./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 22f8891fc10bb8c305de18eb9540699e7b8a01ce ......................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 22f8891fc10bb8c305de18eb9540699e7b8a01ce ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:10:41,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:10:41,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:10:41,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:10:41,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:10:41,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:10:41,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:10:41,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:10:41,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:10:41,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:10:41,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:10:41,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:10:41,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:10:41,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:10:41,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:10:41,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:10:41,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:10:41,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:10:41,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:10:41,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:10:41,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:10:41,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:10:41,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:10:41,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:10:41,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:10:41,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:10:41,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:10:41,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:10:41,107 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:10:41,108 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:10:41,108 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:10:41,109 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:10:41,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:10:41,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:10:41,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:10:41,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:10:41,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:10:41,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:10:41,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:10:41,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:10:41,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:10:41,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 09:10:41,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:10:41,138 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:10:41,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:10:41,138 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:10:41,139 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:10:41,139 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:10:41,139 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:10:41,139 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:10:41,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:10:41,139 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:10:41,139 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:10:41,139 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:10:41,140 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:10:41,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:10:41,140 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:10:41,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:10:41,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:10:41,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:10:41,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:10:41,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:10:41,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:10:41,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:10:41,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:41,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:10:41,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:10:41,143 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:10:41,143 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:10:41,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:10:41,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:10:41,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:10:41,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:10:41,143 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_541c81a2-d5ea-419b-a133-704251836ce4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22f8891fc10bb8c305de18eb9540699e7b8a01ce [2020-12-09 09:10:41,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:10:41,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:10:41,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:10:41,360 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:10:41,360 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:10:41,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2020-12-09 09:10:41,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/b23a614b0/eca8ff4e56a245a387ec7f14809831f6/FLAGf6fd55b09 [2020-12-09 09:10:41,771 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:10:41,771 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/sv-benchmarks/c/bitvector/num_conversion_1.c [2020-12-09 09:10:41,775 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/b23a614b0/eca8ff4e56a245a387ec7f14809831f6/FLAGf6fd55b09 [2020-12-09 09:10:41,785 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/b23a614b0/eca8ff4e56a245a387ec7f14809831f6 [2020-12-09 09:10:41,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:10:41,788 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:10:41,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:41,789 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:10:41,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:10:41,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3745d27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41, skipping insertion in model container [2020-12-09 09:10:41,793 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:10:41,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:10:41,910 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2020-12-09 09:10:41,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:41,932 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:10:41,940 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2020-12-09 09:10:41,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:41,954 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:10:41,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41 WrapperNode [2020-12-09 09:10:41,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:41,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:41,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:10:41,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:10:41,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:41,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:10:41,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:10:41,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:10:41,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... [2020-12-09 09:10:41,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:10:41,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:10:41,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:10:41,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:10:41,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:10:42,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:10:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:10:42,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:10:42,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:10:42,254 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 09:10:42,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:42 BoogieIcfgContainer [2020-12-09 09:10:42,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:10:42,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:10:42,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:10:42,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:10:42,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:10:41" (1/3) ... [2020-12-09 09:10:42,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cfa042b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:42, skipping insertion in model container [2020-12-09 09:10:42,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:41" (2/3) ... [2020-12-09 09:10:42,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cfa042b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:42, skipping insertion in model container [2020-12-09 09:10:42,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:42" (3/3) ... [2020-12-09 09:10:42,261 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2020-12-09 