./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/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 32bit --witnessprinter.graph.data.programhash b9551eac17e9ca0a42612f73eb01545dde991582 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:30:11,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:30:11,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:30:12,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:30:12,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:30:12,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:30:12,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:30:12,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:30:12,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:30:12,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:30:12,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:30:12,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:30:12,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:30:12,037 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:30:12,038 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:30:12,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:30:12,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:30:12,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:30:12,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:30:12,059 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:30:12,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:30:12,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:30:12,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:30:12,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:30:12,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:30:12,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:30:12,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:30:12,076 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:30:12,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:30:12,077 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:30:12,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:30:12,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:30:12,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:30:12,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:30:12,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:30:12,087 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:30:12,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:30:12,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:30:12,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:30:12,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:30:12,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:30:12,092 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:30:12,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:30:12,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:30:12,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:30:12,132 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:30:12,133 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:30:12,133 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:30:12,133 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:30:12,133 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:30:12,133 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:30:12,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:30:12,137 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:30:12,138 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:30:12,138 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:30:12,138 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:30:12,138 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:30:12,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:30:12,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:30:12,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:30:12,139 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:30:12,140 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:30:12,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:30:12,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:30:12,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:30:12,141 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:30:12,141 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:30:12,141 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:30:12,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:30:12,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:30:12,142 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:30:12,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:30:12,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:30:12,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:30:12,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:30:12,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:30:12,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:30:12,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:30:12,143 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:30:12,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:30:12,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:30:12,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:30:12,144 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_7617d28b-b669-4737-9790-0913823e51f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9551eac17e9ca0a42612f73eb01545dde991582 [2020-11-28 07:30:12,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:30:12,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:30:12,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:30:12,484 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:30:12,484 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:30:12,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/../../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2020-11-28 07:30:12,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/data/4c85ea63e/dc8a6103cb33470394e3036091446b54/FLAG3e8a0daf5 [2020-11-28 07:30:13,135 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:30:13,136 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2020-11-28 07:30:13,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/data/4c85ea63e/dc8a6103cb33470394e3036091446b54/FLAG3e8a0daf5 [2020-11-28 07:30:13,465 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/data/4c85ea63e/dc8a6103cb33470394e3036091446b54 [2020-11-28 07:30:13,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:30:13,468 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:30:13,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:13,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:30:13,481 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:30:13,482 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:13" (1/1) ... [2020-11-28 07:30:13,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48210dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:13, skipping insertion in model container [2020-11-28 07:30:13,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:30:13" (1/1) ... [2020-11-28 07:30:13,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:30:13,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:30:13,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:13,891 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:30:13,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:30:14,007 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:30:14,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14 WrapperNode [2020-11-28 07:30:14,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:30:14,010 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:14,011 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:30:14,011 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:30:14,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:30:14,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:30:14,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:30:14,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:30:14,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... [2020-11-28 07:30:14,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:30:14,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:30:14,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:30:14,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:30:14,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/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 07:30:14,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:30:14,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:30:14,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:30:14,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:30:14,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:30:14,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:30:14,953 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:30:14,953 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 07:30:14,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:14 BoogieIcfgContainer [2020-11-28 07:30:14,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:30:14,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:30:14,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:30:14,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:30:14,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:30:13" (1/3) ... [2020-11-28 07:30:14,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66843b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:14, skipping insertion in model container [2020-11-28 07:30:14,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:30:14" (2/3) ... [2020-11-28 07:30:14,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66843b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:30:14, skipping insertion in model container [2020-11-28 07:30:14,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:14" (3/3) ... [2020-11-28 07:30:14,964 INFO L111 eAbstractionObserver]: Analyzing ICFG mult_array-alloca-1.i [2020-11-28 07:30:14,975 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:30:14,979 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 07:30:14,992 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 07:30:15,012 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:30:15,012 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:30:15,013 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:30:15,013 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:30:15,013 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:30:15,013 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:30:15,013 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:30:15,014 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:30:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-28 07:30:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:30:15,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:15,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:30:15,033 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]=== [2020-11-28 