./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound1.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_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/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 0319027e70a0d2daf010f688863825be9b20c732 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:48:20,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:48:20,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:48:20,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:48:20,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:48:20,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:48:20,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:48:20,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:48:20,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:48:20,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:48:20,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:48:20,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:48:20,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:48:20,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:48:20,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:48:20,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:48:20,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:48:20,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:48:20,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:48:20,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:48:20,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:48:20,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:48:20,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:48:20,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:48:20,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:48:20,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:48:20,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:48:20,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:48:20,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:48:20,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:48:20,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:48:20,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:48:20,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:48:20,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:48:20,624 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:48:20,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:48:20,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:48:20,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:48:20,627 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:48:20,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:48:20,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:48:20,632 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 12:48:20,706 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:48:20,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:48:20,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:48:20,708 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:48:20,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:48:20,709 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:48:20,709 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:48:20,710 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:48:20,710 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:48:20,710 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:48:20,712 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:48:20,712 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:48:20,712 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:48:20,713 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:48:20,713 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:48:20,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:48:20,714 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 12:48:20,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:48:20,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 12:48:20,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:48:20,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:48:20,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:48:20,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:48:20,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 12:48:20,717 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 12:48:20,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:48:20,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:48:20,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:48:20,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:48:20,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:48:20,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:48:20,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:48:20,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:48:20,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:48:20,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:48:20,722 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:48:20,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:48:20,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:48:20,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:48:20,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:48:20,723 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_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0319027e70a0d2daf010f688863825be9b20c732 [2020-11-22 12:48:21,099 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:48:21,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:48:21,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:48:21,147 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:48:21,148 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:48:21,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2020-11-22 12:48:21,225 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/data/556c185ee/a464283c8b834e479bc5ee87497b81de/FLAG8eabd233c [2020-11-22 12:48:21,910 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:48:21,913 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2020-11-22 12:48:21,924 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/data/556c185ee/a464283c8b834e479bc5ee87497b81de/FLAG8eabd233c [2020-11-22 12:48:22,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/data/556c185ee/a464283c8b834e479bc5ee87497b81de [2020-11-22 12:48:22,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:48:22,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:48:22,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:22,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:48:22,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:48:22,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@426c16ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22, skipping insertion in model container [2020-11-22 12:48:22,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:48:22,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:48:22,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:22,509 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:48:22,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:48:22,547 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:48:22,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22 WrapperNode [2020-11-22 12:48:22,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:48:22,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:22,551 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:48:22,551 