./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i --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_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/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 02f127c20511fa02dafb6b2fc07e9971c3cba295 .................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/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 02f127c20511fa02dafb6b2fc07e9971c3cba295 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:09:15,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:09:15,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:09:15,185 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:09:15,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:09:15,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:09:15,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:09:15,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:09:15,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:09:15,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:09:15,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:09:15,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:09:15,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:09:15,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:09:15,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:09:15,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:09:15,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:09:15,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:09:15,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:09:15,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:09:15,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:09:15,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:09:15,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:09:15,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:09:15,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:09:15,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:09:15,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:09:15,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:09:15,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:09:15,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:09:15,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:09:15,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:09:15,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:09:15,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:09:15,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:09:15,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:09:15,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:09:15,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:09:15,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:09:15,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:09:15,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:09:15,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:09:15,261 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:09:15,262 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:09:15,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:09:15,263 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:09:15,263 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:09:15,264 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:09:15,264 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:09:15,264 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:09:15,264 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:09:15,265 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:09:15,265 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:09:15,265 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:09:15,266 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:09:15,266 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:09:15,266 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:09:15,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:09:15,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:09:15,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:09:15,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:09:15,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:09:15,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:09:15,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:09:15,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:09:15,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:09:15,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:09:15,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:09:15,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:09:15,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:09:15,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:09:15,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:09:15,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:09:15,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:09:15,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:09:15,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:09:15,272 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:09:15,273 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:09:15,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:09:15,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:09:15,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:09:15,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:09:15,274 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_967d05ce-b382-420d-81b6-914115605447/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02f127c20511fa02dafb6b2fc07e9971c3cba295 [2020-11-30 02:09:15,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:09:15,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:09:15,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:09:15,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:09:15,562 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:09:15,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2020-11-30 02:09:15,644 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/78130321c/746e5362be754e3ab4a7334d3ac68f49/FLAG3d9964205 [2020-11-30 02:09:16,134 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:09:16,135 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2020-11-30 02:09:16,142 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/78130321c/746e5362be754e3ab4a7334d3ac68f49/FLAG3d9964205 [2020-11-30 02:09:16,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/78130321c/746e5362be754e3ab4a7334d3ac68f49 [2020-11-30 02:09:16,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:09:16,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:09:16,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:09:16,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:09:16,511 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:09:16,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a4a5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16, skipping insertion in model container [2020-11-30 02:09:16,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:09:16,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:09:16,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:09:16,760 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:09:16,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:09:16,797 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:09:16,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16 WrapperNode [2020-11-30 02:09:16,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:09:16,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:09:16,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:09:16,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:09:16,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:09:16,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:09:16,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:09:16,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:09:16,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... [2020-11-30 02:09:16,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:09:16,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:09:16,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:09:16,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:09:16,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:09:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:09:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:09:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:09:16,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:09:17,402 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:09:17,403 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-30 02:09:17,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:17 BoogieIcfgContainer [2020-11-30 02:09:17,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:09:17,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:09:17,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:09:17,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:09:17,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:09:16" (1/3) ... [2020-11-30 02:09:17,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d2377d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:09:17, skipping insertion in model container [2020-11-30 02:09:17,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:16" (2/3) ... [2020-11-30 