09:10:42,271 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:10:42,273 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:10:42,281 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:10:42,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:10:42,297 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:10:42,297 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:10:42,298 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:10:42,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:10:42,298 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:10:42,298 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:10:42,298 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:10:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 09:10:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:10:42,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:42,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:10:42,310 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash 2068874, now seen corresponding path program 1 times [2020-12-09 09:10:42,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:10:42,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496508963] [2020-12-09 09:10:42,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:10:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:42,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:42,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496508963] [2020-12-09 09:10:42,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:10:42,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:10:42,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445090415] [2020-12-09 09:10:42,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:10:42,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:10:42,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:10:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:10:42,470 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-12-09 09:10:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:42,493 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-12-09 09:10:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:10:42,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 09:10:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:42,503 INFO L225 Difference]: With dead ends: 13 [2020-12-09 09:10:42,503 INFO L226 Difference]: Without dead ends: 6 [2020-12-09 09:10:42,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:10:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-09 09:10:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-09 09:10:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-09 09:10:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-09 09:10:42,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-12-09 09:10:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:42,536 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-09 09:10:42,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:10:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-09 09:10:42,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:10:42,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:42,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:10:42,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:10:42,537 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:42,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:42,538 INFO L82 PathProgramCache]: Analyzing trace with hash 64093736, now seen corresponding path program 1 times [2020-12-09 09:10:42,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:10:42,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930902719] [2020-12-09 09:10:42,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:10:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:42,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:42,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930902719] [2020-12-09 09:10:42,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70602383] [2020-12-09 09:10:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:10:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:42,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 09:10:42,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:42,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:42,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581677391] [2020-12-09 09:10:42,718 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 09:10:42,719 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:10:42,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:10:42,726 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:10:42,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:10:43,028 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:10:43,275 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:10:43,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:10:43,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-12-09 09:10:43,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871288053] [2020-12-09 09:10:43,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 09:10:43,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:10:43,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 09:10:43,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 09:10:43,279 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 7 states. [2020-12-09 09:10:43,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:43,332 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-12-09 09:10:43,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 09:10:43,333 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2020-12-09 09:10:43,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:43,333 INFO L225 Difference]: With dead ends: 12 [2020-12-09 09:10:43,333 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 09:10:43,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-09 09:10:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 09:10:43,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 09:10:43,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 09:10:43,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-09 09:10:43,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2020-12-09 09:10:43,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:43,337 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-09 09:10:43,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 09:10:43,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-09 09:10:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:10:43,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:43,338 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2020-12-09 09:10:43,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 09:10:43,540 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1885026038, now seen corresponding path program 2 times [2020-12-09 09:10:43,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:10:43,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290059558] [2020-12-09 09:10:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:10:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:43,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290059558] [2020-12-09 09:10:43,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145553851] [2020-12-09 09:10:43,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:43,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 09:10:43,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:10:43,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 09:10:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:43,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:45,032 WARN L197 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 32 [2020-12-09 09:10:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:45,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2128847470] [2020-12-09 09:10:45,036 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 09:10:45,036 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 09:10:45,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 09:10:45,036 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 09:10:45,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 09:10:45,169 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 09:10:45,451 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 09:10:45,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 09:10:45,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2020-12-09 09:10:45,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130509562] [2020-12-09 09:10:45,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 09:10:45,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:10:45,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 09:10:45,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-12-09 09:10:45,453 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2020-12-09 09:10:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:45,771 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2020-12-09 09:10:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 