./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/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 8770e865452d763f6a1ae70a92c5caf41552c1e5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:33:52,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:33:52,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:33:52,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:33:52,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:33:52,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:33:52,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:33:52,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:33:52,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:33:52,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:33:52,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:33:52,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:33:52,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:33:52,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:33:52,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:33:52,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:33:52,795 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:33:52,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:33:52,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:33:52,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:33:52,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:33:52,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:33:52,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:33:52,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:33:52,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:33:52,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:33:52,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:33:52,841 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:33:52,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:33:52,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:33:52,843 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:33:52,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:33:52,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:33:52,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:33:52,861 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:33:52,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:33:52,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:33:52,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:33:52,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:33:52,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:33:52,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:33:52,867 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-28 07:33:52,909 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:33:52,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:33:52,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:33:52,911 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:33:52,912 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:33:52,912 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:33:52,912 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:33:52,912 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:33:52,913 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:33:52,913 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:33:52,913 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:33:52,914 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:33:52,914 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:33:52,914 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:33:52,915 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:33:52,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:33:52,916 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:33:52,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:33:52,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:33:52,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:33:52,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:33:52,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:33:52,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:33:52,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:33:52,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:33:52,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:33:52,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:33:52,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:33:52,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:33:52,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:33:52,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:33:52,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:33:52,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:33:52,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:33:52,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:33:52,921 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:33:52,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:33:52,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:33:52,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:33:52,923 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:33:52,923 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_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8770e865452d763f6a1ae70a92c5caf41552c1e5 [2020-11-28 07:33:53,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:33:53,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:33:53,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:33:53,304 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:33:53,305 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:33:53,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/../../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-11-28 07:33:53,393 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/data/eeaf3843c/a4d2393c872b474d80fa0b1863c56109/FLAG753479913 [2020-11-28 07:33:53,981 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:33:53,982 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-11-28 07:33:53,991 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/data/eeaf3843c/a4d2393c872b474d80fa0b1863c56109/FLAG753479913 [2020-11-28 07:33:54,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/data/eeaf3843c/a4d2393c872b474d80fa0b1863c56109 [2020-11-28 07:33:54,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:33:54,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:33:54,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:33:54,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:33:54,343 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:33:54,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e90a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54, skipping insertion in model container [2020-11-28 07:33:54,347 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:33:54,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:33:54,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:33:54,700 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:33:54,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:33:54,762 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:33:54,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54 WrapperNode [2020-11-28 07:33:54,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:33:54,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:33:54,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:33:54,765 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:33:54,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,787 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:33:54,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:33:54,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:33:54,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:33:54,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,852 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... [2020-11-28 07:33:54,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:33:54,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:33:54,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:33:54,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:33:54,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:33:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:33:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:33:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:33:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:33:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2020-11-28 07:33:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:33:54,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:33:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:33:55,842 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:33:55,843 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-11-28 07:33:55,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:33:55 BoogieIcfgContainer [2020-11-28 07:33:55,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:33:55,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:33:55,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:33:55,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:33:55,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:33:54" (1/3) ... [2020-11-28 