02:09:17,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d2377d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:09:17, skipping insertion in model container [2020-11-30 02:09:17,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:17" (3/3) ... [2020-11-30 02:09:17,413 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.i [2020-11-30 02:09:17,424 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:09:17,428 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 02:09:17,441 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 02:09:17,464 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:09:17,464 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:09:17,464 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:09:17,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:09:17,465 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:09:17,465 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:09:17,465 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:09:17,465 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:09:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-30 02:09:17,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:09:17,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:17,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 02:09:17,485 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:09:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:17,492 INFO L82 PathProgramCache]: Analyzing trace with hash -597933539, now seen corresponding path program 1 times [2020-11-30 02:09:17,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:17,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597902197] [2020-11-30 02:09:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:17,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597902197] [2020-11-30 02:09:17,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:17,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:09:17,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773563429] [2020-11-30 02:09:17,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:09:17,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:09:17,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:09:17,689 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-11-30 02:09:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:17,706 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2020-11-30 02:09:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:09:17,707 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 02:09:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:17,716 INFO L225 Difference]: With dead ends: 29 [2020-11-30 02:09:17,716 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 02:09:17,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:09:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 02:09:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 02:09:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 02:09:17,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 02:09:17,754 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2020-11-30 02:09:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:17,754 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 02:09:17,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:09:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 02:09:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:09:17,755 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:17,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:17,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:09:17,756 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:09:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash 692135484, now seen corresponding path program 1 times [2020-11-30 02:09:17,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:17,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970996355] [2020-11-30 02:09:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:17,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:09:17,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049228841] [2020-11-30 02:09:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:09:17,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:17,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:18,050 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:09:34,642 WARN L193 SmtUtils]: Spent 16.54 s on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-11-30 02:09:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970996355] [2020-11-30 02:09:34,694 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:09:34,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049228841] [2020-11-30 02:09:34,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:34,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:09:34,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733455565] [2020-11-30 02:09:34,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:09:34,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:34,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:09:34,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:34,699 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-11-30 02:09:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:35,091 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-30 02:09:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:09:35,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 02:09:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:35,093 INFO L225 Difference]: With dead ends: 26 [2020-11-30 02:09:35,093 INFO L226 Difference]: Without dead ends: 18 [2020-11-30 02:09:35,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:09:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-30 02:09:35,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-11-30 02:09:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 02:09:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-11-30 02:09:35,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 7 [2020-11-30 02:09:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:35,099 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-11-30 02:09:35,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:09:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-11-30 02:09:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:09:35,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:35,100 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:35,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 02:09:35,316 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:09:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1911205491, now seen corresponding path program 1 times [2020-11-30 02:09:35,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:35,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426903851] [2020-11-30 02:09:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:35,331 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:09:35,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708723237] [2020-11-30 02:09:35,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:35,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:09:35,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:35,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:35,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426903851] [2020-11-30 02:09:35,455 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:09:35,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708723237] [2020-11-30 02:09:35,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:35,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2020-11-30 02:09:35,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103011328] [2020-11-30 02:09:35,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:09:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:09:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:35,458 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-11-30 02:09:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:35,514 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-30 02:09:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:09:35,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 02:09:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:35,517 INFO L225 Difference]: With dead ends: 33 [2020-11-30 02:09:35,517 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 02:09:35,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 02:09:35,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 02:09:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 02:09:35,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-11-30 02:09:35,523 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 10 [2020-11-30 02:09:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:35,524 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-11-30 02:09:35,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:09:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-11-30 02:09:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:09:35,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:35,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:35,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:35,740 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:09:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:35,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2045983640, now