./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn2.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_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 d20f6aec4b57847edb8f89ecab5891521e565e39 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 d20f6aec4b57847edb8f89ecab5891521e565e39 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 20:10:33,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 20:10:33,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 20:10:33,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 20:10:33,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 20:10:33,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 20:10:33,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 20:10:33,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 20:10:33,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 20:10:33,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 20:10:33,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 20:10:33,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 20:10:33,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 20:10:33,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 20:10:33,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 20:10:33,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 20:10:33,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 20:10:33,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 20:10:33,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 20:10:33,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 20:10:33,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 20:10:33,126 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 20:10:33,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 20:10:33,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 20:10:33,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 20:10:33,131 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 20:10:33,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 20:10:33,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 20:10:33,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 20:10:33,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 20:10:33,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 20:10:33,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 20:10:33,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 20:10:33,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 20:10:33,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 20:10:33,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 20:10:33,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 20:10:33,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 20:10:33,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 20:10:33,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 20:10:33,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 20:10:33,142 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 20:10:33,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 20:10:33,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 20:10:33,165 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 20:10:33,165 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 20:10:33,166 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 20:10:33,166 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 20:10:33,166 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 20:10:33,166 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 20:10:33,166 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 20:10:33,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 20:10:33,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 20:10:33,167 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 20:10:33,167 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 20:10:33,167 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 20:10:33,167 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 20:10:33,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 20:10:33,168 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 20:10:33,168 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 20:10:33,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 20:10:33,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 20:10:33,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 20:10:33,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 20:10:33,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 20:10:33,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 20:10:33,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 20:10:33,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 20:10:33,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 20:10:33,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 20:10:33,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 20:10:33,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 20:10:33,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 20:10:33,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 20:10:33,170 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_1bcd0dac-7578-4617-9b58-c1cc974a928d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d20f6aec4b57847edb8f89ecab5891521e565e39 [2020-12-09 20:10:33,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:10:33,350 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:10:33,352 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:10:33,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:10:33,353 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:10:33,354 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/../../sv-benchmarks/c/array-fpi/ifeqn2.c [2020-12-09 20:10:33,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/f8404ac70/f1e4b49f10c0485db91499d54e77728c/FLAG115a002a3 [2020-12-09 20:10:33,747 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:10:33,747 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/sv-benchmarks/c/array-fpi/ifeqn2.c [2020-12-09 20:10:33,752 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/f8404ac70/f1e4b49f10c0485db91499d54e77728c/FLAG115a002a3 [2020-12-09 20:10:33,761 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/f8404ac70/f1e4b49f10c0485db91499d54e77728c [2020-12-09 20:10:33,763 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:10:33,764 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:10:33,765 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:10:33,765 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:10:33,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:10:33,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25ac0836 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33, skipping insertion in model container [2020-12-09 20:10:33,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:10:33,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:10:33,891 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_1bcd0dac-7578-4617-9b58-c1cc974a928d/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2020-12-09 20:10:33,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:10:33,909 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:10:33,917 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_1bcd0dac-7578-4617-9b58-c1cc974a928d/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2020-12-09 20:10:33,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:10:33,933 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:10:33,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33 WrapperNode [2020-12-09 20:10:33,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:10:33,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:10:33,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:10:33,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:10:33,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,945 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,958 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:10:33,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:10:33,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:10:33,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:10:33,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,966 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... [2020-12-09 20:10:33,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:10:33,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:10:33,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:10:33,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:10:33,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 20:10:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:10:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 20:10:34,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 20:10:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:10:34,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:10:34,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 20:10:34,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:10:34,323 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 20:10:34,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:34 BoogieIcfgContainer [2020-12-09 20:10:34,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:10:34,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:10:34,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:10:34,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:10:34,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:10:33" (1/3) ... [2020-12-09 20:10:34,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72bf9b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:10:34, skipping insertion in model