./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.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_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 2d0dd826da977145676f85980fecf0ec40390b47 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 2d0dd826da977145676f85980fecf0ec40390b47 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:24:30,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:24:30,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:24:31,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:24:31,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:24:31,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:24:31,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:24:31,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:24:31,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:24:31,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:24:31,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:24:31,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:24:31,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:24:31,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:24:31,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:24:31,085 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:24:31,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:24:31,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:24:31,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:24:31,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:24:31,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:24:31,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:24:31,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:24:31,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:24:31,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:24:31,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:24:31,125 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:24:31,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:24:31,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:24:31,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:24:31,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:24:31,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:24:31,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:24:31,136 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:24:31,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:24:31,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:24:31,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:24:31,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:24:31,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:24:31,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:24:31,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:24:31,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:24:31,202 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:24:31,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:24:31,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:24:31,205 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:24:31,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:24:31,206 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:24:31,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:24:31,206 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:24:31,206 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:24:31,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:24:31,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:24:31,208 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:24:31,209 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:24:31,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:24:31,209 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:24:31,211 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:24:31,212 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:24:31,212 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:24:31,212 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:24:31,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:24:31,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:24:31,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:24:31,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:24:31,214 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:24:31,214 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:24:31,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:24:31,215 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:24:31,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:24:31,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:24:31,216 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:24:31,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:24:31,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:24:31,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:24:31,217 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:24:31,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:24:31,218 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:24:31,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:24:31,218 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:24:31,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:24:31,219 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:24:31,219 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_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d0dd826da977145676f85980fecf0ec40390b47 [2020-11-30 02:24:31,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:24:31,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:24:31,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:24:31,590 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:24:31,591 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:24:31,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-11-30 02:24:31,674 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/3557edd78/a27c3cf0490241e09b82b7979802080a/FLAGefbd7116b [2020-11-30 02:24:32,261 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:24:32,264 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-11-30 02:24:32,275 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/3557edd78/a27c3cf0490241e09b82b7979802080a/FLAGefbd7116b [2020-11-30 02:24:32,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/3557edd78/a27c3cf0490241e09b82b7979802080a [2020-11-30 02:24:32,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:24:32,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:24:32,607 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:24:32,608 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:24:32,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:24:32,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:32,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d952947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32, skipping insertion in model container [2020-11-30 02:24:32,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:32,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:24:32,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:24:32,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:24:32,894 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:24:32,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:24:32,969 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:24:32,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32 WrapperNode [2020-11-30 02:24:32,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:24:32,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:24:32,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:24:32,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:24:32,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:32,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:24:33,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:24:33,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:24:33,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:24:33,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,041 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,043 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... [2020-11-30 