./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 282a32bc5fb3d70423f87a450340f7a26ab0f093 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:23:11,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:23:11,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:23:11,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:23:11,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:23:11,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:23:11,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:23:11,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:23:11,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:23:11,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:23:11,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:23:11,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:23:11,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:23:11,948 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:23:11,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:23:11,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:23:11,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:23:11,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:23:11,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:23:11,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:23:11,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:23:11,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:23:11,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:23:11,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:23:11,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:23:11,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:23:11,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:23:11,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:23:11,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:23:11,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:23:11,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:23:11,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:23:11,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:23:11,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:23:11,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:23:11,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:23:11,967 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:23:11,967 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:23:11,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:23:11,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:23:11,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:23:11,969 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2020-12-09 08:23:11,986 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:23:11,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:23:11,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:23:11,987 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:23:11,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:23:11,987 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:23:11,987 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:23:11,987 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:23:11,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:23:11,987 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:23:11,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:23:11,988 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:23:11,988 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:23:11,988 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:23:11,988 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:23:11,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 08:23:11,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 08:23:11,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:23:11,989 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:23:11,990 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:23:11,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:23:11,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:23:11,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:23:11,990 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:23:11,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:23:11,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:23:11,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:23:11,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:23:11,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:23:11,991 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_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 282a32bc5fb3d70423f87a450340f7a26ab0f093 [2020-12-09 08:23:12,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:23:12,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:23:12,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:23:12,168 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:23:12,169 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:23:12,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/../../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c [2020-12-09 08:23:12,219 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/data/e82e31242/41c5281fd2ea4f3aa9b2b3767e2db594/FLAG7d7558cbc [2020-12-09 08:23:12,594 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:23:12,595 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c [2020-12-09 08:23:12,599 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/data/e82e31242/41c5281fd2ea4f3aa9b2b3767e2db594/FLAG7d7558cbc [2020-12-09 08:23:12,611 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/data/e82e31242/41c5281fd2ea4f3aa9b2b3767e2db594 [2020-12-09 08:23:12,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:23:12,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:23:12,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:23:12,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:23:12,619 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:23:12,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a6f267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12, skipping insertion in model container [2020-12-09 08:23:12,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:23:12,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:23:12,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:23:12,756 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:23:12,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:23:12,788 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:23:12,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12 WrapperNode [2020-12-09 08:23:12,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:23:12,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:23:12,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:23:12,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:23:12,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:23:12,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:23:12,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:23:12,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:23:12,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,824 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... [2020-12-09 08:23:12,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:23:12,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:23:12,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:23:12,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:23:12,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/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 08:23:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 08:23:12,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:23:12,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:23:12,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 08:23:12,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:23:12,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 08:23:13,072 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:23:13,072 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-09 08:23:13,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:23:13 BoogieIcfgContainer [2020-12-09 08:23:13,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:23:13,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:23:13,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:23:13,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:23:13,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:23:12" (1/3) ... [2020-12-09 08:23:13,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfd98d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:23:13, skipping insertion in model container [2020-12-09 08:23:13,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:23:12" (2/3) ... [2020-12-09 08:23:13,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfd98d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:23:13, skipping insertion in model container [2020-12-09 08:23:13,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:23:13" (3/3) ... [2020-12-09 08:23:13,080 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays03-ValueRestictsIndex-2.c [2020-12-09 08:23:13,090 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:23:13,092 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-09 08:23:13,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-09 08:23:13,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:23:13,115 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 08:23:13,115 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:23:13,115 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:23:13,116 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:23:13,116 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:23:13,116 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:23:13,116 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:23:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 08:23:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 08:23:13,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:13,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 08:23:13,130 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:13,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:13,134 INFO L82 PathProgramCache]: Analyzing trace with hash 90656, now seen corresponding path program 1 times [2020-12-09 08:23:13,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:13,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897929362] [2020-12-09 08:23:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:13,248 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 08:23:13,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897929362] [2020-12-09 08:23:13,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:23:13,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 08:23:13,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385963126] [2020-12-09 08:23:13,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:23:13,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:13,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:23:13,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:23:13,268 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-12-09 08:23:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:13,301 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2020-12-09 08:23:13,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:23:13,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 08:23:13,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:13,308 INFO L225 Difference]: With dead ends: 16 [2020-12-09 08:23:13,308 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 08:23:13,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:23:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 08:23:13,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 08:23:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 08:23:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-12-09 08:23:13,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 3 [2020-12-09 08:23:13,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:13,331 