07:33:55,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c27a73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:33:55, skipping insertion in model container [2020-11-28 07:33:55,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:33:54" (2/3) ... [2020-11-28 07:33:55,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c27a73d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:33:55, skipping insertion in model container [2020-11-28 07:33:55,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:33:55" (3/3) ... [2020-11-28 07:33:55,859 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2020-11-28 07:33:55,879 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:33:55,884 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 07:33:55,899 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 07:33:55,941 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:33:55,944 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:33:55,944 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:33:55,945 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:33:55,945 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:33:55,946 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:33:55,946 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:33:55,946 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:33:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-28 07:33:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:33:55,969 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:33:55,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:33:55,970 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:33:55,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:33:55,977 INFO L82 PathProgramCache]: Analyzing trace with hash -276835480, now seen corresponding path program 1 times [2020-11-28 07:33:55,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:33:55,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237280442] [2020-11-28 07:33:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:33:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:33:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:33:56,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237280442] [2020-11-28 07:33:56,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:33:56,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:33:56,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416248539] [2020-11-28 07:33:56,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:33:56,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:33:56,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:33:56,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:33:56,311 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-11-28 07:33:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:33:56,337 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2020-11-28 07:33:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:33:56,340 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-11-28 07:33:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:33:56,361 INFO L225 Difference]: With dead ends: 41 [2020-11-28 07:33:56,361 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:33:56,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:33:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:33:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:33:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:33:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-28 07:33:56,408 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-11-28 07:33:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:33:56,409 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-28 07:33:56,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:33:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-28 07:33:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:33:56,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:33:56,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:33:56,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:33:56,411 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:33:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:33:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1886433394, now seen corresponding path program 1 times [2020-11-28 07:33:56,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:33:56,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151991977] [2020-11-28 07:33:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:33:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:33:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:33:56,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151991977] [2020-11-28 07:33:56,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:33:56,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:33:56,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840825199] [2020-11-28 07:33:56,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:33:56,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:33:56,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:33:56,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:33:56,718 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2020-11-28 07:33:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:33:56,951 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-11-28 07:33:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:33:56,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-28 07:33:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:33:56,953 INFO L225 Difference]: With dead ends: 46 [2020-11-28 07:33:56,953 INFO L226 Difference]: Without dead ends: 43 [2020-11-28 07:33:56,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:33:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-28 07:33:56,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2020-11-28 07:33:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 07:33:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-28 07:33:56,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 14 [2020-11-28 07:33:56,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:33:56,969 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-28 07:33:56,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:33:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-11-28 07:33:56,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:33:56,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:33:56,972 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:33:56,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:33:56,973 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:33:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:33:56,977 INFO L82 PathProgramCache]: Analyzing trace with hash 906667649, now seen corresponding path program 1 times [2020-11-28 07:33:56,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:33:56,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682569768] [2020-11-28 07:33:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:33:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:33:57,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:33:57,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682569768] [2020-11-28 07:33:57,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425360030] [2020-11-28 07:33:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:33:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:33:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 07:33:57,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:33:57,574 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-11-28 07:33:57,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,766 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,814 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 07:33:57,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,818 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-11-28 07:33:57,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 07:33:57,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:57,859 INFO L441 ElimStorePlain]: Different costs {0=[v_prenex_4, v_prenex_1], 6=[v_prenex_7, |#memory_int|]} [2020-11-28 07:33:57,884 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2020-11-28 07:33:57,886 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:57,954 INFO L625 ElimStorePlain]: treesize reduction 140, result has 17.2 percent of original size [2020-11-28 07:33:57,959 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2020-11-28 07:33:57,961 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:57,981 INFO L625 ElimStorePlain]: treesize reduction 10, result has 47.4 percent of original size [2020-11-28 07:33:57,982 INFO L513 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2020-11-28 07:33:57,982 INFO L513 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2020-11-28 07:33:57,982 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:33:57,983 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 12 variables, input treesize:179, output treesize:9 [2020-11-28 07:33:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:33:58,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:33:58,057 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:33:58,058 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,060 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,061 