07:30:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash 107322, now seen corresponding path program 1 times [2020-11-28 07:30:15,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:15,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671057527] [2020-11-28 07:30:15,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:15,122 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:15,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510295366] [2020-11-28 07:30:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/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 07:30:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:15,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:30:15,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:15,267 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 07:30:15,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:15,291 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 07:30:15,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671057527] [2020-11-28 07:30:15,291 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:15,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510295366] [2020-11-28 07:30:15,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:15,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-11-28 07:30:15,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317387227] [2020-11-28 07:30:15,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:30:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:15,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:30:15,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:30:15,319 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-28 07:30:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:15,376 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2020-11-28 07:30:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:30:15,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:30:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:15,387 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:30:15,387 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:30:15,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:30:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:30:15,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 07:30:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:30:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-28 07:30:15,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2020-11-28 07:30:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:15,420 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-28 07:30:15,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:30:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-28 07:30:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:30:15,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:15,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:30:15,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-28 07:30:15,630 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]=== [2020-11-28 07:30:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash 3327913, now seen corresponding path program 1 times [2020-11-28 07:30:15,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:15,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617359703] [2020-11-28 07:30:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:15,642 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:15,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371196208] [2020-11-28 07:30:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/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 07:30:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-28 07:30:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:15,795 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|ULTIMATE.start_main_old_#valid|]} [2020-11-28 07:30:15,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 07:30:15,815 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2020-11-28 07:30:15,818 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:15,841 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:30:15,854 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 [2020-11-28 07:30:15,857 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:15,875 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:30:15,881 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-11-28 07:30:15,881 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:24 [2020-11-28 07:30:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:16,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:16,148 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 07:30:16,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617359703] [2020-11-28 07:30:16,148 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:16,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371196208] [2020-11-28 07:30:16,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:16,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2020-11-28 07:30:16,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285560570] [2020-11-28 07:30:16,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:30:16,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:16,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:30:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:30:16,152 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-11-28 07:30:20,378 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2020-11-28 07:30:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:20,739 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-11-28 07:30:20,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:30:20,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 4 [2020-11-28 07:30:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:20,742 INFO L225 Difference]: With dead ends: 31 [2020-11-28 07:30:20,742 INFO L226 Difference]: Without dead ends: 31 [2020-11-28 07:30:20,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:30:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-28 07:30:20,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2020-11-28 07:30:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:30:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2020-11-28 07:30:20,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 29 transitions. Word has length 4 [2020-11-28 07:30:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:20,748 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-28 07:30:20,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:30:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 29 transitions. [2020-11-28 07:30:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:30:20,748 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:20,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:30:20,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:20,962 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]=== [2020-11-28 07:30:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:20,963 INFO L82 PathProgramCache]: Analyzing trace with hash 3327912, now seen corresponding path program 1 times [2020-11-28 07:30:20,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:20,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654224344] [2020-11-28 07:30:20,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:20,968 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:20,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039343453] [2020-11-28 07:30:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:21,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:21,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:30:21,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:21,076 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-28 07:30:21,077 INFO L384 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 07:30:21,077 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:21,091 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:30:21,092 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 07:30:21,092 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-28 07:30:21,102 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 07:30:21,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:21,103 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 07:30:21,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654224344] [2020-11-28 07:30:21,103 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:21,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039343453] [2020-11-28 07:30:21,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:21,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2020-11-28 07:30:21,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820936495] [2020-11-28 07:30:21,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:30:21,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:21,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:30:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:30:21,105 INFO L87 Difference]: Start difference. First operand 20 states and 29 transitions. Second operand 3 states. [2020-11-28 07:30:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:21,135 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2020-11-28 07:30:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:30:21,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-28 07:30:21,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:21,136 INFO L225 Difference]: With dead ends: 18 [2020-11-28 07:30:21,136 INFO L226 Difference]: Without dead ends: 18 [2020-11-28 07:30:21,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:30:21,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-28 07:30:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-28 07:30:21,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-28 07:30:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2020-11-28 07:30:21,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 4 [2020-11-28 07:30:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:21,140 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2020-11-28 07:30:21,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:30:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2020-11-28 07:30:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:30:21,141 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:21,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:30:21,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:21,342 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]=== [2020-11-28 07:30:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash 103212733, now seen corresponding path program 1 times [2020-11-28 07:30:21,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:21,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193355820] [2020-11-28 07:30:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:21,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:21,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050876478] [2020-11-28 