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:48:22,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:48:22,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:48:22,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:48:22,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:48:22,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... [2020-11-22 12:48:22,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:48:22,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:48:22,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:48:22,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:48:22,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:48:22,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:48:22,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:48:22,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:48:22,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:48:23,514 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:48:23,515 INFO L298 CfgBuilder]: Removed 40 assume(true) statements. [2020-11-22 12:48:23,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:23 BoogieIcfgContainer [2020-11-22 12:48:23,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:48:23,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:48:23,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:48:23,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:48:23,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:48:22" (1/3) ... [2020-11-22 12:48:23,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6373ef77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:23, skipping insertion in model container [2020-11-22 12:48:23,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:48:22" (2/3) ... [2020-11-22 12:48:23,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6373ef77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:48:23, skipping insertion in model container [2020-11-22 12:48:23,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:23" (3/3) ... [2020-11-22 12:48:23,529 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound1.c [2020-11-22 12:48:23,542 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:48:23,548 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-22 12:48:23,563 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-22 12:48:23,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:48:23,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:48:23,605 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:48:23,605 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:48:23,605 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:48:23,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:48:23,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:48:23,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:48:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-11-22 12:48:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 12:48:23,627 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:23,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 12:48:23,629 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:23,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash 5632582, now seen corresponding path program 1 times [2020-11-22 12:48:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:23,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025315139] [2020-11-22 12:48:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:23,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:48:23,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46316168] [2020-11-22 12:48:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:23,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 12:48:23,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:48:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:23,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:48:23,989 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:24,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025315139] [2020-11-22 12:48:24,013 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:48:24,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46316168] [2020-11-22 12:48:24,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:24,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:48:24,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576892737] [2020-11-22 12:48:24,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:48:24,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:48:24,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:48:24,050 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-11-22 12:48:26,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:26,405 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2020-11-22 12:48:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-22 12:48:26,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-22 12:48:26,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:26,419 INFO L225 Difference]: With dead ends: 108 [2020-11-22 12:48:26,419 INFO L226 Difference]: Without dead ends: 69 [2020-11-22 12:48:26,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:48:26,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-22 12:48:26,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 43. [2020-11-22 12:48:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-22 12:48:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-11-22 12:48:26,469 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 4 [2020-11-22 12:48:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:26,469 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-11-22 12:48:26,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:48:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-11-22 12:48:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 12:48:26,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:26,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 12:48:26,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-22 12:48:26,680 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:26,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1118130985, now seen corresponding path program 1 times [2020-11-22 12:48:26,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:26,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100087251] [2020-11-22 12:48:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:26,695 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:48:26,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189864153] [2020-11-22 12:48:26,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-22 12:48:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:48:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:26,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:48:26,855 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:26,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:26,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100087251] [2020-11-22 12:48:26,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:48:26,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189864153] [2020-11-22 12:48:26,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:26,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-22 12:48:26,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332698627] [2020-11-22 12:48:26,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-22 12:48:26,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:26,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-22 12:48:26,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:48:26,882 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-11-22 12:48:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:27,082 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-11-22 