For program point L12-8(lines 12 15) no Hoare annotation was computed. [2020-11-30 03:10:40,682 INFO L270 CegarLoopResult]: At program point L12-9(lines 11 17) the Hoare annotation is: (and (= (+ (* ULTIMATE.start_main_~t~0 2) (* ULTIMATE.start_main_~t~0 ULTIMATE.start_main_~t~0) 1) (* ULTIMATE.start_main_~s~0 4)) (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond))) [2020-11-30 03:10:40,682 INFO L274 CegarLoopResult]: For program point L12-10(lines 12 15) no Hoare annotation was computed. [2020-11-30 03:10:40,682 INFO L270 CegarLoopResult]: At program point L12-11(lines 11 17) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-11-30 03:10:40,682 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 03:10:40,682 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 03:10:40,682 INFO L274 CegarLoopResult]: For program point L13(lines 13 14) no Hoare annotation was computed. [2020-11-30 03:10:40,682 INFO L274 CegarLoopResult]: For program point L13-1(lines 13 14) no Hoare annotation was computed. [2020-11-30 03:10:40,683 INFO L274 CegarLoopResult]: For program point L13-2(lines 13 14) no Hoare annotation was computed. [2020-11-30 03:10:40,683 INFO L274 CegarLoopResult]: For program point L13-3(lines 13 14) no Hoare annotation was computed. [2020-11-30 03:10:40,683 INFO L274 CegarLoopResult]: For program point L13-4(lines 13 14) no Hoare annotation was computed. [2020-11-30 03:10:40,683 INFO L274 CegarLoopResult]: For program point L13-5(lines 13 14) no Hoare annotation was computed. [2020-11-30 03:10:40,684 INFO L270 CegarLoopResult]: At program point L30-2(lines 30 42) the Hoare annotation is: (let ((.cse1 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~a~0))) (let ((.cse2 (* ULTIMATE.start_main_~a~0 2)) (.cse0 (= ULTIMATE.start_main_~s~0 (+ .cse1 ULTIMATE.start_main_~t~0)))) (or (and .cse0 (= ULTIMATE.start_main_~t~0 1) (= ULTIMATE.start_main_~s~0 (+ .cse1 .cse2 1))) (and (= (+ (* ULTIMATE.start_main_~t~0 2) (* ULTIMATE.start_main_~t~0 ULTIMATE.start_main_~t~0) 1) (* ULTIMATE.start_main_~s~0 4)) (= (+ .cse2 1) ULTIMATE.start_main_~t~0) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) .cse0)))) [2020-11-30 03:10:40,684 INFO L274 CegarLoopResult]: For program point L30-3(lines 30 42) no Hoare annotation was computed. [2020-11-30 03:10:40,684 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-11-30 03:10:40,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 03:10:40 BoogieIcfgContainer [2020-11-30 03:10:40,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 03:10:40,711 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 03:10:40,711 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 03:10:40,711 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 03:10:40,712 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:09:05" (3/4) ... [2020-11-30 03:10:40,714 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 03:10:40,726 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-30 03:10:40,727 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-30 03:10:40,727 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 03:10:40,727 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 03:10:40,798 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_befec2a6-603d-4fba-908e-e64407f5c856/bin/utaipan/witness.graphml [2020-11-30 03:10:40,802 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 03:10:40,804 INFO L168 Benchmark]: Toolchain (without parser) took 96577.93 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 121.1 MB in the beginning and 160.8 MB in the end (delta: -39.7 MB). Peak memory consumption was 29.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:10:40,805 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory is still 44.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:10:40,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.08 ms. Allocated memory is still 148.9 MB. Free memory was 121.1 MB in the beginning and 126.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 03:10:40,809 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.66 ms. Allocated memory is still 148.9 MB. Free memory was 126.4 MB in the beginning and 124.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:10:40,810 INFO L168 Benchmark]: Boogie Preprocessor took 42.58 ms. Allocated memory is still 148.9 MB. Free memory was 124.8 MB in the beginning and 123.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:10:40,812 INFO L168 Benchmark]: RCFGBuilder took 753.76 ms. Allocated memory is still 148.9 MB. Free memory was 123.3 MB in the beginning and 104.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 03:10:40,813 INFO L168 Benchmark]: TraceAbstraction took 95243.51 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 104.4 MB in the beginning and 164.0 MB in the end (delta: -59.6 MB). Peak memory consumption was 110.2 MB. Max. memory is 16.1 GB. [2020-11-30 03:10:40,816 INFO L168 Benchmark]: Witness Printer took 91.85 ms. Allocated memory is still 218.1 MB. Free memory was 164.0 MB in the beginning and 160.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 03:10:40,819 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory is still 44.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 367.08 ms. Allocated memory is still 148.9 MB. Free memory was 121.1 MB in the beginning and 126.4 MB in the end (delta: -5.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.66 ms. Allocated memory is still 148.9 MB. Free memory was 126.4 MB in the beginning and 124.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.58 ms. Allocated memory is still 148.9 MB. Free memory was 124.8 MB in the beginning and 123.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 753.76 ms. Allocated memory is still 148.9 MB. Free memory was 123.3 MB in the beginning and 104.8 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 95243.51 ms. Allocated memory was 148.9 MB in the beginning and 218.1 MB in the end (delta: 69.2 MB). Free memory was 104.4 MB in the beginning and 164.0 MB in the end (delta: -59.6 MB). Peak memory consumption was 110.2 MB. Max. memory is 16.1 GB. * Witness Printer took 91.85 ms. Allocated memory is still 218.1 MB. Free memory was 164.0 MB in the beginning and 160.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (((t * 2 + t * t + 1 == s * 4 && a * 2 + 1 == t) && 1 <= cond) && s == a * a + a * 2 + 1) || (((!(0 == cond) && s == 1) && a == 0) && t == 1) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((t * 2 + t * t + 1 == s * 4 && 1 == cond) && a * 2 + 1 == t) && s == a * a + a * 2 + 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: !(0 == cond) - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((s == a * a + t && t == 1) && s == a * a + a * 2 + 1) || (((t * 2 + t * t + 1 == s * 4 && a * 2 + 1 == t) && 1 <= cond) && s == a * a + t) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((t * 2 + t * t + 1 == s * 4 && a * 2 + 1 == t) && 1 <= cond) && s == a * a + a * 2 + 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: t * 2 + t * t + 1 == s * 4 && !(0 == cond) - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: ((t * 2 + t * t + 1 == s * 4 && 1 == cond) && s == a * a + t) && s == a * a + a * 2 + 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 36.2s, OverallIterations: 7, TraceHistogramMax: 5, AutomataDifference: 14.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 58.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 93 SDtfs, 216 SDslu, 200 SDs, 0 SdLazy, 352 SolverSat, 95 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 13.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 190 SyntacticMatches, 9 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 17.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 47 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 36 NumberOfFragments, 220 HoareAnnotationTreeSize, 7 FomulaSimplifications, 881 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 753 FormulaSimplificationTreeSizeReductionInter, 58.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 179 ConstructedInterpolants, 0 QuantifiedInterpolants, 21743 SizeOfPredicates, 32 NumberOfNonLiveVariables, 451 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 13 InterpolantComputations, 5 PerfectInterpolantSequences, 132/166 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...