09:10:45,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2020-12-09 09:10:45,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:45,772 INFO L225 Difference]: With dead ends: 16 [2020-12-09 09:10:45,772 INFO L226 Difference]: Without dead ends: 13 [2020-12-09 09:10:45,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2020-12-09 09:10:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-09 09:10:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-09 09:10:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 09:10:45,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-09 09:10:45,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2020-12-09 09:10:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:45,774 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-09 09:10:45,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 09:10:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-09 09:10:45,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 09:10:45,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:45,775 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2020-12-09 09:10:45,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:10:45,977 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:45,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:45,978 INFO L82 PathProgramCache]: Analyzing trace with hash -490585974, now seen corresponding path program 3 times [2020-12-09 09:10:45,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:10:45,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965084865] [2020-12-09 09:10:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:10:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:10:46,007 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:10:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:10:46,029 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:10:46,042 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:10:46,042 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:10:46,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-12-09 09:10:46,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:10:46 BoogieIcfgContainer [2020-12-09 09:10:46,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:10:46,061 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:10:46,062 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:10:46,062 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:10:46,062 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:42" (3/4) ... [2020-12-09 09:10:46,064 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:10:46,064 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:10:46,065 INFO L168 Benchmark]: Toolchain (without parser) took 4276.90 ms. Allocated memory was 111.1 MB in the beginning and 180.4 MB in the end (delta: 69.2 MB). Free memory was 74.5 MB in the beginning and 122.8 MB in the end (delta: -48.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:46,065 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 111.1 MB. Free memory was 90.6 MB in the beginning and 90.5 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:10:46,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 165.80 ms. Allocated memory is still 111.1 MB. Free memory was 74.3 MB in the beginning and 87.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:46,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.59 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 86.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:46,067 INFO L168 Benchmark]: Boogie Preprocessor took 15.21 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 85.2 MB in the end (delta: 947.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:10:46,067 INFO L168 Benchmark]: RCFGBuilder took 259.15 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 70.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:46,068 INFO L168 Benchmark]: TraceAbstraction took 3804.89 ms. Allocated memory was 111.1 MB in the beginning and 180.4 MB in the end (delta: 69.2 MB). Free memory was 69.3 MB in the beginning and 122.8 MB in the end (delta: -53.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:10:46,068 INFO L168 Benchmark]: Witness Printer took 2.62 ms. Allocated memory is still 180.4 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:10:46,070 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 111.1 MB. Free memory was 90.6 MB in the beginning and 90.5 MB in the end (delta: 78.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 165.80 ms. Allocated memory is still 111.1 MB. Free memory was 74.3 MB in the beginning and 87.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.59 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 86.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.21 ms. Allocated memory is still 111.1 MB. Free memory was 86.1 MB in the beginning and 85.2 MB in the end (delta: 947.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 259.15 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 70.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3804.89 ms. Allocated memory was 111.1 MB in the beginning and 180.4 MB in the end (delta: 69.2 MB). Free memory was 69.3 MB in the beginning and 122.8 MB in the end (delta: -53.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.62 ms. Allocated memory is still 180.4 MB. Free memory is still 122.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 24, overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L16] unsigned char x; [L17] unsigned char y; [L18] unsigned char c; [L20] x = 37 [L21] y = 0 [L22] c = 0 [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND FALSE !(c < (unsigned char)8) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 4, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 4 SDslu, 28 SDs, 0 SdLazy, 53 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1546 SizeOfPredicates, 2 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:10:47,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:10:47,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:10:47,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:10:47,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:10:47,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:10:47,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:10:47,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:10:47,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:10:47,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:10:47,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:10:47,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:10:47,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:10:47,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:10:47,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:10:47,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:10:47,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:10:47,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:10:47,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:10:47,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:10:47,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:10:47,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:10:47,682 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:10:47,683 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:10:47,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:10:47,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:10:47,686 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:10:47,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:10:47,688 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:10:47,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:10:47,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:10:47,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:10:47,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:10:47,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:10:47,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:10:47,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:10:47,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:10:47,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:10:47,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:10:47,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:10:47,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:10:47,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2020-12-09 09:10:47,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:10:47,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:10:47,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:10:47,714 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:10:47,714 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:10:47,714 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:10:47,714 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:10:47,714 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:10:47,714 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:10:47,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:10:47,715 