./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/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 cd82e87d04e0f7b50b2cbc6595c4c8c661078ee2 ......................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:41:06,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:41:06,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:41:06,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:41:06,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:41:06,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:41:06,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:41:06,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:41:06,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:41:06,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:41:06,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:41:06,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:41:06,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:41:06,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:41:06,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:41:06,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:41:06,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:41:06,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:41:06,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:41:06,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:41:06,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:41:06,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:41:06,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:41:06,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:41:06,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:41:06,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:41:06,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:41:06,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:41:06,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:41:06,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:41:06,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:41:06,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:41:06,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:41:06,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:41:06,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:41:06,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:41:06,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:41:06,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:41:06,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:41:06,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:41:06,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:41:06,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 16:41:06,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:41:06,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:41:06,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:41:06,679 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:41:06,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:41:06,679 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:41:06,679 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:41:06,679 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:41:06,679 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:41:06,679 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:41:06,680 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:41:06,680 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:41:06,680 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:41:06,680 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:41:06,680 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:41:06,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:41:06,681 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:41:06,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:41:06,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:41:06,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:41:06,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:41:06,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:41:06,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:41:06,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:41:06,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:41:06,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:41:06,683 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:41:06,683 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:41:06,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:41:06,684 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:41:06,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:41:06,684 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:41:06,684 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_6eacbcee-24e5-4612-8cb4-d10a38508e67/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd82e87d04e0f7b50b2cbc6595c4c8c661078ee2 [2020-12-09 16:41:06,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:41:06,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:41:06,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:41:06,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:41:06,885 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:41:06,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-12-09 16:41:06,929 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/data/f24bfa6fa/310c9e4b308a4052b316fc2cbe412b1a/FLAGebbfa194b [2020-12-09 16:41:07,282 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:41:07,283 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c [2020-12-09 16:41:07,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/data/f24bfa6fa/310c9e4b308a4052b316fc2cbe412b1a/FLAGebbfa194b [2020-12-09 16:41:07,298 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/data/f24bfa6fa/310c9e4b308a4052b316fc2cbe412b1a [2020-12-09 16:41:07,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:41:07,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:41:07,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:41:07,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:41:07,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:41:07,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1521b46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07, skipping insertion in model container [2020-12-09 16:41:07,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:41:07,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:41:07,422 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c[327,340] [2020-12-09 16:41:07,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:41:07,438 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:41:07,451 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/sv-benchmarks/c/loop-acceleration/underapprox_2-2.c[327,340] [2020-12-09 16:41:07,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:41:07,466 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:41:07,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07 WrapperNode [2020-12-09 16:41:07,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:41:07,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:41:07,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:41:07,468 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:41:07,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:41:07,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:41:07,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:41:07,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:41:07,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... [2020-12-09 16:41:07,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:41:07,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:41:07,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:41:07,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:41:07,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/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 [2020-12-09 16:41:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:41:07,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:41:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:41:07,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:41:07,716 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:41:07,716 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 16:41:07,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:41:07 BoogieIcfgContainer [2020-12-09 16:41:07,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:41:07,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:41:07,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:41:07,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:41:07,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:41:07" (1/3) ... [2020-12-09 16:41:07,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c86c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:41:07, skipping insertion in model container [2020-12-09 16:41:07,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:41:07" (2/3) ... [2020-12-09 16:41:07,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c86c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:41:07, skipping insertion in model container [2020-12-09 16:41:07,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:41:07" (3/3) ... [2020-12-09 16:41:07,725 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-2.c [2020-12-09 16:41:07,735 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:41:07,737 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 16:41:07,745 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 16:41:07,761 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:41:07,762 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:41:07,762 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:41:07,762 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:41:07,762 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:41:07,762 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:41:07,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:41:07,762 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:41:07,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 16:41:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 16:41:07,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:41:07,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 16:41:07,775 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:41:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:41:07,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1818790, now seen corresponding path program 1 times [2020-12-09 