seen corresponding path program 1 times [2020-11-30 02:09:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:35,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960047875] [2020-11-30 02:09:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:35,772 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:09:35,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686153253] [2020-11-30 02:09:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 02:09:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:36,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:36,163 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:09:36,272 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-11-30 02:09:51,085 WARN L193 SmtUtils]: Spent 10.25 s on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-11-30 02:09:56,468 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification that was a NOOP. DAG size: 31 [2020-11-30 02:09:58,580 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (< (mod c_ULTIMATE.start_main_~r~0 4294967296) (mod c_ULTIMATE.start_main_~b~0 4294967296))) (.cse3 (mod c_ULTIMATE.start_main_~A~0 4294967296)) (.cse1 (* (- 2) (div (mod (* c_ULTIMATE.start_main_~b~0 2) 4294967296) 2) c_ULTIMATE.start_main_~q~0)) (.cse2 (* 4294967295 c_ULTIMATE.start_main_~r~0)) (.cse4 (forall ((aux_div_v_ULTIMATE.start_main_~b~0_32_46 Int) (aux_div_aux_mod_v_ULTIMATE.start_main_~b~0_32_46_57 Int)) (let ((.cse7 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_main_~b~0_32_46_57)) (.cse5 (* 2 c_ULTIMATE.start_main_~b~0)) (.cse6 (* 4294967296 aux_div_v_ULTIMATE.start_main_~b~0_32_46))) (or (<= .cse5 (+ .cse6 (mod c_ULTIMATE.start_main_~r~0 4294967296) .cse7)) (<= (+ .cse6 .cse7 4294967296) .cse5) (= (+ .cse6 (mod c_ULTIMATE.start_main_~B~0 4294967296)) .cse5) (< .cse5 (+ .cse6 .cse7)) (<= (+ .cse6 4294967296) .cse5) (< .cse5 .cse6)))))) (and (or .cse0 (<= (div (+ .cse1 .cse2 4294967295) 4294967296) (div (+ .cse1 .cse2 .cse3) 4294967296)) .cse4) (or .cse0 (<= (div (+ .cse1 .cse2 .cse3 (- 1)) 4294967296) (div (+ .cse1 .cse2 (- 1)) 4294967296)) .cse4))) is different from true [2020-11-30 02:10:00,784 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (< (mod c_ULTIMATE.start_main_~r~0 4294967296) (mod c_ULTIMATE.start_main_~b~0 4294967296))) (.cse3 (mod c_ULTIMATE.start_main_~A~0 4294967296)) (.cse1 (* (- 2) (div (mod (* c_ULTIMATE.start_main_~b~0 2) 4294967296) 2) c_ULTIMATE.start_main_~q~0)) (.cse2 (* 4294967295 c_ULTIMATE.start_main_~r~0))) (and (or .cse0 (<= (div (+ .cse1 .cse2 4294967295) 4294967296) (div (+ .cse1 .cse2 .cse3) 4294967296)) (forall ((aux_div_v_ULTIMATE.start_main_~b~0_32_46 Int) (aux_div_aux_mod_v_ULTIMATE.start_main_~b~0_32_46_57 Int)) (let ((.cse6 (* 4294967296 aux_div_aux_mod_v_ULTIMATE.start_main_~b~0_32_46_57)) (.cse4 (* 2 c_ULTIMATE.start_main_~b~0)) (.cse5 (* 4294967296 aux_div_v_ULTIMATE.start_main_~b~0_32_46))) (or (<= .cse4 (+ .cse5 (mod c_ULTIMATE.start_main_~r~0 4294967296) .cse6)) (<= (+ .cse5 .cse6 4294967296) .cse4) (= (+ .cse5 (mod c_ULTIMATE.start_main_~B~0 4294967296)) .cse4) (< .cse4 (+ .cse5 .cse6)) (<= (+ .cse5 4294967296) .cse4) (< .cse4 .cse5))))) (or .cse0 (<= (div (+ .cse1 .cse2 .cse3 (- 1)) 4294967296) (div (+ .cse1 .cse2 (- 1)) 4294967296)) (forall ((v_prenex_2 Int) (v_prenex_1 Int)) (let ((.cse8 (* 2 c_ULTIMATE.start_main_~b~0)) (.cse9 (* 4294967296 v_prenex_2)) (.cse7 (* 4294967296 v_prenex_1))) (or (= (+ .cse7 (mod c_ULTIMATE.start_main_~B~0 4294967296)) .cse8) (<= (+ .cse9 .cse7 4294967296) .cse8) (< .cse8 .cse7) (<= .cse8 (+ (mod c_ULTIMATE.start_main_~r~0 4294967296) .cse9 .cse7)) (<= (+ .cse7 4294967296) .cse8) (< .cse8 (+ .cse9 .cse7)))))))) is different from true [2020-11-30 02:10:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-11-30 02:10:00,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960047875] [2020-11-30 02:10:00,789 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:10:00,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686153253] [2020-11-30 02:10:00,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [64912877] [2020-11-30 02:10:00,817 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 02:10:00,818 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:10:00,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:10:00,832 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:10:00,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:10:00,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:10:02,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:10:02,365 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: should have been removed by DER at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminateConjuncts(XnfTir.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminateSingleDisjuct(XnfTir.java:143) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminate(XnfTir.java:114) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.applyEliminationInner(PartialQuantifierElimination.java:537) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.applyEliminationOuter(PartialQuantifierElimination.java:505) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.applyTir(PartialQuantifierElimination.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:285) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1133) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:10:02,376 INFO L168 Benchmark]: Toolchain (without parser) took 45868.81 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 56.4 MB in the beginning and 78.6 MB in the end (delta: -22.2 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:02,378 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 71.3 MB. Free memory is still 36.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:10:02,385 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.03 ms. Allocated memory is still 86.0 MB. Free memory was 56.1 MB in the beginning and 64.3 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:02,386 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.86 ms. Allocated memory is still 86.0 MB. Free memory was 64.3 MB in the beginning and 62.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:02,387 INFO L168 Benchmark]: Boogie Preprocessor took 25.03 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 61.8 MB in the end (delta: 838.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:10:02,387 INFO L168 Benchmark]: RCFGBuilder took 540.93 ms. Allocated memory is still 86.0 MB. Free memory was 61.8 MB in the beginning and 42.9 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:02,388 INFO L168 Benchmark]: TraceAbstraction took 44967.79 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 42.5 MB in the beginning and 78.6 MB in the end (delta: -36.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:02,397 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 71.3 MB. Free memory is still 36.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.03 ms. Allocated memory is still 86.0 MB. Free memory was 56.1 MB in the beginning and 64.3 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.86 ms. Allocated memory is still 86.0 MB. Free memory was 64.3 MB in the beginning and 62.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.03 ms. Allocated memory is still 86.0 MB. Free memory was 62.6 MB in the beginning and 61.8 MB in the end (delta: 838.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 540.93 ms. Allocated memory is still 86.0 MB. Free memory was 61.8 MB in the beginning and 42.9 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 44967.79 ms. Allocated memory was 86.0 MB in the beginning and 130.0 MB in the end (delta: 44.0 MB). Free memory was 42.5 MB in the beginning and 78.6 MB in the end (delta: -36.1 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: should have been removed by DER de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: should have been removed by DER: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.pqe.XnfTir.tryToEliminateConjuncts(XnfTir.