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:10:47,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:10:47,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 09:10:47,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:10:47,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 09:10:47,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:10:47,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 09:10:47,717 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:10:47,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:47,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:10:47,717 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:10:47,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 09:10:47,718 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 09:10:47,718 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 09:10:47,718 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 09:10:47,718 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:10:47,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:10:47,718 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_541c81a2-d5ea-419b-a133-704251836ce4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22f8891fc10bb8c305de18eb9540699e7b8a01ce [2020-12-09 09:10:47,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:10:47,951 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:10:47,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:10:47,954 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:10:47,954 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:10:47,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2020-12-09 09:10:48,003 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/237d6dde1/2c285bba5c9d4a03b688d687c5d4a5a7/FLAGe1e092bb0 [2020-12-09 09:10:48,390 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:10:48,391 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/sv-benchmarks/c/bitvector/num_conversion_1.c [2020-12-09 09:10:48,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/237d6dde1/2c285bba5c9d4a03b688d687c5d4a5a7/FLAGe1e092bb0 [2020-12-09 09:10:48,406 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/data/237d6dde1/2c285bba5c9d4a03b688d687c5d4a5a7 [2020-12-09 09:10:48,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:10:48,410 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:10:48,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:48,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:10:48,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:10:48,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f21d566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48, skipping insertion in model container [2020-12-09 09:10:48,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:10:48,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:10:48,540 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2020-12-09 09:10:48,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:48,557 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:10:48,566 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2020-12-09 09:10:48,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:10:48,580 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:10:48,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48 WrapperNode [2020-12-09 09:10:48,581 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:10:48,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:48,582 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:10:48,582 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:10:48,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,593 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,614 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:10:48,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:10:48,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:10:48,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:10:48,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... [2020-12-09 09:10:48,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:10:48,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:10:48,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:10:48,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:10:48,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:10:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:10:48,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:10:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 09:10:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:10:48,877 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:10:48,877 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 09:10:48,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:48 BoogieIcfgContainer [2020-12-09 09:10:48,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:10:48,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:10:48,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:10:48,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:10:48,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:10:48" (1/3) ... [2020-12-09 09:10:48,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39845b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:48, skipping insertion in model container [2020-12-09 09:10:48,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:10:48" (2/3) ... [2020-12-09 09:10:48,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39845b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:10:48, skipping insertion in model container [2020-12-09 09:10:48,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:48" (3/3) ... [2020-12-09 09:10:48,886 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2020-12-09 09:10:48,899 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:10:48,902 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 09:10:48,913 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 09:10:48,932 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:10:48,932 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 09:10:48,932 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:10:48,932 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:10:48,933 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:10:48,933 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:10:48,933 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:10:48,933 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:10:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-12-09 09:10:48,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:10:48,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:48,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:10:48,945 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2020-12-09 09:10:48,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:10:48,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415239079] [2020-12-09 09:10:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:49,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 09:10:49,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:49,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:49,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:10:49,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415239079] [2020-12-09 09:10:49,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:10:49,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:10:49,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434276974] [2020-12-09 09:10:49,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 09:10:49,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:10:49,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 09:10:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 09:10:49,097 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-12-09 09:10:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:49,111 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 09:10:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 09:10:49,113 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 09:10:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:49,120 INFO L225 Difference]: With dead ends: 21 [2020-12-09 09:10:49,121 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 09:10:49,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 09:10:49,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 09:10:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 09:10:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 09:10:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-12-09 09:10:49,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2020-12-09 09:10:49,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:49,153 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-12-09 09:10:49,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 09:10:49,153 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-12-09 09:10:49,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:10:49,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:49,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:10:49,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 