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,167 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 2, 1] term [2020-11-28 07:33:58,167 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,169 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,171 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,178 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,184 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,186 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,194 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,197 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,200 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,202 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,220 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,223 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:58,282 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2020-11-28 07:33:58,285 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:58,296 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-28 07:33:58,299 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2020-11-28 07:33:58,302 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:58,318 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2020-11-28 07:33:58,321 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:58,328 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-11-28 07:33:58,330 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:58,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 07:33:58,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 07:33:58,341 INFO L384 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2020-11-28 07:33:58,343 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:58,354 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-11-28 07:33:58,356 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:58,398 INFO L625 ElimStorePlain]: treesize reduction 28, result has 47.2 percent of original size [2020-11-28 07:33:58,399 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-11-28 07:33:58,399 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:130, output treesize:20 [2020-11-28 07:33:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:33:58,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:33:58,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [7] total 16 [2020-11-28 07:33:58,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373444006] [2020-11-28 07:33:58,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 07:33:58,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:33:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 07:33:58,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:33:58,468 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 11 states. [2020-11-28 07:33:58,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:33:58,834 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2020-11-28 07:33:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 07:33:58,835 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2020-11-28 07:33:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:33:58,836 INFO L225 Difference]: With dead ends: 97 [2020-11-28 07:33:58,837 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 07:33:58,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2020-11-28 07:33:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 07:33:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 26. [2020-11-28 07:33:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 07:33:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-11-28 07:33:58,847 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2020-11-28 07:33:58,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:33:58,848 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-11-28 07:33:58,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 07:33:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-11-28 07:33:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:33:58,849 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:33:58,849 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:33:59,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:33:59,066 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:33:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:33:59,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1957873924, now seen corresponding path program 1 times [2020-11-28 07:33:59,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:33:59,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865069995] [2020-11-28 07:33:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:33:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:33:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:33:59,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865069995] [2020-11-28 07:33:59,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672755684] [2020-11-28 07:33:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:33:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:33:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 07:33:59,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:33:59,554 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-11-28 07:33:59,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,613 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,639 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,658 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-28 07:33:59,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,673 INFO L441 ElimStorePlain]: Different costs {0=[v_prenex_13, v_prenex_10], 6=[v_prenex_16, |#memory_int|]} [2020-11-28 07:33:59,680 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2020-11-28 07:33:59,681 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:33:59,764 INFO L625 ElimStorePlain]: treesize reduction 154, result has 4.3 percent of original size [2020-11-28 07:33:59,765 INFO L513 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2020-11-28 07:33:59,765 INFO L513 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2020-11-28 07:33:59,765 INFO L513 ElimStorePlain]: Eliminatee |#memory_int| vanished before elimination [2020-11-28 07:33:59,765 INFO L545 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:33:59,766 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 12 variables, input treesize:171, output treesize:7 [2020-11-28 07:33:59,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 07:33:59,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 07:33:59,792 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 07:33:59,795 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-11-28 07:33:59,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-28 07:33:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:33:59,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:33:59,868 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:59,905 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-28 07:33:59,906 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:59,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:59,907 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:59,908 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:33:59,909 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:34:00,002 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 3, 2, 1] term [2020-11-28 07:34:00,003 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:34:00,004 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:34:00,008 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:34:00,010 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:34:00,012 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:34:00,015 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:34:00,018 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:34:00,021 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:34:00,070 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-28 07:34:00,072 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-11-28 07:34:00,077 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:34:00,082 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-11-28 07:34:00,083 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:34:00,088 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-11-28 07:34:00,088 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-28 07:34:00,093 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2020-11-28 07:34:00,094 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-28 07:34:00,098 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-11-28 07:34:00,098 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-28 07:34:00,103 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-11-28 07:34:00,103 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-11-28 07:34:00,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:34:00,120 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-11-28 07:34:00,121 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 4 variables, input treesize:134, output treesize:22 [2020-11-28 07:34:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:00,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1544040095] [2020-11-28 07:34:00,226 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-11-28 07:34:00,227 