container [2020-12-09 20:10:34,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:33" (2/3) ... [2020-12-09 20:10:34,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72bf9b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:10:34, skipping insertion in model container [2020-12-09 20:10:34,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:34" (3/3) ... [2020-12-09 20:10:34,332 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2020-12-09 20:10:34,342 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:10:34,344 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 20:10:34,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 20:10:34,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:10:34,371 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:10:34,371 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:10:34,371 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:10:34,371 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:10:34,372 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:10:34,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:10:34,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:10:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 20:10:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 20:10:34,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:34,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:34,386 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2020-12-09 20:10:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:10:34,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000838981] [2020-12-09 20:10:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:10:34,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:10:34,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275657510] [2020-12-09 20:10:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:34,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:10:34,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:34,576 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 20:10:34,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:34,591 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 20:10:34,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000838981] [2020-12-09 20:10:34,591 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:10:34,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275657510] [2020-12-09 20:10:34,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:10:34,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 20:10:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540285439] [2020-12-09 20:10:34,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 20:10:34,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:10:34,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 20:10:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:10:34,611 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-09 20:10:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:34,670 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-12-09 20:10:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 20:10:34,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 20:10:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:34,677 INFO L225 Difference]: With dead ends: 20 [2020-12-09 20:10:34,677 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 20:10:34,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 20:10:34,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 20:10:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 20:10:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 20:10:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-09 20:10:34,699 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-09 20:10:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:34,699 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-09 20:10:34,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 20:10:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-09 20:10:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 20:10:34,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:34,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:34,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 20:10:34,902 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:34,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2020-12-09 20:10:34,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:10:34,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259292283] [2020-12-09 20:10:34,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:10:34,982 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:10:34,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227341908] [2020-12-09 20:10:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:35,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 20:10:35,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:10:35,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:10:35,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259292283] [2020-12-09 20:10:35,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:10:35,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227341908] [2020-12-09 20:10:35,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:10:35,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 20:10:35,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472225806] [2020-12-09 20:10:35,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:10:35,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:10:35,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:10:35,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:10:35,106 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2020-12-09 20:10:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:35,145 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 20:10:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:10:35,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 20:10:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:35,145 INFO L225 Difference]: With dead ends: 21 [2020-12-09 20:10:35,145 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 20:10:35,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:10:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 20:10:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-12-09 20:10:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 20:10:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-09 20:10:35,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-09 20:10:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:35,149 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-09 20:10:35,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:10:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-09 20:10:35,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 20:10:35,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:35,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:35,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:35,351 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:35,353 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2020-12-09 20:10:35,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:10:35,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176096984] [2020-12-09 20:10:35,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:10:35,452 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:10:35,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011122191] [2020-12-09 20:10:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:35,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:35,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 20:10:35,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:35,584 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 20:10:35,585 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:10:35,586 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:10:35,587 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:10:35,587 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 20:10:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:10:35,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:35,625 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-09 20:10:35,625 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:10:35,676 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:10:35,677 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:10:35,678 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:10:35,684 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:10:35,715 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:10:35,715 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 47 [2020-12-09 20:10:35,716 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 20:10:35,721 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2020-12-09 20:10:35,741 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~i~0 4294967296))) (let ((.cse1 (<= .cse14 2147483647)) (.cse7 (<= .cse13 2147483647)) (.cse0 (= c_ULTIMATE.start_main_~i~0 0)) (.cse10 (< 2147483647 .cse14)) (.cse2 (< 2147483647 .cse13))) (and (or .cse0 .cse1 .cse2 (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_10 Int) (v_prenex_8 (Array Int (Array Int Int))) (v_prenex_9 Int)) (= (select (let ((.cse3 (select v_prenex_8 v_prenex_6))) (store .cse3 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_10 (- 34359738368)) (let ((.cse4 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_8 v_prenex_7) (+ .cse4 v_prenex_9)) (select .cse3 (+ .cse4 v_prenex_10)))))) v_prenex_10) 1))) (or .cse0 .cse1 (forall ((v_prenex_15 Int) (v_prenex_12 Int) (v_prenex_13 (Array Int (Array Int Int))) (v_prenex_11 Int) (v_prenex_14 Int)) (= (select (let ((.cse5 (select v_prenex_13 v_prenex_11))) (store .cse5 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_15 (- 34359738368)) (let ((.cse6 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse5 (+ v_prenex_15 .cse6 (- 34359738368))) (select (select v_prenex_13 v_prenex_12) (+ v_prenex_14 .cse6 (- 34359738368))))))) v_prenex_15) 1)) .cse7) (or .cse0 (forall ((ULTIMATE.start_main_~b~0.base Int) (ULTIMATE.start_main_~a~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse8 (select |#memory_int| ULTIMATE.start_main_~b~0.base))) (store .cse8 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~b~0.offset) (let ((.cse9 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse8 (+ .cse9 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset .cse9 (- 34359738368))))))) ULTIMATE.start_main_~b~0.offset) 1)) .cse10 .cse7) (or (forall ((v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 (Array Int (Array Int Int))) (v_prenex_1 Int)) (= (select (let ((.cse11 (select v_prenex_3 v_prenex_1))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_5) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_3 v_prenex_2) (+ v_prenex_4 .cse12)) (select .cse11 (+ v_prenex_5 .cse12)))))) v_prenex_5) 1)) .cse0 .cse10 .cse2)))) is different from false [2020-12-09 20:10:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2020-12-09 20:10:35,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176096984] [2020-12-09 20:10:35,754 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:10:35,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011122191] [2020-12-09 20:10:35,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361154878] [2020-12-09 20:10:35,773 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:10:35,773 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:10:35,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:10:35,780 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:10:35,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:10:35,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,274 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,289 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,790 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,966 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:36,983 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:37,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:37,043 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:10:37,164 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-12-09 20:10:37,293 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-09 20:10:37,447 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 20:10:37,655 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:10:37,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 20:10:37,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2020-12-09 20:10:37,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912396311] [2020-12-09 20:10:37,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 20:10:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:10:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 20:10:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2020-12-09 20:10:37,657 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2020-12-09 20:10:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:37,901 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-12-09 20:10:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 20:10:37,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-12-09 20:10:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:37,902 INFO L225 Difference]: With dead ends: 39 [2020-12-09 20:10:37,902 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 20:10:37,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=471, Unknown=1, NotChecked=46, Total=650 [2020-12-09 20:10:37,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 20:10:37,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 14. [2020-12-09 20:10:37,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 20:10:37,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 20:10:37,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2020-12-09 20:10:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:37,907 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 20:10:37,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 20:10:37,907 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 20:10:37,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 20:10:37,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:37,907 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:38,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:38,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:38,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:38,111 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2020-12-09 20:10:38,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:10:38,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813694372] [2020-12-09 20:10:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:10:38,142 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:10:38,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418552784] [2020-12-09 20:10:38,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:38,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 20:10:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:10:38,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:10:38,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:10:38,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:10:38,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813694372] [2020-12-09 20:10:38,234 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:10:38,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418552784] [2020-12-09 20:10:38,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [815407877] [2020-12-09 20:10:38,236 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:10:38,236 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:10:38,236 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:10:38,236 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:10:38,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:10:38,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:38,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:39,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:39,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:39,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 20:10:39,104 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 20:10:39,214 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-12-09 20:10:41,581 WARN L197 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-12-09 20:10:41,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:10:41,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 20:10:41,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-09 20:10:41,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848019800] [2020-12-09 20:10:41,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 20:10:41,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 20:10:41,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 20:10:41,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-09 20:10:41,583 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2020-12-09 20:10:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:41,686 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 20:10:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 20:10:41,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 20:10:41,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:41,687 INFO L225 Difference]: With dead ends: 35 [2020-12-09 20:10:41,688 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 20:10:41,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-09 20:10:41,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 20:10:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2020-12-09 20:10:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 20:10:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-09 20:10:41,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2020-12-09 20:10:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:41,690 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-09 20:10:41,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 20:10:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-09 20:10:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 20:10:41,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:41,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:41,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:41,893 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2020-12-09 20:10:41,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 20:10:41,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164580302] [2020-12-09 20:10:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 20:10:41,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 20:10:41,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428366914] [2020-12-09 20:10:41,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:42,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 20:10:42,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 20:10:42,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-09 20:10:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:10:42,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:42,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164580302] [2020-12-09 20:10:42,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 