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:10:05,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:10:05,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:10:05,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:10:05,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:10:05,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:10:05,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:10:05,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:10:05,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:10:05,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:10:05,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:10:05,191 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:10:05,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:10:05,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:10:05,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:10:05,208 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:10:05,209 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:10:05,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:10:05,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:10:05,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:10:05,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:10:05,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:10:05,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:10:05,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:10:05,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:10:05,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:10:05,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:10:05,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:10:05,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:10:05,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:10:05,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:10:05,249 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:10:05,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:10:05,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:10:05,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:10:05,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:10:05,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:10:05,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:10:05,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:10:05,258 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:10:05,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:10:05,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 02:10:05,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:10:05,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:10:05,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:10:05,310 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:10:05,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:10:05,311 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:10:05,311 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:10:05,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:10:05,311 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:10:05,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:10:05,314 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:10:05,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:10:05,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:10:05,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:10:05,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:10:05,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:10:05,316 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:10:05,316 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:10:05,317 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:10:05,317 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:10:05,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:10:05,318 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:10:05,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:10:05,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:10:05,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:10:05,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:10:05,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:10:05,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:10:05,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:10:05,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:10:05,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:10:05,321 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:10:05,322 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:10:05,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:10:05,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:10:05,323 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:10:05,323 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_967d05ce-b382-420d-81b6-914115605447/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02f127c20511fa02dafb6b2fc07e9971c3cba295 [2020-11-30 02:10:05,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:10:05,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:10:05,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:10:05,808 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:10:05,809 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:10:05,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2020-11-30 02:10:05,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/25174e06e/78a519b0e7bd436ebe9b3bfbe51c82f2/FLAGe2ef7dfcf [2020-11-30 02:10:06,525 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:10:06,529 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound2.i [2020-11-30 02:10:06,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/25174e06e/78a519b0e7bd436ebe9b3bfbe51c82f2/FLAGe2ef7dfcf [2020-11-30 02:10:06,883 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/data/25174e06e/78a519b0e7bd436ebe9b3bfbe51c82f2 [2020-11-30 02:10:06,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:10:06,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:10:06,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:10:06,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:10:06,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:10:06,894 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:10:06" (1/1) ... [2020-11-30 02:10:06,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74bb2614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:06, skipping insertion in model container [2020-11-30 02:10:06,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:10:06" (1/1) ... [2020-11-30 02:10:06,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:10:06,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:10:07,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:10:07,157 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:10:07,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:10:07,254 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:10:07,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07 WrapperNode [2020-11-30 02:10:07,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:10:07,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:10:07,269 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:10:07,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:10:07,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:10:07,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:10:07,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:10:07,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:10:07,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... [2020-11-30 02:10:07,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:10:07,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:10:07,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:10:07,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:10:07,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:10:07,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 02:10:07,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:10:07,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:10:07,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:10:07,947 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:10:07,947 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-30 02:10:07,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:10:07 BoogieIcfgContainer [2020-11-30 02:10:07,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:10:07,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:10:07,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:10:07,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:10:07,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:10:06" (1/3) ... [2020-11-30 02:10:07,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6815e827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:10:07, skipping insertion in model container [2020-11-30 02:10:07,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:10:07" (2/3) ... [2020-11-30 02:10:07,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6815e827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:10:07, skipping insertion in model container [2020-11-30 02:10:07,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:10:07" (3/3) ... [2020-11-30 02:10:07,961 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound2.i [2020-11-30 02:10:07,973 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:10:07,978 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 02:10:07,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 02:10:08,030 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:10:08,031 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:10:08,031 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:10:08,031 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:10:08,031 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:10:08,032 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:10:08,032 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:10:08,032 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:10:08,049 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 02:10:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:10:08,063 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:10:08,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:10:08,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:10:08,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:10:08,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1104570084, now seen corresponding path program 1 times [2020-11-30 02:10:08,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:10:08,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212784753] [2020-11-30 02:10:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 