02:24:33,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:24:33,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:24:33,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:24:33,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:24:33,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:24:33,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:24:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:24:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:24:33,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:24:33,833 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:24:33,833 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-30 02:24:33,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:33 BoogieIcfgContainer [2020-11-30 02:24:33,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:24:33,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:24:33,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:24:33,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:24:33,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:24:32" (1/3) ... [2020-11-30 02:24:33,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e43ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:24:33, skipping insertion in model container [2020-11-30 02:24:33,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:24:32" (2/3) ... [2020-11-30 02:24:33,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e43ffb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:24:33, skipping insertion in model container [2020-11-30 02:24:33,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:33" (3/3) ... [2020-11-30 02:24:33,846 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2020-11-30 02:24:33,858 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:24:33,863 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 02:24:33,875 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 02:24:33,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:24:33,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:24:33,912 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:24:33,913 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:24:33,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:24:33,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:24:33,914 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:24:33,914 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:24:33,935 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-30 02:24:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:24:33,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:33,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 02:24:33,945 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:33,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:33,953 INFO L82 PathProgramCache]: Analyzing trace with hash -597933539, now seen corresponding path program 1 times [2020-11-30 02:24:33,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:33,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410501415] [2020-11-30 02:24:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:34,201 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 02:24:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410501415] [2020-11-30 02:24:34,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:34,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:24:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669605105] [2020-11-30 02:24:34,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:24:34,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:24:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:24:34,228 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-11-30 02:24:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:34,246 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2020-11-30 02:24:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:24:34,248 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-11-30 02:24:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:34,256 INFO L225 Difference]: With dead ends: 29 [2020-11-30 02:24:34,257 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 02:24:34,260 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 02:24:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 02:24:34,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 02:24:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 02:24:34,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-11-30 02:24:34,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2020-11-30 02:24:34,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:34,296 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-11-30 02:24:34,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:24:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-11-30 02:24:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:24:34,297 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:34,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:34,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:24:34,298 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:34,299 INFO L82 PathProgramCache]: Analyzing trace with hash 692135484, now seen corresponding path program 1 times [2020-11-30 02:24:34,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:34,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125344563] [2020-11-30 02:24:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:34,320 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:34,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137046807] [2020-11-30 02:24:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:24:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:24:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:34,641 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 02:24:34,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:34,664 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:24:36,874 WARN L860 $PredicateComparison]: unable to prove that (or (<= (mod c_ULTIMATE.start_main_~b~0 4294967296) (mod c_ULTIMATE.start_main_~r~0 4294967296)) (= (mod (+ (* c_ULTIMATE.start_main_~q~0 c_ULTIMATE.start_main_~b~0) c_ULTIMATE.start_main_~r~0) 4294967296) (mod c_ULTIMATE.start_main_~A~0 4294967296))) is different from true [2020-11-30 02:24:36,876 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 02:24:36,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125344563] [2020-11-30 02:24:36,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137046807] [2020-11-30 02:24:36,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:36,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:24:36,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804864792] [2020-11-30 02:24:36,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:24:36,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:24:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=19, Unknown=1, NotChecked=8, Total=42 [2020-11-30 02:24:36,888 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-11-30 02:24:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:45,509 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-11-30 02:24:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:24:45,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-11-30 02:24:45,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:45,510 INFO L225 Difference]: With dead ends: 36 [2020-11-30 02:24:45,511 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 02:24:45,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=25, Invalid=34, Unknown=1, NotChecked=12, Total=72 [2020-11-30 02:24:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 02:24:45,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-30 02:24:45,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:24:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-30 02:24:45,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2020-11-30 02:24:45,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:45,519 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-30 02:24:45,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:24:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-30 02:24:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:24:45,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:45,521 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:45,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 02:24:45,722 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:45,722 INFO L82 PathProgramCache]: Analyzing trace with hash -162242810, now seen