20:10:42,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428366914] [2020-12-09 20:10:42,395 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 20:10:42,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982403123] [2020-12-09 20:10:42,397 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 20:10:42,397 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 20:10:42,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 20:10:42,398 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 20:10:42,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 20:10:42,405 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2011909a at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 20:10:42,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:10:42,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 20:10:42,407 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 20:10:42,407 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:10:42,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:42,623 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 20:10:42,623 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 20:10:42,624 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 20:10:42,624 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 20:10:42,624 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 20:10:42,625 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 20:10:42,625 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 20:10:42,625 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 20:10:42,626 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 20:10:42,626 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 20:10:42,627 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 20:10:42,627 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 20:10:42,627 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 20:10:42,628 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 20:10:42,650 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 20:10:42,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:10:42 BoogieIcfgContainer [2020-12-09 20:10:42,650 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:10:42,651 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:10:42,651 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:10:42,651 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:10:42,652 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:34" (3/4) ... [2020-12-09 20:10:42,656 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 20:10:42,656 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:10:42,657 INFO L168 Benchmark]: Toolchain (without parser) took 8892.66 ms. Allocated memory was 117.4 MB in the beginning and 207.6 MB in the end (delta: 90.2 MB). Free memory was 85.3 MB in the beginning and 136.5 MB in the end (delta: -51.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:42,657 INFO L168 Benchmark]: CDTParser took 4.89 ms. Allocated memory is still 73.4 MB. Free memory was 32.8 MB in the beginning and 47.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:42,658 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.24 ms. Allocated memory is still 117.4 MB. Free memory was 85.3 MB in the beginning and 94.3 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:42,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.21 ms. Allocated memory is still 117.4 MB. Free memory was 94.3 MB in the beginning and 92.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:42,659 INFO L168 Benchmark]: Boogie Preprocessor took 18.40 ms. Allocated memory is still 117.4 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:42,659 INFO L168 Benchmark]: RCFGBuilder took 346.56 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 64.2 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:42,660 INFO L168 Benchmark]: TraceAbstraction took 8324.81 ms. Allocated memory was 117.4 MB in the beginning and 207.6 MB in the end (delta: 90.2 MB). Free memory was 64.2 MB in the beginning and 136.5 MB in the end (delta: -72.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:42,660 INFO L168 Benchmark]: Witness Printer took 4.79 ms. Allocated memory is still 207.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:10:42,662 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 4.89 ms. Allocated memory is still 73.4 MB. Free memory was 32.8 MB in the beginning and 47.7 MB in the end (delta: -14.9 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 169.24 ms. Allocated memory is still 117.4 MB. Free memory was 85.3 MB in the beginning and 94.3 MB in the end (delta: -9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.21 ms. Allocated memory is still 117.4 MB. Free memory was 94.3 MB in the beginning and 92.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.40 ms. Allocated memory is still 117.4 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 346.56 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 64.2 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8324.81 ms. Allocated memory was 117.4 MB in the beginning and 207.6 MB in the end (delta: 90.2 MB). Free memory was 64.2 MB in the beginning and 136.5 MB in the end (delta: -72.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.79 ms. Allocated memory is still 207.6 MB. Free memory is still 136.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 -> d20f6aec4b57847edb8f89ecab5891521e565e39 [2020-12-09 20:10:44,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 20:10:44,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 20:10:44,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 20:10:44,594 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 20:10:44,595 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 20:10:44,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/../../sv-benchmarks/c/array-fpi/ifeqn2.c [2020-12-09 20:10:44,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/d8a91ff75/81eedee2fb9742f685b61fbc6b59a483/FLAG0781a5e04 [2020-12-09 20:10:45,005 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 20:10:45,005 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/sv-benchmarks/c/array-fpi/ifeqn2.c [2020-12-09 20:10:45,012 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/d8a91ff75/81eedee2fb9742f685b61fbc6b59a483/FLAG0781a5e04 [2020-12-09 20:10:45,024 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/data/d8a91ff75/81eedee2fb9742f685b61fbc6b59a483 [2020-12-09 20:10:45,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 20:10:45,028 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 20:10:45,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 20:10:45,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 20:10:45,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 20:10:45,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b5e8235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45, skipping insertion in model container [2020-12-09 20:10:45,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 20:10:45,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 20:10:45,155 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_1bcd0dac-7578-4617-9b58-c1cc974a928d/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2020-12-09 20:10:45,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:10:45,183 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 20:10:45,192 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_1bcd0dac-7578-4617-9b58-c1cc974a928d/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2020-12-09 20:10:45,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 20:10:45,211 INFO L208 MainTranslator]: Completed translation [2020-12-09 20:10:45,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45 WrapperNode [2020-12-09 20:10:45,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 20:10:45,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 20:10:45,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 20:10:45,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 20:10:45,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 20:10:45,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 20:10:45,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 20:10:45,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 20:10:45,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... [2020-12-09 20:10:45,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 20:10:45,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 20:10:45,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 20:10:45,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 20:10:45,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 20:10:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 20:10:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2020-12-09 20:10:45,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 20:10:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 20:10:45,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 20:10:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2020-12-09 20:10:45,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 20:10:45,655 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 20:10:45,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:45 BoogieIcfgContainer [2020-12-09 20:10:45,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 20:10:45,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 20:10:45,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 20:10:45,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 20:10:45,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:10:45" (1/3) ... [2020-12-09 