07:30:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:21,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:30:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:21,441 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 07:30:21,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:21,468 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 07:30:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193355820] [2020-11-28 07:30:21,469 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:21,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050876478] [2020-11-28 07:30:21,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:21,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:30:21,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485230176] [2020-11-28 07:30:21,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:30:21,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:21,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:30:21,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:30:21,471 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 6 states. [2020-11-28 07:30:21,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:21,539 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2020-11-28 07:30:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:30:21,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-11-28 07:30:21,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:21,541 INFO L225 Difference]: With dead ends: 14 [2020-11-28 07:30:21,541 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:30:21,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:30:21,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:30:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-11-28 07:30:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 07:30:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-28 07:30:21,545 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2020-11-28 07:30:21,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:21,545 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-28 07:30:21,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:30:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-28 07:30:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:30:21,546 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:21,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:21,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:21,758 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]=== [2020-11-28 07:30:21,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:21,758 INFO L82 PathProgramCache]: Analyzing trace with hash 358727351, now seen corresponding path program 1 times [2020-11-28 07:30:21,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:21,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021599951] [2020-11-28 07:30:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:21,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:21,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130645406] [2020-11-28 07:30:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 07:30:21,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:21,845 INFO L384 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 [2020-11-28 07:30:21,845 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:21,857 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:30:21,857 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:30:21,858 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2020-11-28 07:30:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:30:21,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:30:21,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021599951] [2020-11-28 07:30:21,917 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:21,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130645406] [2020-11-28 07:30:21,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:21,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2020-11-28 07:30:21,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821846812] [2020-11-28 07:30:21,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:30:21,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:21,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:30:21,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:30:21,919 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2020-11-28 07:30:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:21,948 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-28 07:30:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:30:21,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-28 07:30:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:21,949 INFO L225 Difference]: With dead ends: 12 [2020-11-28 07:30:21,949 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:30:21,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:30:21,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:30:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 07:30:21,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 07:30:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 07:30:21,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2020-11-28 07:30:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:21,952 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 07:30:21,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:30:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-28 07:30:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 07:30:21,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:21,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:22,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:22,162 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]=== [2020-11-28 07:30:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash 358726564, now seen corresponding path program 1 times [2020-11-28 07:30:22,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:22,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057058487] [2020-11-28 07:30:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:22,167 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:22,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490207396] [2020-11-28 07:30:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:22,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:22,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 07:30:22,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:22,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:22,891 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-11-28 07:30:23,058 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-11-28 07:30:23,064 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:30:23,066 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-11-28 07:30:23,117 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2020-11-28 07:30:23,119 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:23,128 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2020-11-28 07:30:23,130 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:23,150 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 43 treesize of output 37 [2020-11-28 07:30:23,152 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:23,172 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2020-11-28 07:30:23,174 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:23,203 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 26 treesize of output 22 [2020-11-28 07:30:23,204 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:23,238 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 9 [2020-11-28 07:30:23,239 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:23,246 WARN L234 Elim1Store]: Array PQE input equivalent to true [2020-11-28 07:30:23,246 INFO L545 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:23,335 INFO L625 ElimStorePlain]: treesize reduction 128, result has 21.5 percent of original size [2020-11-28 07:30:23,336 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-28 07:30:23,336 INFO L244 ElimStorePlain]: Needed 8 recursive calls to eliminate 2 variables, input treesize:272, output treesize:35 [2020-11-28 07:30:23,411 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:30:36,369 WARN L193 SmtUtils]: Spent 4.51 s on a formula simplification that was a NOOP. DAG size: 20 [2020-11-28 07:30:36,375 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:30:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:30:36,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057058487] [2020-11-28 07:30:36,423 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:36,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490207396] [2020-11-28 07:30:36,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:30:36,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2020-11-28 07:30:36,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62951918] [2020-11-28 07:30:36,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:30:36,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:30:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=66, Unknown=4, NotChecked=0, Total=110 [2020-11-28 07:30:36,425 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2020-11-28 07:30:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:36,521 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-28 07:30:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:30:36,522 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-11-28 07:30:36,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:36,523 INFO L225 Difference]: With dead ends: 11 [2020-11-28 07:30:36,523 INFO L226 Difference]: Without dead ends: 11 [2020-11-28 07:30:36,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=49, Invalid=79, Unknown=4, NotChecked=0, Total=132 [2020-11-28 07:30:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-28 07:30:36,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-11-28 07:30:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 07:30:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-28 07:30:36,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2020-11-28 07:30:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:36,525 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 07:30:36,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:30:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-11-28 07:30:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:30:36,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:36,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:36,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:36,726 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]=== [2020-11-28 07:30:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:36,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1764378414, now seen corresponding path program 1 times [2020-11-28 07:30:36,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:36,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066061738] [2020-11-28 