corresponding path program 1 times [2020-11-30 02:24:45,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:45,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123743422] [2020-11-30 02:24:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:45,745 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:45,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101712166] [2020-11-30 02:24:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:24:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:24:45,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:45,871 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 02:24:45,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:50,888 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-30 02:24:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123743422] [2020-11-30 02:24:50,891 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:50,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101712166] [2020-11-30 02:24:50,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358538247] [2020-11-30 02:24:50,916 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-30 02:24:50,917 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:50,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:50,929 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:50,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:51,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:51,565 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:24:51,764 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-11-30 02:24:52,694 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-11-30 02:24:53,735 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-11-30 02:24:54,658 WARN L193 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2020-11-30 02:24:54,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:24:54,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 4] total 10 [2020-11-30 02:24:54,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728285468] [2020-11-30 02:24:54,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:24:54,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:24:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=76, Unknown=1, NotChecked=0, Total=110 [2020-11-30 02:24:54,666 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-11-30 02:24:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:54,789 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-11-30 02:24:54,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:24:54,790 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-30 02:24:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:54,791 INFO L225 Difference]: With dead ends: 38 [2020-11-30 02:24:54,791 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:24:54,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=33, Invalid=76, Unknown=1, NotChecked=0, Total=110 [2020-11-30 02:24:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:24:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-11-30 02:24:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:24:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-30 02:24:54,800 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-11-30 02:24:54,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:54,800 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-30 02:24:54,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:24:54,800 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-30 02:24:54,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:24:54,801 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:54,801 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:55,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:55,002 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2045983640, now seen corresponding path program 1 times [2020-11-30 02:24:55,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:55,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541425473] [2020-11-30 02:24:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:55,025 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:55,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232029779] [2020-11-30 02:24:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:24:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:55,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 02:24:55,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:55,313 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 02:24:55,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:25:57,854 WARN L193 SmtUtils]: Spent 59.04 s on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-11-30 02:26:53,099 WARN L193 SmtUtils]: Spent 53.78 s on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-11-30 02:26:53,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541425473] [2020-11-30 02:26:53,351 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:26:53,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232029779] [2020-11-30 02:26:53,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: null [2020-11-30 02:26:53,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704305543] [2020-11-30 02:26:53,355 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 02:26:53,355 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:26:53,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:26:53,356 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:26:53,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:26:53,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:26:54,461 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:26:57,299 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2020-11-30 02:26:58,392 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-11-30 02:27:07,020 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:27:07,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:07,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-30 02:27:07,020 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-11-30 02:27:07,020 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:27:07,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-30 02:27:07,229 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-30 02:27:07,229 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-30 02:27:07,229 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-11-30 02:27:07,229 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-11-30 02:27:07,240 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-30 02:27:07,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:27:07 BoogieIcfgContainer [2020-11-30 02:27:07,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:27:07,241 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:27:07,241 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:27:07,242 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:27:07,242 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:24:33" (3/4) ... [2020-11-30 02:27:07,246 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 02:27:07,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:27:07,248 INFO L168 Benchmark]: Toolchain (without parser) took 154641.63 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 78.1 MB in the beginning and 94.5 MB in the end (delta: -16.4 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:07,248 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory is still 65.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:07,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 365.65 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 81.5 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:07,250 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:07,251 INFO L168 Benchmark]: Boogie Preprocessor took 28.63 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:07,252 INFO L168 Benchmark]: RCFGBuilder took 777.97 ms. Allocated memory is still 104.9 MB. Free memory was 78.8 MB in the beginning and 60.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:07,253 INFO L168 Benchmark]: TraceAbstraction took 153402.88 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 59.5 MB in the beginning and 94.5 MB in the end (delta: -35.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:07,253 INFO L168 Benchmark]: Witness Printer took 5.27 ms. Allocated memory is still 130.0 MB. Free memory is still 94.