02:10:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:10:08,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 02:10:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:10:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:08,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:10:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:08,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212784753] [2020-11-30 02:10:08,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:10:08,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:10:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323371831] [2020-11-30 02:10:08,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:10:08,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:10:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:10:08,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:10:08,262 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-30 02:10:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:10:08,280 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2020-11-30 02:10:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:10:08,282 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-30 02:10:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:10:08,291 INFO L225 Difference]: With dead ends: 45 [2020-11-30 02:10:08,292 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 02:10:08,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:10:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 02:10:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 02:10:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:10:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-30 02:10:08,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2020-11-30 02:10:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:10:08,332 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-30 02:10:08,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:10:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-30 02:10:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:10:08,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:10:08,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:10:08,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:10:08,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:10:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:10:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2096849699, now seen corresponding path program 1 times [2020-11-30 02:10:08,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:10:08,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792829557] [2020-11-30 02:10:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 02:10:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:10:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:10:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:10:08,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:10:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:08,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:10:09,500 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-11-30 02:10:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:09,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792829557] [2020-11-30 02:10:09,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:10:09,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2020-11-30 02:10:09,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968340129] [2020-11-30 02:10:09,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:10:09,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:10:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:10:09,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:10:09,542 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-11-30 02:10:10,482 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-11-30 02:10:11,121 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2020-11-30 02:10:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:10:15,900 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-11-30 02:10:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:10:15,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-11-30 02:10:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:10:15,906 INFO L225 Difference]: With dead ends: 47 [2020-11-30 02:10:15,906 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:10:15,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:10:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:10:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-11-30 02:10:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 02:10:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 02:10:15,922 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2020-11-30 02:10:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:10:15,923 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 02:10:15,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:10:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 02:10:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:10:15,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:10:15,924 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:10:16,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:10:16,141 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:10:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:10:16,142 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747147, now seen corresponding path program 1 times [2020-11-30 02:10:16,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:10:16,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52071605] [2020-11-30 02:10:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 02:10:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:10:16,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:10:16,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:10:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:16,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:10:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:16,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52071605] [2020-11-30 02:10:16,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:10:16,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:10:16,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535152256] [2020-11-30 02:10:16,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:10:16,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:10:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:10:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:10:16,287 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2020-11-30 02:10:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:10:16,414 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-11-30 02:10:16,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:10:16,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-30 02:10:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:10:16,419 INFO L225 Difference]: With dead ends: 48 [2020-11-30 02:10:16,419 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:10:16,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:10:16,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:10:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 02:10:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:10:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-30 02:10:16,435 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-11-30 02:10:16,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:10:16,436 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-30 02:10:16,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:10:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-30 02:10:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:10:16,437 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:10:16,438 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:10:16,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 02:10:16,649 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:10:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:10:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2060482771, now seen corresponding path program 1 times [2020-11-30 02:10:16,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:10:16,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574414770] [2020-11-30 02:10:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-30 02:10:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:10:16,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:10:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:10:16,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:10:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:16,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:10:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:17,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574414770] [2020-11-30 02:10:17,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [160975620] [2020-11-30 02:10:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:10:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:10:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 02:10:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:10:17,238 