20:10:45,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea59173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:10:45, skipping insertion in model container [2020-12-09 20:10:45,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:10:45" (2/3) ... [2020-12-09 20:10:45,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ea59173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:10:45, skipping insertion in model container [2020-12-09 20:10:45,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:45" (3/3) ... [2020-12-09 20:10:45,667 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2020-12-09 20:10:45,681 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 20:10:45,684 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 20:10:45,693 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 20:10:45,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 20:10:45,711 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 20:10:45,711 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 20:10:45,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 20:10:45,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 20:10:45,712 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 20:10:45,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 20:10:45,712 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 20:10:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-09 20:10:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:10:45,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:45,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:45,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-12-09 20:10:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:10:45,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543081824] [2020-12-09 20:10:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:45,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 20:10:45,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:45,865 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 20:10:45,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:10:45,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543081824] [2020-12-09 20:10:45,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:10:45,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 20:10:45,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431811111] [2020-12-09 20:10:45,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 20:10:45,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:10:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 20:10:45,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 20:10:45,888 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-09 20:10:45,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:45,899 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-09 20:10:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 20:10:45,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-09 20:10:45,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:45,905 INFO L225 Difference]: With dead ends: 42 [2020-12-09 20:10:45,905 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 20:10:45,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 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 20:10:45,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 20:10:45,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 20:10:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 20:10:45,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-09 20:10:45,930 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-09 20:10:45,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:45,930 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-09 20:10:45,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 20:10:45,930 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-09 20:10:45,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 20:10:45,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:45,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:46,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 20:10:46,132 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:46,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:46,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-12-09 20:10:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:10:46,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075148953] [2020-12-09 20:10:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 20:10:46,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:46,330 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 20:10:46,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:10:46,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075148953] [2020-12-09 20:10:46,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:10:46,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 20:10:46,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668474102] [2020-12-09 20:10:46,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 20:10:46,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:10:46,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 20:10:46,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 20:10:46,332 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-09 20:10:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:46,548 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-12-09 20:10:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 20:10:46,554 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 20:10:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:46,555 INFO L225 Difference]: With dead ends: 45 [2020-12-09 20:10:46,555 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 20:10:46,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 20:10:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 20:10:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-09 20:10:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 20:10:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 20:10:46,560 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-09 20:10:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:46,560 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 20:10:46,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 20:10:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 20:10:46,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 20:10:46,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:46,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:46,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 20:10:46,762 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-12-09 20:10:46,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:10:46,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640564739] [2020-12-09 20:10:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 20:10:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:47,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:47,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:47,013 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 20:10:47,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:10:47,024 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:10:47,024 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:10:47,025 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2020-12-09 20:10:47,087 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 20:10:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 20:10:47,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 20:10:47,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640564739] [2020-12-09 20:10:47,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:10:47,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 20:10:47,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420330309] [2020-12-09 20:10:47,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 20:10:47,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:10:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 20:10:47,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 20:10:47,109 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-12-09 20:10:47,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:47,353 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-12-09 20:10:47,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 20:10:47,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 20:10:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:47,355 INFO L225 Difference]: With dead ends: 40 [2020-12-09 20:10:47,355 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 20:10:47,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 20:10:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 20:10:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-12-09 20:10:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 20:10:47,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-09 20:10:47,362 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-12-09 20:10:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:47,362 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-09 20:10:47,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 20:10:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-09 20:10:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 20:10:47,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:47,363 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:47,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 20:10:47,564 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:47,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2020-12-09 