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:07,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 104.9 MB. Free memory is still 65.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 365.65 ms. Allocated memory is still 104.9 MB. Free memory was 77.8 MB in the beginning and 81.5 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 104.9 MB. Free memory was 81.5 MB in the beginning and 79.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.63 ms. Allocated memory is still 104.9 MB. Free memory was 79.9 MB in the beginning and 78.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 777.97 ms. Allocated memory is still 104.9 MB. Free memory was 78.8 MB in the beginning and 60.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 153402.88 ms. Allocated memory was 104.9 MB in the beginning and 130.0 MB in the end (delta: 25.2 MB). Free memory was 59.5 MB in the beginning and 94.5 MB in the end (delta: -35.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.27 ms. Allocated memory is still 130.0 MB. Free memory is still 94.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 12]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_uint() [L16] COND TRUE !cond [L30] B = 1 [L31] q = 0 [L32] r = A [L33] b = B [L34] COND TRUE 1 [L35] COND FALSE !(!(r >= b)) [L36] b = 2 * b [L34] COND TRUE 1 [L35] COND TRUE !(r >= b) [L38] COND TRUE 1 [L19] COND FALSE !(!(cond)) [L40] COND FALSE !(!(b != B)) [L41] q = 2 * q [L42] b = b / 2 [L43] COND FALSE !(r >= b) [L38] COND TRUE 1 [L19] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "divbin2.c", 10, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 153.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 25 SDslu, 33 SDs, 0 SdLazy, 52 SolverSat, 15 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 2421 SizeOfPredicates, 13 NumberOfNonLiveVariables, 104 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 4/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 649, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 10, TOOLS_POST_TIME[ms]: 292, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 10, TOOLS_QUANTIFIERELIM_TIME[ms]: 281, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 263, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 21, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 1, DOMAIN_JOIN_TIME[ms]: 92, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 143, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 15, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 49, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 181, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 181, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 3, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 12, DAG_COMPRESSION_TIME[ms]: 9, DAG_COMPRESSION_PROCESSED_NODES: 56, DAG_COMPRESSION_RETAINED_NODES: 24, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:27:10,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:27:10,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:27:10,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:27:10,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:27:10,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:27:10,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:27:10,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:27:10,329 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:27:10,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:27:10,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:27:10,333 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:27:10,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:27:10,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:27:10,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:27:10,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:27:10,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:27:10,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:27:10,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:27:10,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:27:10,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:27:10,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:27:10,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:27:10,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:27:10,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:27:10,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:27:10,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:27:10,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:27:10,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:27:10,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:27:10,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:27:10,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:27:10,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:27:10,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:27:10,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:27:10,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:27:10,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:27:10,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:27:10,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:27:10,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:27:10,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:27:10,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-11-30 02:27:10,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:27:10,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:27:10,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:27:10,458 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:27:10,458 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:27:10,459 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:27:10,459 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:27:10,459 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:27:10,460 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:27:10,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:27:10,461 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:27:10,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:27:10,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:27:10,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:27:10,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:27:10,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:27:10,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:27:10,463 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:27:10,463 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:27:10,464 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:27:10,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:27:10,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:27:10,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:27:10,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:27:10,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:27:10,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:27:10,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:27:10,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:27:10,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:27:10,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:27:10,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:27:10,467 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:27:10,468 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:27:10,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:27:10,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:27:10,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:27:10,469 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_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d0dd826da977145676f85980fecf0ec40390b47 [2020-11-30 02:27:10,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:27:11,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:27:11,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:27:11,025 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:27:11,026 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:27:11,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-11-30 02:27:11,125 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/75f60605c/a71ce38814d74972a5a485cb6b1eb3e5/FLAG890af875e [2020-11-30 02:27:11,819 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:27:11,822 