./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/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 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 17:49:20,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 17:49:20,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 17:49:20,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 17:49:20,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 17:49:20,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 17:49:20,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 17:49:20,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 17:49:20,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 17:49:20,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 17:49:20,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 17:49:20,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 17:49:20,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 17:49:20,166 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 17:49:20,167 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 17:49:20,168 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 17:49:20,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 17:49:20,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 17:49:20,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 17:49:20,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 17:49:20,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 17:49:20,175 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 17:49:20,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 17:49:20,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 17:49:20,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 17:49:20,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 17:49:20,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 17:49:20,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 17:49:20,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 17:49:20,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 17:49:20,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 17:49:20,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 17:49:20,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 17:49:20,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 17:49:20,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 17:49:20,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 17:49:20,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 17:49:20,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 17:49:20,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 17:49:20,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 17:49:20,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 17:49:20,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 17:49:20,206 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 17:49:20,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 17:49:20,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 17:49:20,206 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 17:49:20,207 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 17:49:20,207 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 17:49:20,207 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 17:49:20,207 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 17:49:20,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 17:49:20,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 17:49:20,207 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 17:49:20,207 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 17:49:20,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 17:49:20,208 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 17:49:20,208 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 17:49:20,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 17:49:20,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 17:49:20,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 17:49:20,209 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 17:49:20,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 17:49:20,210 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 17:49:20,210 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 17:49:20,210 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 17:49:20,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 17:49:20,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 17:49:20,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 17:49:20,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 17:49:20,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 17:49:20,211 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 17:49:20,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 17:49:20,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 17:49:20,211 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 17:49:20,211 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_7d715f88-3cbf-43bb-be0d-14624cb55fca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60fa12f4a8e344f82de5faf31b8f2cbfbaaacd93 [2020-12-09 17:49:20,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 17:49:20,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 17:49:20,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 17:49:20,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 17:49:20,397 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 17:49:20,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2020-12-09 17:49:20,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/data/1cc5ffb9a/56d0c4df2af44f46b5a6da0d73fa594b/FLAG03843e413 [2020-12-09 17:49:20,793 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 17:49:20,794 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/sv-benchmarks/c/memsafety-ext3/getNumbers1-2.c [2020-12-09 17:49:20,798 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/data/1cc5ffb9a/56d0c4df2af44f46b5a6da0d73fa594b/FLAG03843e413 [2020-12-09 17:49:20,807 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/data/1cc5ffb9a/56d0c4df2af44f46b5a6da0d73fa594b [2020-12-09 17:49:20,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 17:49:20,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 17:49:20,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 17:49:20,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 17:49:20,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 17:49:20,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff49e91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20, skipping insertion in model container [2020-12-09 17:49:20,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 17:49:20,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 17:49:20,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:49:20,944 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 17:49:20,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 17:49:20,964 INFO L208 MainTranslator]: Completed translation [2020-12-09 17:49:20,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20 WrapperNode [2020-12-09 17:49:20,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 17:49:20,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 17:49:20,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 17:49:20,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 17:49:20,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 17:49:20,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 17:49:20,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 17:49:20,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 17:49:20,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:20,998 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:21,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:21,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... [2020-12-09 17:49:21,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 17:49:21,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 17:49:21,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 17:49:21,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 17:49:21,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/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 17:49:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 17:49:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 17:49:21,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 17:49:21,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 17:49:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 17:49:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 17:49:21,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 17:49:21,284 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 17:49:21,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:49:21 BoogieIcfgContainer [2020-12-09 17:49:21,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 17:49:21,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 17:49:21,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 17:49:21,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 17:49:21,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 05:49:20" (1/3) ... [2020-12-09 17:49:21,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605a4568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:49:21, skipping insertion in model container [2020-12-09 17:49:21,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 05:49:20" (2/3) ... [2020-12-09 17:49:21,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@605a4568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 05:49:21, skipping insertion in model container [2020-12-09 17:49:21,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:49:21" (3/3) ... [2020-12-09 17:49:21,295 INFO L111 eAbstractionObserver]: Analyzing ICFG getNumbers1-2.c [2020-12-09 17:49:21,308 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 17:49:21,311 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 17:49:21,323 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 17:49:21,340 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 17:49:21,341 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 17:49:21,341 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 17:49:21,341 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 17:49:21,341 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 17:49:21,341 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 17:49:21,341 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 17:49:21,341 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 17:49:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-09 17:49:21,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:49:21,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:21,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:49:21,357 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 72397, now seen corresponding path program 1 times [2020-12-09 