12:48:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:48:27,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-22 12:48:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:27,085 INFO L225 Difference]: With dead ends: 81 [2020-11-22 12:48:27,085 INFO L226 Difference]: Without dead ends: 73 [2020-11-22 12:48:27,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:48:27,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-22 12:48:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-11-22 12:48:27,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-22 12:48:27,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-11-22 12:48:27,129 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 6 [2020-11-22 12:48:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:27,130 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-11-22 12:48:27,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-22 12:48:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-11-22 12:48:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-22 12:48:27,131 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:27,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:27,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:27,332 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash -899235937, now seen corresponding path program 1 times [2020-11-22 12:48:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:27,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644457227] [2020-11-22 12:48:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:27,354 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:48:27,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944096623] [2020-11-22 12:48:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-22 12:48:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:48:27,438 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-22 12:48:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:27,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:48:27,484 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:27,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:27,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644457227] [2020-11-22 12:48:27,493 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:48:27,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944096623] [2020-11-22 12:48:27,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:27,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-22 12:48:27,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396195103] [2020-11-22 12:48:27,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 12:48:27,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:27,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 12:48:27,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-22 12:48:27,495 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 4 states. [2020-11-22 12:48:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:27,588 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-11-22 12:48:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-22 12:48:27,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-22 12:48:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:27,591 INFO L225 Difference]: With dead ends: 75 [2020-11-22 12:48:27,591 INFO L226 Difference]: Without dead ends: 73 [2020-11-22 12:48:27,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-22 12:48:27,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-22 12:48:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2020-11-22 12:48:27,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-22 12:48:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-11-22 12:48:27,605 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 13 [2020-11-22 12:48:27,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:27,606 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-11-22 12:48:27,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 12:48:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-11-22 12:48:27,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 12:48:27,607 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:27,607 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:27,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:27,821 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash 422363264, now seen corresponding path program 1 times [2020-11-22 12:48:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:27,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986601619] [2020-11-22 12:48:27,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:27,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:48:27,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501804541] [2020-11-22 12:48:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:27,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-22 12:48:27,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:48:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:27,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:48:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:28,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986601619] [2020-11-22 12:48:28,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:48:28,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501804541] [2020-11-22 12:48:28,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:48:28,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-22 12:48:28,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843172811] [2020-11-22 12:48:28,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 12:48:28,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 12:48:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-22 12:48:28,007 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 6 states. [2020-11-22 12:48:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:28,082 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-11-22 12:48:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 12:48:28,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-22 12:48:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:28,087 INFO L225 Difference]: With dead ends: 88 [2020-11-22 12:48:28,088 INFO L226 Difference]: Without dead ends: 36 [2020-11-22 12:48:28,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-22 12:48:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-22 12:48:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-11-22 12:48:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-22 12:48:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-11-22 12:48:28,096 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 18 [2020-11-22 12:48:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:28,097 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-11-22 12:48:28,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 12:48:28,101 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-11-22 12:48:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-22 12:48:28,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:48:28,103 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 12:48:28,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:28,317 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 12:48:28,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:48:28,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1449299222, now seen corresponding path program 1 times [2020-11-22 12:48:28,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:48:28,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36196770] [2020-11-22 12:48:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:48:28,345 