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:10:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:17,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:10:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:18,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608854062] [2020-11-30 02:10:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:10:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:10:18,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:10:18,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:10:18,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:10:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:10:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:10:19,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:10:19,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8, 7, 8, 7] total 18 [2020-11-30 02:10:19,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621957419] [2020-11-30 02:10:19,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:10:19,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:10:19,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:10:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:10:19,094 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 18 states. [2020-11-30 02:10:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:10:19,096 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-11-30 02:10:19,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:10:19,096 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2020-11-30 02:10:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:10:19,096 INFO L225 Difference]: With dead ends: 27 [2020-11-30 02:10:19,096 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:10:19,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:10:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:10:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:10:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:10:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:10:19,098 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-11-30 02:10:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:10:19,098 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:10:19,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:10:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:10:19,098 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:10:19,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt --rewrite-divk,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:10:19,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:10:19,832 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 02:10:19,832 INFO L274 CegarLoopResult]: For program point L19(lines 19 22) no Hoare annotation was computed. [2020-11-30 02:10:19,832 INFO L270 CegarLoopResult]: At program point L19-1(line 40) the Hoare annotation is: (and (not (bvuge ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0)) (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32)) (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond) (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0) (= (_ bv1 32) ULTIMATE.start_main_~b~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) (= (_ bv0 32) ULTIMATE.start_main_~q~0)) [2020-11-30 02:10:19,832 INFO L274 CegarLoopResult]: For program point L19-2(lines 19 22) no Hoare annotation was computed. [2020-11-30 02:10:19,833 INFO L277 CegarLoopResult]: At program point L19-3(lines 18 24) the Hoare annotation is: true [2020-11-30 02:10:19,833 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-11-30 02:10:19,833 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 02:10:19,833 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:10:19,833 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 02:10:19,833 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 02:10:19,833 INFO L274 CegarLoopResult]: For program point L20(lines 20 21) no Hoare annotation was computed. [2020-11-30 02:10:19,833 INFO L274 CegarLoopResult]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2020-11-30 02:10:19,834 INFO L277 CegarLoopResult]: At program point L49(lines 25 50) the Hoare annotation is: true [2020-11-30 02:10:19,834 INFO L274 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-11-30 02:10:19,834 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-30 02:10:19,834 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-30 02:10:19,834 INFO L274 CegarLoopResult]: For program point L12-4(line 12) no Hoare annotation was computed. [2020-11-30 02:10:19,834 INFO L274 CegarLoopResult]: For program point L12-6(line 12) no Hoare annotation was computed. [2020-11-30 02:10:19,834 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:10:19,834 INFO L274 CegarLoopResult]: For program point L38-1(lines 38 47) no Hoare annotation was computed. [2020-11-30 02:10:19,835 INFO L270 CegarLoopResult]: At program point L34-2(lines 34 37) the Hoare annotation is: false [2020-11-30 02:10:19,835 INFO L274 CegarLoopResult]: For program point L43(lines 43 46) no Hoare annotation was computed. [2020-11-30 02:10:19,835 INFO L274 CegarLoopResult]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2020-11-30 02:10:19,835 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-11-30 02:10:19,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:10:19 BoogieIcfgContainer [2020-11-30 02:10:19,861 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:10:19,861 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:10:19,862 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:10:19,862 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:10:19,863 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:10:07" (3/4) ... [2020-11-30 02:10:19,867 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:10:19,881 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 02:10:19,882 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 02:10:19,882 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:10:19,882 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:10:19,955 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_967d05ce-b382-420d-81b6-914115605447/bin/utaipan/witness.graphml [2020-11-30 02:10:19,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:10:19,962 INFO L168 Benchmark]: Toolchain (without parser) took 13074.72 ms. Allocated memory was 48.2 MB in the beginning and 71.3 MB in the end (delta: 23.1 MB). Free memory was 24.5 MB in the beginning and 48.0 MB in the end (delta: -23.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:10:19,962 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 48.2 MB. Free memory was 31.2 MB in the beginning and 31.1 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:10:19,963 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.45 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 43.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:19,963 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.78 ms. Allocated memory is still 58.7 MB. Free memory was 43.2 MB in the beginning and 41.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:10:19,964 INFO L168 Benchmark]: Boogie Preprocessor took 29.61 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 40.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:10:19,964 INFO L168 Benchmark]: RCFGBuilder took 593.38 ms. Allocated memory is still 58.7 MB. Free memory was 40.5 MB in the beginning and 38.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:19,965 INFO L168 Benchmark]: TraceAbstraction took 11907.62 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 38.2 MB in the beginning and 51.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:19,967 INFO L168 Benchmark]: Witness Printer took 99.07 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 48.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:10:19,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 48.2 MB. Free memory was 31.2 MB in the beginning and 31.1 MB in the end (delta: 31.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 379.45 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.4 MB in the beginning and 43.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.78 ms. Allocated memory is still 58.7 MB. Free memory was 43.2 MB in the beginning and 41.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.61 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 40.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 593.38 ms. Allocated memory is still 58.7 MB. Free memory was 40.5 MB in the beginning and 38.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11907.62 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 38.2 MB in the beginning and 51.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 24.2 MB. Max. memory is 16.1 GB. * Witness Printer took 99.07 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 48.0 MB in the end (delta: 3.1 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: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: (((((!~bvuge32(r, b) && ~bvadd64(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && r == A) && 1bv32 == b) && b == B) && 0bv32 == q - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 91 SDslu, 56 SDs, 0 SdLazy, 82 SolverSat, 33 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 7 NumberOfFragments, 28 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 11088 SizeOfPredicates, 40 NumberOfNonLiveVariables, 224 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 8/40 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...