09:10:49,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:49,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:49,356 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2020-12-09 09:10:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:10:49,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875661620] [2020-12-09 09:10:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:49,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 09:10:49,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:49,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:10:49,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875661620] [2020-12-09 09:10:49,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:10:49,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:10:49,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88890552] [2020-12-09 09:10:49,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:10:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:10:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:10:49,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:10:49,414 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2020-12-09 09:10:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:49,424 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-09 09:10:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:10:49,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:10:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:49,425 INFO L225 Difference]: With dead ends: 16 [2020-12-09 09:10:49,425 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 09:10:49,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:10:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 09:10:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2020-12-09 09:10:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 09:10:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-09 09:10:49,428 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2020-12-09 09:10:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:49,428 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-09 09:10:49,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:10:49,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-09 09:10:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 09:10:49,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:49,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:10:49,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 09:10:49,630 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2020-12-09 09:10:49,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:10:49,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357160097] [2020-12-09 09:10:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:49,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 09:10:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:49,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:10:49,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357160097] [2020-12-09 09:10:49,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:10:49,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 09:10:49,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177862782] [2020-12-09 09:10:49,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:10:49,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:10:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:10:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:10:49,718 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2020-12-09 09:10:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:49,749 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-09 09:10:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:10:49,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-09 09:10:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:49,750 INFO L225 Difference]: With dead ends: 24 [2020-12-09 09:10:49,750 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 09:10:49,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:10:49,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 09:10:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2020-12-09 09:10:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 09:10:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-12-09 09:10:49,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-12-09 09:10:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:49,753 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-12-09 09:10:49,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:10:49,753 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-12-09 09:10:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 09:10:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:49,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:10:49,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 09:10:49,956 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:49,958 INFO L82 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2020-12-09 09:10:49,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:10:49,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748201126] [2020-12-09 09:10:49,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:50,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 09:10:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:50,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:50,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:50,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748201126] [2020-12-09 09:10:50,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [107092686] [2020-12-09 09:10:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:10:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:50,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 09:10:50,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:50,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:50,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:50,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4067751] [2020-12-09 09:10:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 09:10:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:50,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:50,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 09:10:50,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2020-12-09 09:10:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640203001] [2020-12-09 09:10:50,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 09:10:50,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:10:50,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 09:10:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 09:10:50,235 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2020-12-09 09:10:50,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:50,267 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2020-12-09 09:10:50,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 09:10:50,268 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-09 09:10:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:50,269 INFO L225 Difference]: With dead ends: 23 [2020-12-09 09:10:50,269 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 09:10:50,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-09 09:10:50,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 09:10:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 09:10:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 09:10:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 09:10:50,273 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2020-12-09 09:10:50,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:50,273 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 09:10:50,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 09:10:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 09:10:50,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 09:10:50,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:50,274 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:10:50,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:10:50,877 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:50,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1843204080, now seen corresponding path program 1 times [2020-12-09 09:10:50,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:10:50,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565265226] [2020-12-09 09:10:50,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 09:10:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 09:10:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 09:10:51,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565265226] [2020-12-09 09:10:51,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [661896779] [2020-12-09 09:10:51,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:10:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:51,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 09:10:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:51,099 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 09:10:51,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 