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-22 12:48:28,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234952887] [2020-11-22 12:48:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:48:28,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-22 12:48:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 12:48:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:28,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 12:48:28,766 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:28,862 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-22 12:48:28,862 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-22 12:48:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:48:29,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36196770] [2020-11-22 12:48:29,066 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:48:29,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234952887] [2020-11-22 12:48:29,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989708281] [2020-11-22 12:48:29,092 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2020-11-22 12:48:29,092 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 12:48:29,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 12:48:29,105 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 12:48:29,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 12:48:29,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-22 12:48:29,640 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 12:48:29,907 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-11-22 12:48:30,085 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-11-22 12:48:30,343 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-11-22 12:48:30,547 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-11-22 12:48:30,813 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-11-22 12:48:31,038 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-11-22 12:48:31,583 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 12:48:31,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-22 12:48:31,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-11-22 12:48:31,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36704957] [2020-11-22 12:48:31,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-22 12:48:31,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:48:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-22 12:48:31,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2020-11-22 12:48:31,586 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 14 states. [2020-11-22 12:48:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:48:31,911 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-22 12:48:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 12:48:31,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2020-11-22 12:48:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:48:31,914 INFO L225 Difference]: With dead ends: 44 [2020-11-22 12:48:31,914 INFO L226 Difference]: Without dead ends: 0 [2020-11-22 12:48:31,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2020-11-22 12:48:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-22 12:48:31,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-22 12:48:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-22 12:48:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-22 12:48:31,915 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-11-22 12:48:31,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:48:31,916 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-22 12:48:31,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-22 12:48:31,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-22 12:48:31,916 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-22 12:48:32,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 12:48:32,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-22 12:48:32,673 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2020-11-22 12:48:32,677 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:48:32,677 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:48:32,677 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-22 12:48:32,678 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:48:32,678 INFO L270 CegarLoopResult]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~x~0 1)) (.cse2 (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)))) (or (let ((.cse1 (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~r~0))) (and .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~q~0) (= ULTIMATE.start_main_~x~0 .cse1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~y~0 .cse1) .cse2 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= 1 ULTIMATE.start_main_~b~0))) (and (<= 1 ULTIMATE.start_main_~y~0) .cse0 (<= ULTIMATE.start_main_~y~0 1) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~q~0 0) (<= 0 ULTIMATE.start_main_~r~0) .cse2))) [2020-11-22 12:48:32,678 INFO L274 CegarLoopResult]: For program point L38-3(lines 38 62) no Hoare annotation was computed. [2020-11-22 12:48:32,678 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:48:32,678 INFO L270 CegarLoopResult]: At program point L47-2(lines 47 59) the Hoare annotation is: (and (<= ULTIMATE.start_main_~r~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~q~0 0) (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~r~0) (<= 1 ULTIMATE.start_main_~b~0)) [2020-11-22 12:48:32,678 INFO L274 CegarLoopResult]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2020-11-22 12:48:32,678 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:48:32,679 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:48:32,679 INFO L270 CegarLoopResult]: At program point L15-1(lines 14 20) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~x~0 1))) (or (and .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~q~0) (= ULTIMATE.start_main_~a~0 1) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~r~0)) (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and (<= 1 ULTIMATE.start_main_~y~0) .cse0 (<= ULTIMATE.start_main_~y~0 1) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~q~0 0) (<= 0 ULTIMATE.start_main_~r~0)))) [2020-11-22 12:48:32,679 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:48:32,679 INFO L270 CegarLoopResult]: At program point L15-3(lines 42 43) the Hoare annotation is: (let ((.cse0 (<= ULTIMATE.start_main_~x~0 1))) (or (and .cse0 (= ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~q~0) (= ULTIMATE.start_main_~a~0 1) (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 (+ ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~r~0)) (< ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0)) (and (<= 1 ULTIMATE.start_main_~y~0) .cse0 (<= ULTIMATE.start_main_~y~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~q~0 0) (<= 0 ULTIMATE.start_main_~r~0)))) [2020-11-22 12:48:32,679 INFO L274 CegarLoopResult]: For program point L15-4(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:48:32,679 INFO L270 CegarLoopResult]: At program point L15-5(lines 14 20) the Hoare annotation is: (and (<= ULTIMATE.start_main_~r~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~q~0 0) (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~r~0) (<= 1 ULTIMATE.start_main_~b~0)) [2020-11-22 12:48:32,680 INFO L274 CegarLoopResult]: For program point L15-6(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:48:32,680 INFO L270 CegarLoopResult]: At program point L15-7(lines 14 20) the Hoare annotation is: (and (<= ULTIMATE.start_main_~r~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~q~0 0) (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~r~0) (<= 