17:49:21,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:21,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170837953] [2020-12-09 17:49:21,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:21,486 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 17:49:21,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170837953] [2020-12-09 17:49:21,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:49:21,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:49:21,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529844328] [2020-12-09 17:49:21,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:49:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:21,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:49:21,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:49:21,502 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-09 17:49:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:21,525 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-12-09 17:49:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:49:21,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:49:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:21,534 INFO L225 Difference]: With dead ends: 11 [2020-12-09 17:49:21,535 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 17:49:21,536 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 17:49:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 17:49:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 17:49:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 17:49:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-12-09 17:49:21,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2020-12-09 17:49:21,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:21,564 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-12-09 17:49:21,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:49:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2020-12-09 17:49:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 17:49:21,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:21,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 17:49:21,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 17:49:21,565 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:21,566 INFO L82 PathProgramCache]: Analyzing trace with hash 72398, now seen corresponding path program 1 times [2020-12-09 17:49:21,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:21,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196390373] [2020-12-09 17:49:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:21,612 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 17:49:21,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196390373] [2020-12-09 17:49:21,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:49:21,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 17:49:21,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912788870] [2020-12-09 17:49:21,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:49:21,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:49:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:49:21,615 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2020-12-09 17:49:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:21,629 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 17:49:21,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:49:21,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 17:49:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:21,630 INFO L225 Difference]: With dead ends: 12 [2020-12-09 17:49:21,630 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 17:49:21,630 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 17:49:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 17:49:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 17:49:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 17:49:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-12-09 17:49:21,632 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 3 [2020-12-09 17:49:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:21,637 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-12-09 17:49:21,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:49:21,638 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-12-09 17:49:21,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 17:49:21,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:21,638 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 17:49:21,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 17:49:21,639 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:21,640 INFO L82 PathProgramCache]: Analyzing trace with hash 69607475, now seen corresponding path program 1 times [2020-12-09 17:49:21,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:21,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162615442] [2020-12-09 17:49:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:21,698 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 17:49:21,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162615442] [2020-12-09 17:49:21,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406208801] [2020-12-09 17:49:21,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/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 17:49:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:21,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 17:49:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:21,775 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 17:49:21,776 INFO L382 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-09 17:49:21,779 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 17:49:21,798 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-09 17:49:21,804 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 17:49:21,805 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:12 [2020-12-09 17:49:21,819 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 17:49:21,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:21,848 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 17:49:21,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1555246248] [2020-12-09 17:49:21,866 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 17:49:21,866 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:49:21,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:49:21,873 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:49:21,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:49:22,272 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:49:22,556 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-09 17:49:22,594 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:49:22,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:49:22,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-12-09 17:49:22,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61147374] [2020-12-09 17:49:22,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:49:22,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:22,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:49:22,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-09 17:49:22,596 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-12-09 17:49:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:22,659 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-09 17:49:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:49:22,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-12-09 17:49:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:22,660 INFO L225 Difference]: With dead ends: 30 [2020-12-09 17:49:22,660 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 17:49:22,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-09 17:49:22,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 17:49:22,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2020-12-09 17:49:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 17:49:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-09 17:49:22,663 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2020-12-09 17:49:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:22,663 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-09 17:49:22,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:49:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-09 17:49:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:49:22,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:22,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 17:49:22,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-09 17:49:22,866 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:22,867 INFO L82 PathProgramCache]: Analyzing trace with hash -791850794, now seen corresponding path program 1 times [2020-12-09 17:49:22,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:22,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203452738] [2020-12-09 17:49:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:22,948 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 17:49:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203452738] [2020-12-09 17:49:22,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:49:22,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 17:49:22,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784747303] [2020-12-09 17:49:22,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:49:22,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:22,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:49:22,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:49:22,954 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2020-12-09 17:49:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:23,009 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-09 17:49:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:49:23,009 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-09 17:49:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:23,010 INFO L225 Difference]: With dead ends: 22 [2020-12-09 17:49:23,010 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 17:49:23,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 17:49:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 17:49:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-09 17:49:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 17:49:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 17:49:23,015 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2020-12-09 17:49:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:23,015 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 17:49:23,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:49:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 17:49:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 17:49:23,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:23,016 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-12-09 17:49:23,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-09 17:49:23,017 