09:10:51,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287639270] [2020-12-09 09:10:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:51,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 09:10:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:51,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:51,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 09:10:51,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 9, 10] total 23 [2020-12-09 09:10:51,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945332547] [2020-12-09 09:10:51,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-09 09:10:51,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:10:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-09 09:10:51,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2020-12-09 09:10:51,512 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 23 states. [2020-12-09 09:10:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:10:52,319 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-12-09 09:10:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-09 09:10:52,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2020-12-09 09:10:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:10:52,321 INFO L225 Difference]: With dead ends: 64 [2020-12-09 09:10:52,321 INFO L226 Difference]: Without dead ends: 52 [2020-12-09 09:10:52,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2020-12-09 09:10:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-09 09:10:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-12-09 09:10:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 09:10:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2020-12-09 09:10:52,327 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 18 [2020-12-09 09:10:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:10:52,328 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2020-12-09 09:10:52,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-09 09:10:52,328 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2020-12-09 09:10:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 09:10:52,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:10:52,328 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2020-12-09 09:10:52,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:10:52,930 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:10:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:10:52,932 INFO L82 PathProgramCache]: Analyzing trace with hash -29656432, now seen corresponding path program 2 times [2020-12-09 09:10:52,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:10:52,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192297217] [2020-12-09 09:10:52,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:10:52,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 09:10:52,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 09:10:53,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 09:10:53,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192297217] [2020-12-09 09:10:53,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [665802879] [2020-12-09 09:10:53,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:10:53,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 09:10:53,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:10:53,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 09:10:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 09:10:53,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 09:10:53,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064660981] [2020-12-09 09:10:53,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/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 [2020-12-09 09:10:53,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-09 09:10:53,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:10:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 09:10:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:10:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:54,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:10:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:10:55,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 09:10:55,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 19, 20] total 49 [2020-12-09 09:10:55,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58791269] [2020-12-09 09:10:55,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-09 09:10:55,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:10:55,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-09 09:10:55,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2020-12-09 09:10:55,569 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 49 states. [2020-12-09 09:10:56,183 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 108 [2020-12-09 09:10:56,568 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2020-12-09 09:10:57,059 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2020-12-09 09:10:57,588 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 114 [2020-12-09 09:10:58,066 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2020-12-09 09:10:58,743 WARN L197 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2020-12-09 09:10:59,680 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 123 [2020-12-09 09:11:00,434 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-12-09 09:11:00,999 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 124 [2020-12-09 09:11:01,384 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-12-09 09:11:02,007 WARN L197 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 125 [2020-12-09 09:11:02,537 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2020-12-09 09:11:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:11:04,473 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2020-12-09 09:11:04,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-09 09:11:04,473 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 30 [2020-12-09 09:11:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:11:04,474 INFO L225 Difference]: With dead ends: 118 [2020-12-09 09:11:04,474 INFO L226 Difference]: Without dead ends: 102 [2020-12-09 09:11:04,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 120 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1566, Invalid=6090, Unknown=0, NotChecked=0, Total=7656 [2020-12-09 09:11:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-09 09:11:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-12-09 09:11:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-09 09:11:04,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2020-12-09 09:11:04,487 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 30 [2020-12-09 09:11:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:11:04,488 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2020-12-09 09:11:04,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-09 09:11:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2020-12-09 09:11:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 09:11:04,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:11:04,489 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 09:11:05,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3,12 cvc4 --incremental --print-success --lang smt [2020-12-09 09:11:05,091 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 09:11:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:11:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -86914734, now seen corresponding path program 3 times [2020-12-09 09:11:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:11:05,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277792433] [2020-12-09 09:11:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 09:11:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:11:05,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 09:11:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:11:05,199 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:11:05,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:11:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:11:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277792433] [2020-12-09 09:11:05,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [496040856] [2020-12-09 09:11:05,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:11:05,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 09:11:05,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:11:05,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 09:11:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:11:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-09 09:11:05,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:11:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-09 09:11:05,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136038238] [2020-12-09 09:11:05,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:11:05,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 09:11:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 09:11:05,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 