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/sv-benchmarks/c/nla-digbench-scaling/divbin2_valuebound1.i [2020-11-30 02:27:11,831 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/75f60605c/a71ce38814d74972a5a485cb6b1eb3e5/FLAG890af875e [2020-11-30 02:27:12,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/data/75f60605c/a71ce38814d74972a5a485cb6b1eb3e5 [2020-11-30 02:27:12,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:27:12,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:27:12,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:27:12,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:27:12,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:27:12,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342a7124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12, skipping insertion in model container [2020-11-30 02:27:12,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:27:12,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:27:12,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:27:12,416 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:27:12,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:27:12,470 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:27:12,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12 WrapperNode [2020-11-30 02:27:12,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:27:12,475 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:27:12,475 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:27:12,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:27:12,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,531 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:27:12,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:27:12,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:27:12,533 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:27:12,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... [2020-11-30 02:27:12,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:27:12,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:27:12,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:27:12,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:27:12,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:27:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 02:27:12,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:27:12,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:27:12,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:27:13,329 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:27:13,329 INFO L298 CfgBuilder]: Removed 16 assume(true) statements. [2020-11-30 02:27:13,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:27:13 BoogieIcfgContainer [2020-11-30 02:27:13,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:27:13,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:27:13,339 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:27:13,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:27:13,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:27:12" (1/3) ... [2020-11-30 02:27:13,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a2fe751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:27:13, skipping insertion in model container [2020-11-30 02:27:13,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:27:12" (2/3) ... [2020-11-30 02:27:13,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a2fe751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:27:13, skipping insertion in model container [2020-11-30 02:27:13,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:27:13" (3/3) ... [2020-11-30 02:27:13,347 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_valuebound1.i [2020-11-30 02:27:13,360 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:27:13,366 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-30 02:27:13,382 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-30 02:27:13,422 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:27:13,422 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:27:13,423 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:27:13,423 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:27:13,423 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:27:13,423 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:27:13,423 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:27:13,424 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:27:13,439 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 02:27:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:27:13,445 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:13,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:13,447 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:13,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1104570084, now seen corresponding path program 1 times [2020-11-30 02:27:13,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:13,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714044185] [2020-11-30 02:27:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:27:13,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:13,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-11-30 02:27:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:13,648 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 02:27:13,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:13,654 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 02:27:13,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714044185] [2020-11-30 02:27:13,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:13,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:27:13,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873084263] [2020-11-30 02:27:13,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:27:13,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:27:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:27:13,682 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-30 02:27:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:13,701 INFO L93 Difference]: Finished difference Result 45 states and 66 transitions. [2020-11-30 02:27:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:27:13,703 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-11-30 02:27:13,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:13,713 INFO L225 Difference]: With dead ends: 45 [2020-11-30 02:27:13,713 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 02:27:13,717 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 02:27:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 02:27:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 02:27:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:27:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-11-30 02:27:13,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 10 [2020-11-30 02:27:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:13,753 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-11-30 02:27:13,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:27:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-11-30 02:27:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:27:13,754 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:13,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:13,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:27:13,966 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:13,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2096849699, now seen corresponding path program 1 times [2020-11-30 02:27:13,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:13,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432679936] [2020-11-30 02:27:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:27:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:14,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:27:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:14,158 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:27:14,376 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 02:27:14,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:14,897 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 02:27:14,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432679936] [2020-11-30 02:27:14,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:14,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [] total 10 [2020-11-30 