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:34:00,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:34:00,236 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:34:00,236 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:34:00,856 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:34:01,520 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 106 [2020-11-28 07:34:01,844 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-11-28 07:34:02,298 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-11-28 07:34:02,495 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-11-28 07:34:02,660 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-11-28 07:34:02,875 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-11-28 07:34:03,132 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-11-28 07:34:03,420 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2020-11-28 07:34:03,616 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-11-28 07:34:03,837 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-11-28 07:34:04,154 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-11-28 07:34:04,481 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-11-28 07:34:04,758 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-11-28 07:34:05,218 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 [2020-11-28 07:34:05,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:34:05,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:34:05,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2020-11-28 07:34:05,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962096826] [2020-11-28 07:34:05,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-28 07:34:05,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:05,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 07:34:05,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2020-11-28 07:34:05,222 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 18 states. [2020-11-28 07:34:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:06,065 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2020-11-28 07:34:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-28 07:34:06,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2020-11-28 07:34:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:06,068 INFO L225 Difference]: With dead ends: 135 [2020-11-28 07:34:06,068 INFO L226 Difference]: Without dead ends: 132 [2020-11-28 07:34:06,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2020-11-28 07:34:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-28 07:34:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 42. [2020-11-28 07:34:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 07:34:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-11-28 07:34:06,082 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 18 [2020-11-28 07:34:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:06,082 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-11-28 07:34:06,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-28 07:34:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-11-28 07:34:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 07:34:06,084 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:06,084 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:34:06,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:34:06,300 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 07:34:06,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:06,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1074751622, now seen corresponding path program 2 times [2020-11-28 07:34:06,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:06,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358561547] [2020-11-28 07:34:06,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:34:06,342 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:34:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:34:06,382 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:34:06,424 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:34:06,424 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:34:06,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-28 07:34:06,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:34:06 BoogieIcfgContainer [2020-11-28 07:34:06,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:34:06,463 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:34:06,464 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:34:06,464 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:34:06,464 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:33:55" (3/4) ... [2020-11-28 07:34:06,466 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:34:06,555 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3e03fd7e-67f2-41f2-845d-0891c5ea0ae9/bin/utaipan/witness.graphml [2020-11-28 07:34:06,558 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:34:06,559 INFO L168 Benchmark]: Toolchain (without parser) took 12232.40 ms. Allocated memory was 104.9 MB in the beginning and 232.8 MB in the end (delta: 127.9 MB). Free memory was 66.3 MB in the beginning and 166.5 MB in the end (delta: -100.2 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:06,560 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 104.9 MB. Free memory is still 82.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:34:06,560 INFO L168 Benchmark]: CACSL2BoogieTranslator took 424.78 ms. Allocated memory is still 104.9 MB. Free memory was 66.1 MB in the beginning and 78.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:06,563 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.08 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 76.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:06,563 INFO L168 Benchmark]: Boogie Preprocessor took 42.56 ms. Allocated memory is still 104.9 MB. Free memory was 76.7 MB in the beginning and 75.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:06,563 INFO L168 Benchmark]: RCFGBuilder took 971.88 ms. Allocated memory is still 104.9 MB. Free memory was 75.6 MB in the beginning and 39.9 MB in the end (delta: 35.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:06,564 INFO L168 Benchmark]: TraceAbstraction took 10614.22 ms. Allocated memory was 104.9 MB in the beginning and 232.8 MB in the end (delta: 127.9 MB). Free memory was 39.4 MB in the beginning and 169.6 MB in the end (delta: -130.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:34:06,564 INFO L168 Benchmark]: Witness Printer took 94.89 ms. Allocated memory is still 232.8 MB. Free memory was 168.6 MB in the beginning and 166.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:06,566 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 104.9 MB. Free memory is still 82.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 424.78 ms. Allocated memory is still 104.9 MB. Free memory was 66.1 MB in the beginning and 78.7 MB in the end (delta: -12.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.08 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 76.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.56 ms. Allocated memory is still 104.9 MB. Free memory was 76.7 MB in the beginning and 75.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 971.88 ms. Allocated memory is still 104.9 MB. Free memory was 75.6 MB in the beginning and 39.9 MB in the end (delta: 35.6 MB). Peak memory consumption was 35.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10614.22 ms. Allocated memory was 104.9 MB in the beginning and 232.8 MB in the end (delta: 127.9 MB). Free memory was 39.4 MB in the beginning and 169.6 MB in the end (delta: -130.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 94.89 ms. Allocated memory is still 232.8 MB. Free memory was 168.6 MB in the beginning and 166.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L85] char A [2 + 2 + 4 +1]; [L86] A[2 + 2 + 4] = 0 [L59] int start=0, i=-1, j=-1; [L60] char str2[2]; [L61] COND FALSE !(!str) [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L80] EXPR str[i] [L80] COND TRUE str[i] != 0 [L63] i++ [L64] str[i] [L65] case 0: [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] EXPR str[start] [L66] (str[start] == ' ') || (str[start] == '\t') [L66] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L67] EXPR str[start] [L67] COND FALSE !(str[start] == '"') [L68] j = i-1 [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] EXPR str[j] [L69] EXPR (str[j] == ' ') || (str[j] == '\t') [L69] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L69] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L70] (0 < j) && (str[j] == '"') [L70] EXPR str[j] [L70] (0 < j) && (str[j] == '"') [L70] COND FALSE !((0 < j) && (str[j] == '"')) [L71] COND TRUE start<=j [L41] return strncpy(dest,src,n); [L14] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "verisec_OpenSER_cases1_stripFullBoth_arr.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.4s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 80 SDtfs, 275 SDslu, 286 SDs, 0 SdLazy, 452 SolverSat, 155 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 135 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 15548 SizeOfPredicates, 30 NumberOfNonLiveVariables, 220 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 4/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...