07:30:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:36,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:36,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622211729] [2020-11-28 07:30:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:36,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:30:36,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:36,809 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-28 07:30:36,809 INFO L384 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 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-28 07:30:36,810 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:36,818 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:30:36,819 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 07:30:36,819 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-28 07:30:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:30:36,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:30:36,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066061738] [2020-11-28 07:30:36,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:36,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622211729] [2020-11-28 07:30:36,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:36,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2020-11-28 07:30:36,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866502670] [2020-11-28 07:30:36,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:30:36,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:36,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:30:36,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:30:36,835 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-11-28 07:30:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:36,879 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-28 07:30:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:30:36,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-28 07:30:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:36,881 INFO L225 Difference]: With dead ends: 9 [2020-11-28 07:30:36,882 INFO L226 Difference]: Without dead ends: 9 [2020-11-28 07:30:36,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:30:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-28 07:30:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-28 07:30:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 07:30:36,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-28 07:30:36,883 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 8 [2020-11-28 07:30:36,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:36,884 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-28 07:30:36,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:30:36,884 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-28 07:30:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:30:36,884 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:30:36,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:30:37,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:37,085 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]=== [2020-11-28 07:30:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:30:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1764378413, now seen corresponding path program 1 times [2020-11-28 07:30:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:30:37,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55364120] [2020-11-28 07:30:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:30:37,090 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-28 07:30:37,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917234859] [2020-11-28 07:30:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:30:37,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:30:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 07:30:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:30:37,156 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:30:37,157 INFO L384 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 1 case distinctions, treesize of input 15 treesize of output 35 [2020-11-28 07:30:37,157 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:30:37,195 INFO L625 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2020-11-28 07:30:37,196 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:30:37,196 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:13 [2020-11-28 07:30:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:30:37,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:30:37,424 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-28 07:30:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:30:37,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55364120] [2020-11-28 07:30:37,584 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:30:37,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917234859] [2020-11-28 07:30:37,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:30:37,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2020-11-28 07:30:37,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171712347] [2020-11-28 07:30:37,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:30:37,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:30:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:30:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:30:37,585 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 8 states. [2020-11-28 07:30:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:30:37,818 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-11-28 07:30:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:30:37,819 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-28 07:30:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:30:37,820 INFO L225 Difference]: With dead ends: 8 [2020-11-28 07:30:37,820 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:30:37,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:30:37,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:30:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:30:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:30:37,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:30:37,821 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2020-11-28 07:30:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:30:37,821 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:30:37,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:30:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:30:37,821 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:30:38,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-28 07:30:38,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:30:38 BoogieIcfgContainer [2020-11-28 07:30:38,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:30:38,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:30:38,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:30:38,025 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:30:38,025 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:30:14" (3/4) ... [2020-11-28 07:30:38,028 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:30:38,037 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-11-28 07:30:38,037 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 07:30:38,037 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:30:38,092 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7617d28b-b669-4737-9790-0913823e51f4/bin/utaipan/witness.graphml [2020-11-28 07:30:38,092 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:30:38,093 INFO L168 Benchmark]: Toolchain (without parser) took 24623.95 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 59.6 MB in the beginning and 92.3 MB in the end (delta: -32.7 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:38,093 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory was 67.1 MB in the beginning and 67.1 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:38,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 538.98 ms. Allocated memory is still 94.4 MB. Free memory was 59.3 MB in the beginning and 61.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:38,094 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.95 ms. Allocated memory is still 94.4 MB. Free memory was 61.6 MB in the beginning and 59.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:38,094 INFO L168 Benchmark]: Boogie Preprocessor took 45.08 ms. Allocated memory is still 94.4 MB. Free memory was 59.9 MB in the beginning and 58.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:30:38,094 INFO L168 Benchmark]: RCFGBuilder took 826.99 ms. Allocated memory is still 94.4 MB. Free memory was 58.4 MB in the beginning and 67.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:38,095 INFO L168 Benchmark]: TraceAbstraction took 23067.50 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 66.8 MB in the beginning and 95.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:38,095 INFO L168 Benchmark]: Witness Printer took 66.89 ms. Allocated memory is still 130.0 MB. Free memory was 94.4 MB in the beginning and 92.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:30:38,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 94.4 MB. Free memory was 67.1 MB in the beginning and 67.1 MB in the end (delta: 27.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 538.98 ms. Allocated memory is still 94.4 MB. Free memory was 59.3 MB in the beginning and 61.6 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 71.95 ms. Allocated memory is still 94.4 MB. Free memory was 61.6 MB in the beginning and 59.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.08 ms. Allocated memory is still 94.4 MB. Free memory was 59.9 MB in the beginning and 58.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 826.99 ms. Allocated memory is still 94.4 MB. Free memory was 58.4 MB in the beginning and 67.3 MB in the end (delta: -8.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23067.50 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 66.8 MB in the beginning and 95.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. * Witness Printer took 66.89 ms. Allocated memory is still 130.0 MB. Free memory was 94.4 MB in the beginning and 92.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 512]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: 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, 16 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.0s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 161 SDslu, 19 SDs, 0 SdLazy, 141 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 18.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 13 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 76 ConstructedInterpolants, 7 QuantifiedInterpolants, 7634 SizeOfPredicates, 37 NumberOfNonLiveVariables, 412 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 16 InterpolantComputations, 15 PerfectInterpolantSequences, 7/8 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...