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-12-09 08:23:13,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:23:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-12-09 08:23:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 08:23:13,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:13,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 08:23:13,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 08:23:13,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash 90657, now seen corresponding path program 1 times [2020-12-09 08:23:13,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:13,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982905263] [2020-12-09 08:23:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:13,369 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 08:23:13,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982905263] [2020-12-09 08:23:13,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:23:13,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 08:23:13,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222081757] [2020-12-09 08:23:13,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:23:13,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:13,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:23:13,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:23:13,373 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2020-12-09 08:23:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:13,391 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2020-12-09 08:23:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:23:13,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 08:23:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:13,393 INFO L225 Difference]: With dead ends: 17 [2020-12-09 08:23:13,393 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 08:23:13,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:23:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 08:23:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 08:23:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 08:23:13,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-09 08:23:13,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 3 [2020-12-09 08:23:13,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:13,398 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-09 08:23:13,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:23:13,398 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-09 08:23:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 08:23:13,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:13,399 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 08:23:13,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 08:23:13,399 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash 87172633, now seen corresponding path program 1 times [2020-12-09 08:23:13,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:13,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474752892] [2020-12-09 08:23:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:13,456 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 08:23:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474752892] [2020-12-09 08:23:13,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75927880] [2020-12-09 08:23:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/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 08:23:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:13,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:23:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:23:13,531 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-12-09 08:23:13,532 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:23:13,538 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:23:13,539 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:23:13,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 08:23:13,556 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 08:23:13,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:23:13,589 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 08:23:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035372877] [2020-12-09 08:23:13,604 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 08:23:13,604 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:23:13,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:23:13,613 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:23:13,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:23:13,937 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:23:14,067 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:23:14,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:23:14,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 08:23:14,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462713123] [2020-12-09 08:23:14,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:23:14,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:23:14,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 08:23:14,069 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 6 states. [2020-12-09 08:23:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:14,138 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2020-12-09 08:23:14,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:23:14,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 08:23:14,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:14,139 INFO L225 Difference]: With dead ends: 41 [2020-12-09 08:23:14,139 INFO L226 Difference]: Without dead ends: 41 [2020-12-09 08:23:14,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:23:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-09 08:23:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2020-12-09 08:23:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 08:23:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-09 08:23:14,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 5 [2020-12-09 08:23:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:14,143 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-09 08:23:14,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:23:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-09 08:23:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:23:14,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:14,143 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 08:23:14,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 08:23:14,345 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1493658438, now seen corresponding path program 1 times [2020-12-09 08:23:14,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:14,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235945561] [2020-12-09 08:23:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 08:23:14,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235945561] [2020-12-09 08:23:14,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:23:14,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 08:23:14,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211061341] [2020-12-09 08:23:14,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 08:23:14,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:14,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 08:23:14,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:23:14,470 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 3 states. [2020-12-09 08:23:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:14,516 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2020-12-09 08:23:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 08:23:14,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 08:23:14,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:14,521 INFO L225 Difference]: With dead ends: 22 [2020-12-09 08:23:14,521 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 08:23:14,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 08:23:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 08:23:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 08:23:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 08:23:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-12-09 08:23:14,532 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 8 [2020-12-09 08:23:14,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:14,533 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-12-09 08:23:14,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 08:23:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-12-09 08:23:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:23:14,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:14,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 08:23:14,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-09 08:23:14,536 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 941262435, now seen corresponding path program 1 times [2020-12-09 08:23:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:14,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089458742] [2020-12-09 08:23:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:23:14,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089458742] [2020-12-09 08:23:14,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934707992] [2020-12-09 08:23:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/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 08:23:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:14,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:23:14,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:23:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:23:14,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:23:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:23:14,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570924195] [2020-12-09 08:23:14,653 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 08:23:14,653 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:23:14,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:23:14,654 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:23:14,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:23:14,818 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:23:15,016 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:23:15,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 08:23:15,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-12-09 08:23:15,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113283782] [2020-12-09 08:23:15,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 08:23:15,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:15,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 08:23:15,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-09 08:23:15,018 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 8 states. [2020-12-09 08:23:15,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:15,045 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-12-09 08:23:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 08:23:15,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-12-09 08:23:15,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:15,046 INFO L225 Difference]: With dead ends: 26 [2020-12-09 08:23:15,046 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 08:23:15,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-09 08:23:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 08:23:15,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-09 08:23:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-09 08:23:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-12-09 08:23:15,049 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2020-12-09 08:23:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:15,049 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-12-09 08:23:15,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 08:23:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-12-09 08:23:15,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:23:15,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:15,050 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 