16:41:07,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:41:07,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620693187] [2020-12-09 16:41:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:41:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:41:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:41:07,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620693187] [2020-12-09 16:41:07,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:41:07,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:41:07,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210811230] [2020-12-09 16:41:07,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:41:07,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:41:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:41:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:41:07,925 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-12-09 16:41:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:41:07,940 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-12-09 16:41:07,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:41:07,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 16:41:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:41:07,947 INFO L225 Difference]: With dead ends: 13 [2020-12-09 16:41:07,947 INFO L226 Difference]: Without dead ends: 6 [2020-12-09 16:41:07,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:41:07,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-09 16:41:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-09 16:41:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-09 16:41:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-09 16:41:07,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-12-09 16:41:07,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:41:07,971 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-09 16:41:07,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:41:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-09 16:41:07,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 16:41:07,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:41:07,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 16:41:07,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:41:07,972 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 16:41:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:41:07,972 INFO L82 PathProgramCache]: Analyzing trace with hash 55770291, now seen corresponding path program 1 times [2020-12-09 16:41:07,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:41:07,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120739981] [2020-12-09 16:41:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:41:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:41:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:41:08,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120739981] [2020-12-09 16:41:08,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908497909] [2020-12-09 16:41:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/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 [2020-12-09 16:41:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:41:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 16:41:08,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:41:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:41:08,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:41:08,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:41:08,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113791280] [2020-12-09 16:41:08,157 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 16:41:08,157 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:41:08,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:41:08,164 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:41:08,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:41:08,435 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:41:08,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:41:08,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:41:08,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 7 [2020-12-09 16:41:08,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119254308] [2020-12-09 16:41:08,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:41:08,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:41:08,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:41:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-09 16:41:08,613 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 8 states. [2020-12-09 16:41:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:41:08,665 INFO L93 Difference]: Finished difference Result 9 states and 11 transitions. [2020-12-09 16:41:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 16:41:08,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2020-12-09 16:41:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:41:08,666 INFO L225 Difference]: With dead ends: 9 [2020-12-09 16:41:08,666 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 16:41:08,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-09 16:41:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 16:41:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 16:41:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 16:41:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 16:41:08,667 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2020-12-09 16:41:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:41:08,668 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 16:41:08,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:41:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 16:41:08,668 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 16:41:08,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 16:41:08,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 16:41:08,945 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 16:41:08,946 INFO L262 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-09 16:41:08,946 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 16:41:08,947 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-12-09 16:41:08,947 INFO L258 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse0 (mod ULTIMATE.start_main_~x~0 4294967296))) (or (= 6 .cse0) (< .cse0 6))) [2020-12-09 16:41:08,948 INFO L262 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-12-09 16:41:08,948 INFO L265 CegarLoopResult]: At program point L6-2(lines 1 22) the Hoare annotation is: true [2020-12-09 16:41:08,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:41:08 BoogieIcfgContainer [2020-12-09 16:41:08,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:41:08,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:41:08,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:41:08,985 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:41:08,986 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:41:07" (3/4) ... [2020-12-09 16:41:08,992 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 16:41:09,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2020-12-09 16:41:09,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 16:41:09,004 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 16:41:09,005 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 16:41:09,031 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6eacbcee-24e5-4612-8cb4-d10a38508e67/bin/utaipan/witness.graphml [2020-12-09 16:41:09,031 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:41:09,032 INFO L168 Benchmark]: Toolchain (without parser) took 1730.43 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 56.0 MB in the beginning and 37.1 MB in the end (delta: 18.9 MB). Peak memory consumption was 44.0 MB. Max. memory is 16.1 GB. [2020-12-09 16:41:09,032 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 96.5 MB. Free memory is still 72.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:41:09,033 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.22 ms. Allocated memory is still 96.5 MB. Free memory was 55.8 MB in the beginning and 70.5 MB in the end (delta: -14.7 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. [2020-12-09 16:41:09,033 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.84 ms. Allocated memory is still 96.5 MB. Free memory was 70.5 MB in the beginning and 69.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:41:09,033 INFO L168 Benchmark]: Boogie Preprocessor took 14.36 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:41:09,034 INFO L168 Benchmark]: RCFGBuilder took 206.85 ms. Allocated memory is still 96.5 MB. Free memory was 68.3 MB in the beginning and 69.1 MB in the end (delta: -806.1 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:41:09,034 INFO L168 Benchmark]: TraceAbstraction took 1263.78 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 68.7 MB in the beginning and 39.2 MB in the end (delta: 29.5 MB). Peak memory consumption was 54.7 MB. Max. memory is 16.1 GB. [2020-12-09 16:41:09,035 INFO L168 Benchmark]: Witness Printer took 47.21 ms. Allocated memory is still 119.5 MB. Free memory was 39.2 MB in the beginning and 37.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:41:09,037 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 96.5 MB. Free memory is still 72.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 164.22 ms. Allocated memory is still 96.5 MB. Free memory was 55.8 MB in the beginning and 70.5 MB in the end (delta: -14.7 MB). Peak memory consumption was 6.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.84 ms. Allocated memory is still 96.5 MB. Free memory was 70.5 MB in the beginning and 69.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.36 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 206.85 ms. Allocated memory is still 96.5 MB. Free memory was 68.3 MB in the beginning and 69.1 MB in the end (delta: -806.1 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1263.78 ms. Allocated memory was 96.5 MB in the beginning and 119.5 MB in the end (delta: 23.1 MB). Free memory was 68.7 MB in the beginning and 39.2 MB in the end (delta: 29.5 MB). Peak memory consumption was 54.7 MB. Max. memory is 16.1 GB. * Witness Printer took 47.21 ms. Allocated memory is still 119.5 MB. Free memory was 39.2 MB in the beginning and 37.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 6 == x % 4294967296 || x % 4294967296 < 6 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 SDtfs, 1 SDslu, 5 SDs, 0 SdLazy, 16 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 235 SizeOfPredicates, 2 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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...