09:11:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:11:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-09 09:11:05,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:11:05,952 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-09 09:11:05,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 09:11:05,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6, 6, 6, 6] total 27 [2020-12-09 09:11:05,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851903201] [2020-12-09 09:11:05,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 09:11:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:11:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 09:11:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-12-09 09:11:05,953 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 27 states. [2020-12-09 09:11:06,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:11:06,203 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2020-12-09 09:11:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 09:11:06,204 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-12-09 09:11:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:11:06,204 INFO L225 Difference]: With dead ends: 91 [2020-12-09 09:11:06,204 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 09:11:06,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 09:11:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 09:11:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 09:11:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 09:11:06,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 09:11:06,206 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-12-09 09:11:06,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:11:06,206 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 09:11:06,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 09:11:06,206 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 09:11:06,206 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 09:11:06,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt [2020-12-09 09:11:06,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 09:11:07,020 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2020-12-09 09:11:07,022 INFO L265 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 09:11:07,022 INFO L258 CegarLoopResult]: At program point L23-2(lines 23 30) the Hoare annotation is: (let ((.cse0 (= (_ bv37 8) ULTIMATE.start_main_~y~0)) (.cse2 (not (= (_ bv0 32) ((_ zero_extend 24) ULTIMATE.start_main_~bit~0)))) (.cse4 (= (_ bv5 8) ULTIMATE.start_main_~y~0)) (.cse5 (= ULTIMATE.start_main_~bit~0 (_ bv0 8))) (.cse3 (= (_ bv1 8) ULTIMATE.start_main_~y~0)) (.cse1 (= (_ bv37 8) ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 (= (_ bv8 8) ULTIMATE.start_main_~c~0)) (and .cse2 (= (_ bv1 8) ULTIMATE.start_main_~c~0) .cse1 .cse3) (and .cse4 .cse5 .cse1 (= (_ bv5 8) ULTIMATE.start_main_~c~0)) (and .cse0 (= (_ bv7 8) ULTIMATE.start_main_~c~0) .cse5 .cse1) (and .cse0 .cse2 (= (_ bv6 8) ULTIMATE.start_main_~c~0) .cse1) (and .cse4 (= (_ bv3 8) ULTIMATE.start_main_~c~0) (= (_ bv0 8) (bvadd ULTIMATE.start_main_~bit~0 (_ bv252 8))) .cse1) (and .cse4 .cse5 (= (_ bv4 8) ULTIMATE.start_main_~c~0) .cse1) (and (= (_ bv2 8) ULTIMATE.start_main_~c~0) .cse5 .cse1 .cse3) (and (= (_ bv0 8) ULTIMATE.start_main_~c~0) .cse1 (= (_ bv0 8) ULTIMATE.start_main_~y~0)))) [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point L23-3(lines 23 30) no Hoare annotation was computed. [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-12-09 09:11:07,022 INFO L265 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2020-12-09 09:11:07,022 INFO L262 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2020-12-09 09:11:07,023 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-12-09 09:11:07,023 INFO L262 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-12-09 09:11:07,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:11:07 BoogieIcfgContainer [2020-12-09 09:11:07,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:11:07,035 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:11:07,035 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:11:07,035 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:11:07,035 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:10:48" (3/4) ... [2020-12-09 09:11:07,037 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 09:11:07,043 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 09:11:07,043 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 09:11:07,043 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 09:11:07,043 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 09:11:07,066 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_541c81a2-d5ea-419b-a133-704251836ce4/bin/utaipan/witness.graphml [2020-12-09 09:11:07,066 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:11:07,067 INFO L168 Benchmark]: Toolchain (without parser) took 18656.71 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 48.8 MB in the beginning and 21.1 MB in the end (delta: 27.7 MB). Peak memory consumption was 41.0 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:07,067 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 84.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:11:07,067 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.48 ms. Allocated memory is still 67.1 MB. Free memory was 48.6 MB in the beginning and 38.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:07,068 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.49 ms. Allocated memory is still 67.1 MB. Free memory was 38.7 MB in the beginning and 51.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:07,068 INFO L168 Benchmark]: Boogie Preprocessor took 22.44 ms. Allocated memory is still 67.1 MB. Free memory was 51.9 MB in the beginning and 50.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:07,068 INFO L168 Benchmark]: RCFGBuilder took 240.82 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 39.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:07,069 INFO L168 Benchmark]: TraceAbstraction took 18154.10 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 38.8 MB in the beginning and 23.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:07,069 INFO L168 Benchmark]: Witness Printer took 31.34 ms. Allocated memory is still 81.8 MB. Free memory was 23.2 MB in the beginning and 21.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:11:07,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 50.0 MB in the end (delta: 84.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 170.48 ms. Allocated memory is still 67.1 MB. Free memory was 48.6 MB in the beginning and 38.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.49 ms. Allocated memory is still 67.1 MB. Free memory was 38.7 MB in the beginning and 51.9 MB in the end (delta: -13.2 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.44 ms. Allocated memory is still 67.1 MB. Free memory was 51.9 MB in the beginning and 50.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 240.82 ms. Allocated memory is still 67.1 MB. Free memory was 50.8 MB in the beginning and 39.1 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 18154.10 ms. Allocated memory was 67.1 MB in the beginning and 81.8 MB in the end (delta: 14.7 MB). Free memory was 38.8 MB in the beginning and 23.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 31.7 MB. Max. memory is 16.1 GB. * Witness Printer took 31.34 ms. Allocated memory is still 81.8 MB. Free memory was 23.2 MB in the beginning and 21.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((((37bv8 == y && 37bv8 == x) && 8bv8 == c) || (((!(0bv32 == ~zero_extendFrom8To32(bit)) && 1bv8 == c) && 37bv8 == x) && 1bv8 == y)) || (((5bv8 == y && bit == 0bv8) && 37bv8 == x) && 5bv8 == c)) || (((37bv8 == y && 7bv8 == c) && bit == 0bv8) && 37bv8 == x)) || (((37bv8 == y && !(0bv32 == ~zero_extendFrom8To32(bit))) && 6bv8 == c) && 37bv8 == x)) || (((5bv8 == y && 3bv8 == c) && 0bv8 == ~bvadd64(bit, 252bv8)) && 37bv8 == x)) || (((5bv8 == y && bit == 0bv8) && 4bv8 == c) && 37bv8 == x)) || (((2bv8 == c && bit == 0bv8) && 37bv8 == x) && 1bv8 == y)) || ((0bv8 == c && 37bv8 == x) && 0bv8 == y) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.8s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 10.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 391 SDslu, 299 SDs, 0 SdLazy, 1112 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 404 SyntacticMatches, 11 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 12.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 120 HoareAnnotationTreeSize, 3 FomulaSimplifications, 142 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 234 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 282 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 516 ConstructedInterpolants, 46 QuantifiedInterpolants, 198933 SizeOfPredicates, 56 NumberOfNonLiveVariables, 718 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 27 InterpolantComputations, 3 PerfectInterpolantSequences, 399/1243 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...