08:23:15,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:23:15,251 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:15,253 INFO L82 PathProgramCache]: Analyzing trace with hash 928759297, now seen corresponding path program 2 times [2020-12-09 08:23:15,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:15,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851796987] [2020-12-09 08:23:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:23:15,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851796987] [2020-12-09 08:23:15,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:23:15,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 08:23:15,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896627976] [2020-12-09 08:23:15,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 08:23:15,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:15,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 08:23:15,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 08:23:15,456 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2020-12-09 08:23:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:15,487 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-12-09 08:23:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 08:23:15,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 08:23:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:15,488 INFO L225 Difference]: With dead ends: 24 [2020-12-09 08:23:15,488 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 08:23:15,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-09 08:23:15,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 08:23:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 08:23:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 08:23:15,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 08:23:15,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2020-12-09 08:23:15,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:15,490 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 08:23:15,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 08:23:15,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 08:23:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 08:23:15,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:15,491 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2020-12-09 08:23:15,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-09 08:23:15,491 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:15,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:15,492 INFO L82 PathProgramCache]: Analyzing trace with hash 611875395, now seen corresponding path program 2 times [2020-12-09 08:23:15,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:15,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639638135] [2020-12-09 08:23:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:23:15,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639638135] [2020-12-09 08:23:15,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092342430] [2020-12-09 08:23:15,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/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 08:23:15,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 08:23:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:23:15,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 08:23:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:23:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 08:23:15,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:23:15,722 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 08:23:15,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 08:23:15,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-12-09 08:23:15,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419560718] [2020-12-09 08:23:15,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:23:15,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:15,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:23:15,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-09 08:23:15,724 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-12-09 08:23:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:15,785 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-12-09 08:23:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:23:15,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-09 08:23:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:15,786 INFO L225 Difference]: With dead ends: 23 [2020-12-09 08:23:15,786 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 08:23:15,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:23:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 08:23:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 08:23:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 08:23:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-09 08:23:15,789 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-09 08:23:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:15,789 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-09 08:23:15,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:23:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-09 08:23:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 08:23:15,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:23:15,790 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-09 08:23:15,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-09 08:23:15,992 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 08:23:15,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:23:15,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1787263848, now seen corresponding path program 1 times [2020-12-09 08:23:15,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:23:15,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10821966] [2020-12-09 08:23:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:23:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:23:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 08:23:16,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10821966] [2020-12-09 08:23:16,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:23:16,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:23:16,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985238535] [2020-12-09 08:23:16,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 08:23:16,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:23:16,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 08:23:16,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 08:23:16,155 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 4 states. [2020-12-09 08:23:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:23:16,165 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-09 08:23:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:23:16,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 08:23:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:23:16,166 INFO L225 Difference]: With dead ends: 18 [2020-12-09 08:23:16,166 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 08:23:16,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 08:23:16,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 08:23:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 08:23:16,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 08:23:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 08:23:16,167 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-12-09 08:23:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:23:16,167 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 08:23:16,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 08:23:16,168 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 08:23:16,168 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 08:23:16,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-12-09 08:23:16,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:23:16 BoogieIcfgContainer [2020-12-09 08:23:16,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:23:16,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:23:16,173 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:23:16,174 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:23:16,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:23:13" (3/4) ... [2020-12-09 08:23:16,177 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 08:23:16,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-12-09 08:23:16,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 08:23:16,186 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 08:23:16,216 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a1f9a56b-be8d-41eb-86a4-9b623b65fbf8/bin/utaipan/witness.graphml [2020-12-09 08:23:16,216 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:23:16,217 INFO L168 Benchmark]: Toolchain (without parser) took 3601.96 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 99.5 MB in the beginning and 90.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:23:16,217 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 71.3 MB. Free memory was 36.8 MB in the beginning and 36.8 MB in the end (delta: 54.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:23:16,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.25 ms. Allocated memory is still 130.0 MB. Free memory was 99.5 MB in the beginning and 107.2 MB in the end (delta: -7.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:23:16,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 130.0 MB. Free memory was 107.2 MB in the beginning and 105.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:23:16,219 INFO L168 Benchmark]: Boogie Preprocessor took 15.35 ms. Allocated memory is still 130.0 MB. Free memory was 105.8 MB in the beginning and 105.1 MB in the end (delta: 644.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:23:16,219 INFO L168 Benchmark]: RCFGBuilder took 244.98 ms. Allocated memory is still 130.0 MB. Free memory was 105.1 MB in the beginning and 86.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 08:23:16,219 INFO L168 Benchmark]: TraceAbstraction took 3097.67 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 86.2 MB in the beginning and 93.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:23:16,220 INFO L168 Benchmark]: Witness Printer took 42.56 ms. Allocated memory is still 157.3 MB. Free memory was 93.6 MB in the beginning and 90.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:23:16,222 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 71.3 MB. Free memory was 36.8 MB in the beginning and 36.8 MB in the end (delta: 54.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 172.25 ms. Allocated memory is still 130.0 MB. Free memory was 99.5 MB in the beginning and 107.2 MB in the end (delta: -7.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 130.0 MB. Free memory was 107.2 MB in the beginning and 105.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.35 ms. Allocated memory is still 130.0 MB. Free memory was 105.8 MB in the beginning and 105.1 MB in the end (delta: 644.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 244.98 ms. Allocated memory is still 130.0 MB. Free memory was 105.1 MB in the beginning and 86.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3097.67 ms. Allocated memory was 130.0 MB in the beginning and 157.3 MB in the end (delta: 27.3 MB). Free memory was 86.2 MB in the beginning and 93.6 MB in the end (delta: -7.4 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. * Witness Printer took 42.56 ms. Allocated memory is still 157.3 MB. Free memory was 93.6 MB in the beginning and 90.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 158 SDslu, 141 SDs, 0 SdLazy, 149 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=5, 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, 8 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 105 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 122 ConstructedInterpolants, 1 QuantifiedInterpolants, 13498 SizeOfPredicates, 0 NumberOfNonLiveVariables, 106 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 132/186 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...