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:23,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:23,017 INFO L82 PathProgramCache]: Analyzing trace with hash -791851485, now seen corresponding path program 1 times [2020-12-09 17:49:23,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:23,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059742089] [2020-12-09 17:49:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:23,057 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 17:49:23,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059742089] [2020-12-09 17:49:23,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980812427] [2020-12-09 17:49:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/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 17:49:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:23,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:49:23,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:23,112 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 17:49:23,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:23,141 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 17:49:23,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716464673] [2020-12-09 17:49:23,144 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 17:49:23,144 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:49:23,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:49:23,144 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:49:23,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:49:23,397 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:49:23,654 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-09 17:49:23,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:49:23,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4] total 11 [2020-12-09 17:49:23,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403615247] [2020-12-09 17:49:23,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:49:23,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:23,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:49:23,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-09 17:49:23,841 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2020-12-09 17:49:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:23,880 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-12-09 17:49:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 17:49:23,880 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 17:49:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:23,881 INFO L225 Difference]: With dead ends: 20 [2020-12-09 17:49:23,881 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 17:49:23,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-09 17:49:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 17:49:23,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 17:49:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:49:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-09 17:49:23,883 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2020-12-09 17:49:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:23,883 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-09 17:49:23,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:49:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-09 17:49:23,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:49:23,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:23,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 17:49:24,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-09 17:49:24,086 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:24,087 INFO L82 PathProgramCache]: Analyzing trace with hash -760047734, now seen corresponding path program 1 times [2020-12-09 17:49:24,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:24,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209919639] [2020-12-09 17:49:24,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 17:49:24,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209919639] [2020-12-09 17:49:24,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064164788] [2020-12-09 17:49:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/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 17:49:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 17:49:24,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 17:49:24,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 17:49:24,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 17:49:24,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [4] total 5 [2020-12-09 17:49:24,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212152882] [2020-12-09 17:49:24,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:49:24,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:24,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:49:24,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:49:24,278 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-12-09 17:49:24,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:24,282 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-09 17:49:24,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:49:24,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-09 17:49:24,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:24,283 INFO L225 Difference]: With dead ends: 19 [2020-12-09 17:49:24,283 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 17:49:24,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 17:49:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 17:49:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 17:49:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 17:49:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-09 17:49:24,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2020-12-09 17:49:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:24,286 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-09 17:49:24,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:49:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-09 17:49:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 17:49:24,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:24,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-09 17:49:24,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-09 17:49:24,487 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -760048425, now seen corresponding path program 1 times [2020-12-09 17:49:24,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:24,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937627243] [2020-12-09 17:49:24,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:49:24,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937627243] [2020-12-09 17:49:24,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699374133] [2020-12-09 17:49:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:24,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 17:49:24,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:49:24,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:49:24,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [230923507] [2020-12-09 17:49:24,698 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 17:49:24,698 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:49:24,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:49:24,698 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:49:24,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:49:24,965 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:49:25,271 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-09 17:49:25,447 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-09 17:49:25,470 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:49:25,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:49:25,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-12-09 17:49:25,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550501880] [2020-12-09 17:49:25,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 17:49:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:25,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 17:49:25,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:49:25,472 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 9 states. [2020-12-09 17:49:25,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:25,494 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-09 17:49:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 17:49:25,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-09 17:49:25,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:25,495 INFO L225 Difference]: With dead ends: 22 [2020-12-09 17:49:25,495 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 17:49:25,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-09 17:49:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 17:49:25,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-09 17:49:25,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 17:49:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-09 17:49:25,497 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2020-12-09 17:49:25,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:25,497 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-09 17:49:25,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 17:49:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-09 17:49:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 17:49:25,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:25,497 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-12-09 17:49:25,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:25,699 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash 992727266, now seen corresponding path program 2 times [2020-12-09 17:49:25,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:25,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754188479] [2020-12-09 17:49:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 17:49:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754188479] [2020-12-09 17:49:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443820723] [2020-12-09 17:49:25,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:25,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 17:49:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:49:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 17:49:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 17:49:25,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-09 17:49:25,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 17:49:25,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2020-12-09 17:49:25,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251829221] [2020-12-09 17:49:25,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 17:49:25,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 17:49:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 17:49:25,964 