1 ULTIMATE.start_main_~b~0)) [2020-11-22 12:48:32,680 INFO L274 CegarLoopResult]: For program point L15-8(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:48:32,680 INFO L270 CegarLoopResult]: At program point L15-9(lines 52 53) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 1) (<= 1 ULTIMATE.start___VERIFIER_assert_~cond) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~q~0 0) (= ULTIMATE.start_main_~b~0 (* ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~y~0)) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~r~0) (<= 1 ULTIMATE.start_main_~b~0)) [2020-11-22 12:48:32,680 INFO L274 CegarLoopResult]: For program point L15-10(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:48:32,680 INFO L270 CegarLoopResult]: At program point L15-11(lines 14 20) the Hoare annotation is: false [2020-11-22 12:48:32,680 INFO L274 CegarLoopResult]: For program point L15-12(lines 15 18) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L277 CegarLoopResult]: At program point L15-13(lines 14 20) the Hoare annotation is: true [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point L16-2(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point L16-3(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point L16-4(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point L16-5(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:48:32,681 INFO L274 CegarLoopResult]: For program point L16-6(lines 16 17) no Hoare annotation was computed. [2020-11-22 12:48:32,682 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-22 12:48:32,682 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-22 12:48:32,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:48:32 BoogieIcfgContainer [2020-11-22 12:48:32,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:48:32,710 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:48:32,710 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:48:32,710 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:48:32,711 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:48:23" (3/4) ... [2020-11-22 12:48:32,714 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-22 12:48:32,727 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2020-11-22 12:48:32,728 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-22 12:48:32,728 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-22 12:48:32,729 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-22 12:48:32,803 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_64f55ae3-53d8-4ce8-99bc-fa6aecf32d01/bin/utaipan/witness.graphml [2020-11-22 12:48:32,804 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:48:32,805 INFO L168 Benchmark]: Toolchain (without parser) took 10551.55 ms. Allocated memory was 86.0 MB in the beginning and 165.7 MB in the end (delta: 79.7 MB). Free memory was 61.9 MB in the beginning and 116.2 MB in the end (delta: -54.3 MB). Peak memory consumption was 26.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:32,806 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory is still 57.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:48:32,806 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.34 ms. Allocated memory is still 86.0 MB. Free memory was 61.7 MB in the beginning and 52.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:32,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.05 ms. Allocated memory is still 86.0 MB. Free memory was 52.1 MB in the beginning and 50.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:32,808 INFO L168 Benchmark]: Boogie Preprocessor took 49.80 ms. Allocated memory is still 86.0 MB. Free memory was 50.4 MB in the beginning and 49.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:32,809 INFO L168 Benchmark]: RCFGBuilder took 876.79 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 49.2 MB in the beginning and 100.9 MB in the end (delta: -51.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:32,809 INFO L168 Benchmark]: TraceAbstraction took 9189.62 ms. Allocated memory was 134.2 MB in the beginning and 165.7 MB in the end (delta: 31.5 MB). Free memory was 100.1 MB in the beginning and 120.4 MB in the end (delta: -20.3 MB). Peak memory consumption was 85.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:32,810 INFO L168 Benchmark]: Witness Printer took 94.13 ms. Allocated memory is still 165.7 MB. Free memory was 120.4 MB in the beginning and 116.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:48:32,814 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 57.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.34 ms. Allocated memory is still 86.0 MB. Free memory was 61.7 MB in the beginning and 52.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.05 ms. Allocated memory is still 86.0 MB. Free memory was 52.1 MB in the beginning and 50.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.80 ms. Allocated memory is still 86.0 MB. Free memory was 50.4 MB in the beginning and 49.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 876.79 ms. Allocated memory was 86.0 MB in the beginning and 134.2 MB in the end (delta: 48.2 MB). Free memory was 49.2 MB in the beginning and 100.9 MB in the end (delta: -51.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9189.62 ms. Allocated memory was 134.2 MB in the beginning and 165.7 MB in the end (delta: 31.5 MB). Free memory was 100.1 MB in the beginning and 120.4 MB in the end (delta: -20.3 MB). Peak memory consumption was 85.4 MB. Max. memory is 16.1 GB. * Witness Printer took 94.13 ms. Allocated memory is still 165.7 MB. Free memory was 120.4 MB in the beginning and 116.2 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((r <= 1 && 1 <= cond) && r == x) && q == 0) && b == a * y) && b == y) && y <= r) && 1 <= b - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: ((((((x <= 1 && 1 <= cond) && r == x) && q == 0) && b == a * y) && b == y) && y <= r) && 1 <= b - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: (((((((x <= 1 && a == q) && a == 1) && 1 == cond) && y <= x) && y <= b + r) && r < b) && b == y) || ((((((1 <= y && x <= 1) && y <= 1) && 1 <= cond) && r == x) && q == 0) && 0 <= r) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 47]: Loop Invariant Derived loop invariant: ((((((r <= 1 && 1 <= cond) && r == x) && q == 0) && b == a * y) && b == y) && y <= r) && 1 <= b - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: ((((((r <= 1 && 1 <= cond) && r == x) && q == 0) && b == a * y) && b == y) && y <= r) && 1 <= b - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((((x <= 1 && a == q) && a == 1) && 1 == cond) && y <= x) && y <= b + r) && r < b) && b == y) || (((((1 <= y && x <= 1) && y <= 1) && r == x) && q == 0) && 0 <= r) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (((((((x <= 1 && a == q) && x == b + r) && 1 <= cond) && y <= b + r) && b == a * y) && b == y) && 1 <= b) || ((((((1 <= y && x <= 1) && y <= 1) && r == x) && q == 0) && 0 <= r) && b == a * y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 154 SDslu, 128 SDs, 0 SdLazy, 251 SolverSat, 46 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=2, 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, 5 MinimizatonAttempts, 43 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 9 PreInvPairs, 22 NumberOfFragments, 263 HoareAnnotationTreeSize, 9 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 151 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 14814 SizeOfPredicates, 35 NumberOfNonLiveVariables, 395 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 5/12 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...