02:27:14,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059897434] [2020-11-30 02:27:14,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:27:14,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:14,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:27:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:27:14,906 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 10 states. [2020-11-30 02:27:15,495 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2020-11-30 02:27:15,977 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2020-11-30 02:27:16,681 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-11-30 02:27:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:21,480 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-11-30 02:27:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:27:21,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-11-30 02:27:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:21,489 INFO L225 Difference]: With dead ends: 47 [2020-11-30 02:27:21,490 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:27:21,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:27:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:27:21,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-11-30 02:27:21,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 02:27:21,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 02:27:21,500 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2020-11-30 02:27:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:21,501 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 02:27:21,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:27:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 02:27:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:27:21,502 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:21,502 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:21,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:27:21,710 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:21,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2120747147, now seen corresponding path program 1 times [2020-11-30 02:27:21,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:21,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026136005] [2020-11-30 02:27:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:27:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:21,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:27:21,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:21,895 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 02:27:21,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:21,904 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 02:27:21,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026136005] [2020-11-30 02:27:21,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:27:21,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:27:21,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577493465] [2020-11-30 02:27:21,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:27:21,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:21,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:27:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:27:21,907 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 3 states. [2020-11-30 02:27:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:22,019 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-11-30 02:27:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:27:22,023 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-30 02:27:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:22,024 INFO L225 Difference]: With dead ends: 48 [2020-11-30 02:27:22,024 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:27:22,025 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 02:27:22,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:27:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 02:27:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:27:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-30 02:27:22,042 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-11-30 02:27:22,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:22,043 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-30 02:27:22,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:27:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-30 02:27:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:27:22,044 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:22,044 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:22,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 02:27:22,245 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:22,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:22,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2060482771, now seen corresponding path program 1 times [2020-11-30 02:27:22,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:22,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936290893] [2020-11-30 02:27:22,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:27:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:22,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:27:22,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:22,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:27:22,458 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 02:27:22,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:22,602 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 02:27:22,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936290893] [2020-11-30 02:27:22,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [272592665] [2020-11-30 02:27:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:27:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:22,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:27:22,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:22,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:27:22,778 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 02:27:22,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:23,093 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 02:27:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704415799] [2020-11-30 02:27:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/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 02:27:23,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:23,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 02:27:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:23,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:27:23,181 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 02:27:23,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:23,220 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 02:27:23,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:23,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 6, 7] total 14 [2020-11-30 02:27:23,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244114328] [2020-11-30 02:27:23,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 02:27:23,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 02:27:23,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:27:23,224 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 14 states. [2020-11-30 02:27:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:24,043 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2020-11-30 02:27:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:27:24,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-11-30 02:27:24,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:24,049 INFO L225 Difference]: With dead ends: 69 [2020-11-30 02:27:24,049 INFO L226 Difference]: Without dead ends: 53 [2020-11-30 02:27:24,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2020-11-30 02:27:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-30 02:27:24,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2020-11-30 02:27:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:27:24,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-30 02:27:24,059 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2020-11-30 02:27:24,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:24,059 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-30 02:27:24,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 02:27:24,060 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-30 