20:10:47,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:10:47,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468167902] [2020-12-09 20:10:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 20:10:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:10:47,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:10:48,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468167902] [2020-12-09 20:10:48,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555869202] [2020-12-09 20:10:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/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 20:10:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 20:10:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:10:48,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 20:10:48,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 20:10:48,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 8] total 18 [2020-12-09 20:10:48,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208187903] [2020-12-09 20:10:48,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 20:10:48,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 20:10:48,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 20:10:48,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-09 20:10:48,337 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2020-12-09 20:10:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 20:10:49,005 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-12-09 20:10:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 20:10:49,010 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-09 20:10:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 20:10:49,011 INFO L225 Difference]: With dead ends: 60 [2020-12-09 20:10:49,011 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 20:10:49,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2020-12-09 20:10:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 20:10:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-12-09 20:10:49,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 20:10:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 20:10:49,017 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2020-12-09 20:10:49,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 20:10:49,017 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 20:10:49,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 20:10:49,017 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 20:10:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 20:10:49,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 20:10:49,017 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 20:10:49,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt [2020-12-09 20:10:49,420 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 20:10:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 20:10:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2020-12-09 20:10:49,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 20:10:49,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901827094] [2020-12-09 20:10:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 20:10:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 20:10:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:49,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 20:10:49,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:10:49,666 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 20:10:49,667 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 20:10:49,667 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2020-12-09 20:10:49,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,740 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:10:49,741 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:10:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 20:10:49,743 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:10:49,744 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 20:10:49,783 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2020-12-09 20:10:49,783 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 165 [2020-12-09 20:10:49,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 20:10:49,844 INFO L625 ElimStorePlain]: treesize reduction 107, result has 60.1 percent of original size [2020-12-09 20:10:49,845 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 20:10:49,845 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:187, output treesize:161 [2020-12-09 20:10:49,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 20:10:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 20:10:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 20:10:50,767 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-12-09 20:10:55,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901827094] [2020-12-09 20:10:55,658 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 20:10:55,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [564349055] [2020-12-09 20:10:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 20:10:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 20:10:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:55,870 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41bfec3b [2020-12-09 20:10:55,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912088105] [2020-12-09 20:10:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1bcd0dac-7578-4617-9b58-c1cc974a928d/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 20:10:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 20:10:55,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 20:10:55,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 20:10:55,968 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@41bfec3b [2020-12-09 20:10:55,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 20:10:55,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 20:10:55,969 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 20:10:55,969 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 20:10:56,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 20:10:56,591 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 20:10:56,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:10:56 BoogieIcfgContainer [2020-12-09 20:10:56,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 20:10:56,592 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 20:10:56,592 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 20:10:56,592 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 20:10:56,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:10:45" (3/4) ... [2020-12-09 20:10:56,594 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 20:10:56,595 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 20:10:56,596 INFO L168 Benchmark]: Toolchain (without parser) took 11567.28 ms. Allocated memory was 58.7 MB in the beginning and 92.3 MB in the end (delta: 33.6 MB). Free memory was 40.3 MB in the beginning and 43.8 MB in the end (delta: -3.5 MB). Peak memory consumption was 29.2 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:56,596 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory is still 41.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:10:56,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.72 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 29.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:56,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.22 ms. Allocated memory is still 58.7 MB. Free memory was 29.1 MB in the beginning and 42.4 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:56,597 INFO L168 Benchmark]: Boogie Preprocessor took 22.03 ms. Allocated memory is still 58.7 MB. Free memory was 42.4 MB in the beginning and 41.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:10:56,598 INFO L168 Benchmark]: RCFGBuilder took 378.59 ms. Allocated memory was 58.7 MB in the beginning and 92.3 MB in the end (delta: 33.6 MB). Free memory was 41.0 MB in the beginning and 73.2 MB in the end (delta: -32.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:56,598 INFO L168 Benchmark]: TraceAbstraction took 10932.17 ms. Allocated memory is still 92.3 MB. Free memory was 72.8 MB in the beginning and 43.8 MB in the end (delta: 29.0 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. [2020-12-09 20:10:56,599 INFO L168 Benchmark]: Witness Printer took 3.01 ms. Allocated memory is still 92.3 MB. Free memory is still 43.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 20:10:56,601 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 58.7 MB. Free memory is still 41.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 182.72 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 29.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.22 ms. Allocated memory is still 58.7 MB. Free memory was 29.1 MB in the beginning and 42.4 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.03 ms. Allocated memory is still 58.7 MB. Free memory was 42.4 MB in the beginning and 41.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 378.59 ms. Allocated memory was 58.7 MB in the beginning and 92.3 MB in the end (delta: 33.6 MB). Free memory was 41.0 MB in the beginning and 73.2 MB in the end (delta: -32.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10932.17 ms. Allocated memory is still 92.3 MB. Free memory was 72.8 MB in the beginning and 43.8 MB in the end (delta: 29.0 MB). Peak memory consumption was 28.8 MB. Max. memory is 16.1 GB. * Witness Printer took 3.01 ms. Allocated memory is still 92.3 MB. Free memory is still 43.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] long long i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i