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-12-09 17:49:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:25,979 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2020-12-09 17:49:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 17:49:25,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 17:49:25,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:25,979 INFO L225 Difference]: With dead ends: 20 [2020-12-09 17:49:25,979 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 17:49:25,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-09 17:49:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 17:49:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 17:49:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 17:49:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 17:49:25,981 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2020-12-09 17:49:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:25,981 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 17:49:25,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 17:49:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 17:49:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 17:49:25,982 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:25,982 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1] [2020-12-09 17:49:26,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:26,183 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash -943284157, now seen corresponding path program 2 times [2020-12-09 17:49:26,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:26,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549108626] [2020-12-09 17:49:26,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 17:49:26,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549108626] [2020-12-09 17:49:26,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014803692] [2020-12-09 17:49:26,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:26,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 17:49:26,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:49:26,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 17:49:26,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-09 17:49:26,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-09 17:49:26,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [281301115] [2020-12-09 17:49:26,445 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 17:49:26,445 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:49:26,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:49:26,445 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:49:26,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:49:26,655 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:49:26,965 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-09 17:49:27,156 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-09 17:49:27,195 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:49:27,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:49:27,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2020-12-09 17:49:27,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58094861] [2020-12-09 17:49:27,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 17:49:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:27,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 17:49:27,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-12-09 17:49:27,196 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 17 states. [2020-12-09 17:49:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:27,431 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-12-09 17:49:27,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 17:49:27,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2020-12-09 17:49:27,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:27,432 INFO L225 Difference]: With dead ends: 32 [2020-12-09 17:49:27,432 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 17:49:27,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2020-12-09 17:49:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 17:49:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-12-09 17:49:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 17:49:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-09 17:49:27,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2020-12-09 17:49:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:27,436 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-09 17:49:27,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 17:49:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-09 17:49:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 17:49:27,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:27,436 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1] [2020-12-09 17:49:27,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:27,638 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash 753108029, now seen corresponding path program 1 times [2020-12-09 17:49:27,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:27,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138440233] [2020-12-09 17:49:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-09 17:49:27,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138440233] [2020-12-09 17:49:27,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 17:49:27,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 17:49:27,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609328042] [2020-12-09 17:49:27,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 17:49:27,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:27,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 17:49:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:49:27,692 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2020-12-09 17:49:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:27,701 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-09 17:49:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 17:49:27,701 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-09 17:49:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:27,702 INFO L225 Difference]: With dead ends: 27 [2020-12-09 17:49:27,702 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 17:49:27,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 17:49:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 17:49:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 17:49:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 17:49:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-09 17:49:27,704 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 20 [2020-12-09 17:49:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:27,704 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-09 17:49:27,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 17:49:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-09 17:49:27,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 17:49:27,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:27,705 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 1, 1, 1] [2020-12-09 17:49:27,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2020-12-09 17:49:27,705 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash -193347302, now seen corresponding path program 3 times [2020-12-09 17:49:27,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:27,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699252039] [2020-12-09 17:49:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-09 17:49:27,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699252039] [2020-12-09 17:49:27,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378869515] [2020-12-09 17:49:27,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/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 [2020-12-09 17:49:27,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 17:49:27,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:49:27,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 17:49:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:27,983 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 17:49:27,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 17:49:28,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [847510244] [2020-12-09 17:49:28,271 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 17:49:28,271 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:49:28,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:49:28,272 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:49:28,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:49:28,465 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:49:28,825 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-09 17:49:29,035 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-09 17:49:29,193 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:49:29,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:49:29,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 33 [2020-12-09 17:49:29,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590659775] [2020-12-09 17:49:29,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-09 17:49:29,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:29,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-09 17:49:29,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2020-12-09 17:49:29,194 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 33 states. [2020-12-09 17:49:29,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:29,911 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-09 17:49:29,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 17:49:29,912 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 26 [2020-12-09 17:49:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:29,912 INFO L225 Difference]: With dead ends: 42 [2020-12-09 17:49:29,912 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 17:49:29,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=602, Invalid=2478, Unknown=0, NotChecked=0, Total=3080 [2020-12-09 17:49:29,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 17:49:29,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-09 17:49:29,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-09 17:49:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-12-09 17:49:29,916 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2020-12-09 17:49:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:29,916 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-12-09 17:49:29,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-09 17:49:29,916 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-12-09 17:49:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-09 17:49:29,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:29,917 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 8, 8, 1, 1, 1] [2020-12-09 17:49:30,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-12-09 