02:27:24,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:27:24,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:24,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:24,667 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 02:27:24,667 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:24,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1911850598, now seen corresponding path program 1 times [2020-11-30 02:27:24,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:24,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75602338] [2020-11-30 02:27:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:24,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 02:27:24,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:24,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:27:25,058 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 02:27:25,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:26,180 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:27:26,214 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 02:27:26,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75602338] [2020-11-30 02:27:26,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2063694889] [2020-11-30 02:27:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:27:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:27:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:26,532 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 02:27:26,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:27,580 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-11-30 02:27:27,596 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 02:27:27,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577743036] [2020-11-30 02:27:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:27,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:27:27,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:27,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-30 02:27:27,797 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 02:27:27,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:28,062 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 02:27:28,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:28,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 8, 7, 9, 7] total 17 [2020-11-30 02:27:28,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596963001] [2020-11-30 02:27:28,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:27:28,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:28,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:27:28,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:27:28,065 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 17 states. [2020-11-30 02:27:28,889 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2020-11-30 02:27:29,541 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-11-30 02:27:30,554 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-11-30 02:27:31,143 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2020-11-30 02:27:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:31,327 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2020-11-30 02:27:31,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 02:27:31,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-11-30 02:27:31,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:31,331 INFO L225 Difference]: With dead ends: 64 [2020-11-30 02:27:31,331 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 02:27:31,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2020-11-30 02:27:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 02:27:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-11-30 02:27:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:27:31,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-11-30 02:27:31,352 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2020-11-30 02:27:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:31,353 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-11-30 02:27:31,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:27:31,353 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-11-30 02:27:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 02:27:31,355 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:31,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:31,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:31,959 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:31,959 INFO L82 PathProgramCache]: Analyzing trace with hash 952501652, now seen corresponding path program 2 times [2020-11-30 02:27:31,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:27:31,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350348226] [2020-11-30 02:27:31,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-11-30 02:27:32,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:27:32,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:27:32,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:27:32,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:32,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:32,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350348226] [2020-11-30 02:27:32,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1399885554] [2020-11-30 02:27:32,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:27:32,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:27:32,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:27:32,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:27:32,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:32,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:32,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959018779] [2020-11-30 02:27:32,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:32,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 02:27:32,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:27:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:27:32,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:32,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:27:32,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:27:32,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4, 5, 4, 5] total 7 [2020-11-30 02:27:32,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807168957] [2020-11-30 02:27:32,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:27:32,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:27:32,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:27:32,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:27:32,469 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2020-11-30 02:27:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:32,544 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-30 02:27:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:27:32,547 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-11-30 02:27:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:32,548 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:27:32,548 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:27:32,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:27:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:27:32,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:27:32,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:27:32,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:27:32,550 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-11-30 02:27:32,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:32,550 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:27:32,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:27:32,550 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:27:32,550 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:27:33,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3 [2020-11-30 02:27:33,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:27:33,562 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2020-11-30 02:27:33,925 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-11-30 02:27:33,927 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 02:27:33,927 INFO L274 CegarLoopResult]: For program point L19(lines 19 22) no Hoare annotation was computed. [2020-11-30 02:27:33,928 INFO L270 CegarLoopResult]: At program point L19-1(line 40) the Hoare annotation is: (let ((.cse3 (bvule ULTIMATE.start_main_~A~0 (_ bv1 32))) (.cse5 (= (_ bv1 32) ULTIMATE.start_main_~B~0)) (.cse0 (not (bvuge ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~b~0))) (.cse1 (= (bvadd ULTIMATE.start___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (.cse2 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse4 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0)) (.cse6 (= (_ bv0 32) ULTIMATE.start_main_~q~0))) (or (and .cse0 (bvuge ULTIMATE.start_main_~A~0 (_ bv1 32)) .cse1 .cse2 .cse3 .cse4 .cse5 (= (_ bv1 32) ULTIMATE.start_main_~q~0)) (and (= ULTIMATE.start_main_~A~0 (bvadd (bvmul ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~r~0)) .cse1 .cse2 .cse3 (= ULTIMATE.start_main_~b~0 (bvmul ULTIMATE.start_main_~B~0 (_ bv2 32))) (bvuge ULTIMATE.start_main_~r~0 (_ bv1 32)) .cse6 .cse5) (and .cse0 .cse1 .cse2 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0) (= (_ bv1 32) ULTIMATE.start_main_~b~0) .cse4 .cse6))) [2020-11-30 02:27:33,928 INFO L274 CegarLoopResult]: For program point L19-2(lines 19 22) no Hoare annotation was computed. [2020-11-30 02:27:33,928 INFO L277 CegarLoopResult]: At program point L19-3(lines 18 24) the Hoare annotation is: true [2020-11-30 02:27:33,928 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-11-30 02:27:33,928 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-30 02:27:33,928 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:27:33,928 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L20(lines 20 21) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L20-1(lines 20 21) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L277 CegarLoopResult]: At program point L49(lines 25 50) the Hoare annotation is: true [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L12-4(line 12) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L12-6(line 12) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:27:33,929 INFO L274 CegarLoopResult]: For program point L38-1(lines 38 47) no Hoare annotation was computed. [2020-11-30 02:27:33,930 INFO L270 CegarLoopResult]: At program point L34-2(lines 34 37) the Hoare annotation is: (let ((.cse0 (= (_ bv1 32) ULTIMATE.start_assume_abort_if_not_~cond)) (.cse1 (bvule ULTIMATE.start_main_~A~0 (_ bv1 32))) (.cse2 (= (_ bv0 32) ULTIMATE.start_main_~q~0)) (.cse3 (= (_ bv1 32) ULTIMATE.start_main_~B~0))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~r~0 ULTIMATE.start_main_~A~0) (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~B~0) .cse2 .cse3) (and (= ULTIMATE.start_main_~A~0 (bvadd (bvmul ULTIMATE.start_main_~q~0 ULTIMATE.start_main_~b~0) ULTIMATE.start_main_~r~0)) .cse0 .cse1 (= ULTIMATE.start_main_~b~0 (bvmul ULTIMATE.start_main_~B~0 (_ bv2 32))) (bvuge ULTIMATE.start_main_~r~0 (_ bv1 32)) .cse2 .cse3))) [2020-11-30 02:27:33,930 INFO L274 CegarLoopResult]: For program point L43(lines 43 46) no Hoare annotation was computed. [2020-11-30 02:27:33,930 INFO L274 CegarLoopResult]: For program point L43-2(lines 25 50) no Hoare annotation was computed. [2020-11-30 02:27:33,930 INFO L274 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-11-30 02:27:33,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:27:33 BoogieIcfgContainer [2020-11-30 02:27:33,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:27:33,948 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:27:33,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:27:33,948 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:27:33,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:27:13" (3/4) ... [2020-11-30 02:27:33,953 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:27:33,965 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-30 02:27:33,965 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-30 02:27:33,966 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:27:33,966 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:27:34,028 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c6b4c45e-b7d4-4d55-81c9-6b283c9764c6/bin/utaipan/witness.graphml [2020-11-30 02:27:34,032 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:27:34,033 INFO L168 Benchmark]: Toolchain (without parser) took 21890.95 ms. Allocated memory was 50.3 MB in the beginning and 73.4 MB in the end (delta: 23.1 MB). Free memory was 27.5 MB in the beginning and 28.7 MB in the end (delta: -1.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:34,034 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 50.3 MB. Free memory was 32.4 MB in the beginning and 32.4 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:27:34,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.48 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 29.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:34,035 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.13 ms. Allocated memory is still 50.3 MB. Free memory was 29.0 MB in the beginning and 27.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:34,036 INFO L168 Benchmark]: Boogie Preprocessor took 68.01 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:34,036 INFO L168 Benchmark]: RCFGBuilder took 732.82 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.2 MB in the beginning and 35.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:34,037 INFO L168 Benchmark]: TraceAbstraction took 20608.44 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 34.4 MB in the beginning and 32.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:34,038 INFO L168 Benchmark]: Witness Printer took 84.16 ms. Allocated memory is still 73.4 MB. Free memory was 32.0 MB in the beginning and 28.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:27:34,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 50.3 MB. Free memory was 32.4 MB in the beginning and 32.4 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 329.48 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 29.0 MB in the end (delta: -1.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.13 ms. Allocated memory is still 50.3 MB. Free memory was 29.0 MB in the beginning and 27.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 68.01 ms. Allocated memory is still 50.3 MB. Free memory was 27.6 MB in the beginning and 26.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 732.82 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.2 MB in the beginning and 35.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 20608.44 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 34.4 MB in the beginning and 32.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * Witness Printer took 84.16 ms. Allocated memory is still 73.4 MB. Free memory was 32.0 MB in the beginning and 28.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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: (((((1bv32 == cond && ~bvule32(A, 1bv32)) && r == A) && b == B) && 0bv32 == q) && 1bv32 == B) || ((((((A == ~bvadd64(~bvmul32(q, b), r) && 1bv32 == cond) && ~bvule32(A, 1bv32)) && b == ~bvmul32(B, 2bv32)) && ~bvuge32(r, 1bv32)) && 0bv32 == q) && 1bv32 == B) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((!~bvuge32(r, b) && ~bvuge32(A, 1bv32)) && ~bvadd64(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvule32(A, 1bv32)) && b == B) && 1bv32 == B) && 1bv32 == q) || (((((((A == ~bvadd64(~bvmul32(q, b), r) && ~bvadd64(cond, 4294967295bv32) == 0bv32) && 1bv32 == cond) && ~bvule32(A, 1bv32)) && b == ~bvmul32(B, 2bv32)) && ~bvuge32(r, 1bv32)) && 0bv32 == q) && 1bv32 == B)) || ((((((!~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: 19.7s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 346 SDslu, 224 SDs, 0 SdLazy, 262 SolverSat, 117 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 393 GetRequests, 315 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 8.6s 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, 6 MinimizatonAttempts, 41 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 11 NumberOfFragments, 137 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 37 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 195 NumberOfCodeBlocks, 195 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 366 ConstructedInterpolants, 0 QuantifiedInterpolants, 29950 SizeOfPredicates, 51 NumberOfNonLiveVariables, 521 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 24 InterpolantComputations, 6 PerfectInterpolantSequences, 50/124 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...