17:49:30,118 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:30,119 INFO L82 PathProgramCache]: Analyzing trace with hash 516543565, now seen corresponding path program 4 times [2020-12-09 17:49:30,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:30,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354880783] [2020-12-09 17:49:30,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-09 17:49:30,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354880783] [2020-12-09 17:49:30,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383479358] [2020-12-09 17:49:30,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 17:49:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-09 17:49:30,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-12-09 17:49:30,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910520640] [2020-12-09 17:49:30,342 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-12-09 17:49:30,342 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 17:49:30,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 17:49:30,342 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 17:49:30,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 17:49:30,552 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 17:49:30,860 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-12-09 17:49:31,038 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-12-09 17:49:31,191 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 17:49:31,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 17:49:31,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2020-12-09 17:49:31,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223067597] [2020-12-09 17:49:31,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 17:49:31,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:31,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 17:49:31,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:49:31,193 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 13 states. [2020-12-09 17:49:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:31,218 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-12-09 17:49:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 17:49:31,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-12-09 17:49:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:31,219 INFO L225 Difference]: With dead ends: 45 [2020-12-09 17:49:31,219 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 17:49:31,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-12-09 17:49:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 17:49:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-09 17:49:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 17:49:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-09 17:49:31,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 40 [2020-12-09 17:49:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:31,222 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-09 17:49:31,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 17:49:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-09 17:49:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-09 17:49:31,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 17:49:31,223 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2020-12-09 17:49:31,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-12-09 17:49:31,424 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 17:49:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 17:49:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2127880957, now seen corresponding path program 5 times [2020-12-09 17:49:31,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 17:49:31,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887363877] [2020-12-09 17:49:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 17:49:31,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 17:49:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 91 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-09 17:49:31,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887363877] [2020-12-09 17:49:31,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926811611] [2020-12-09 17:49:31,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:31,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 17:49:31,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 17:49:31,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 17:49:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 17:49:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-09 17:49:31,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 17:49:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-09 17:49:31,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 17:49:31,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13, 5] total 22 [2020-12-09 17:49:31,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044108891] [2020-12-09 17:49:31,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 17:49:31,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 17:49:31,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 17:49:31,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2020-12-09 17:49:31,838 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 6 states. [2020-12-09 17:49:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 17:49:31,883 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-12-09 17:49:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 17:49:31,883 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-12-09 17:49:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 17:49:31,883 INFO L225 Difference]: With dead ends: 44 [2020-12-09 17:49:31,883 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 17:49:31,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-12-09 17:49:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 17:49:31,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 17:49:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 17:49:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 17:49:31,884 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-12-09 17:49:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 17:49:31,884 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 17:49:31,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 17:49:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 17:49:31,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 17:49:32,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 17:49:32,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 05:49:32 BoogieIcfgContainer [2020-12-09 17:49:32,097 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 17:49:32,099 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 17:49:32,099 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 17:49:32,099 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 17:49:32,100 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 05:49:21" (3/4) ... [2020-12-09 17:49:32,107 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 17:49:32,125 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 17:49:32,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 17:49:32,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 17:49:32,126 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 17:49:32,149 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_7d715f88-3cbf-43bb-be0d-14624cb55fca/bin/utaipan/witness.graphml [2020-12-09 17:49:32,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 17:49:32,150 INFO L168 Benchmark]: Toolchain (without parser) took 11339.88 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 86.9 MB in the beginning and 52.6 MB in the end (delta: 34.2 MB). Peak memory consumption was 85.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:49:32,150 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 111.1 MB. Free memory was 76.1 MB in the beginning and 76.0 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:49:32,151 INFO L168 Benchmark]: CACSL2BoogieTranslator took 153.39 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 88.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 17:49:32,151 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.23 ms. Allocated memory is still 111.1 MB. Free memory was 88.0 MB in the beginning and 86.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:49:32,151 INFO L168 Benchmark]: Boogie Preprocessor took 15.72 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 85.5 MB in the end (delta: 935.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 17:49:32,151 INFO L168 Benchmark]: RCFGBuilder took 283.03 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 67.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-09 17:49:32,151 INFO L168 Benchmark]: TraceAbstraction took 10809.30 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 67.1 MB in the beginning and 55.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 64.8 MB. Max. memory is 16.1 GB. [2020-12-09 17:49:32,151 INFO L168 Benchmark]: Witness Printer took 51.04 ms. Allocated memory is still 161.5 MB. Free memory was 55.5 MB in the beginning and 52.6 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 17:49:32,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 111.1 MB. Free memory was 76.1 MB in the beginning and 76.0 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 153.39 ms. Allocated memory is still 111.1 MB. Free memory was 86.9 MB in the beginning and 88.0 MB in the end (delta: -1.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.23 ms. Allocated memory is still 111.1 MB. Free memory was 88.0 MB in the beginning and 86.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.72 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 85.5 MB in the end (delta: 935.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 283.03 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 67.3 MB in the end (delta: 17.9 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10809.30 ms. Allocated memory was 111.1 MB in the beginning and 161.5 MB in the end (delta: 50.3 MB). Free memory was 67.1 MB in the beginning and 55.5 MB in the end (delta: 11.5 MB). Peak memory consumption was 64.8 MB. Max. memory is 16.1 GB. * Witness Printer took 51.04 ms. Allocated memory is still 161.5 MB. Free memory was 55.5 MB in the beginning and 52.6 MB in the end (delta: 2.9 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: 9]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 9]: 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: 15]: 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 - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.7s, OverallIterations: 13, TraceHistogramMax: 11, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 227 SDslu, 67 SDs, 0 SdLazy, 576 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 347 SyntacticMatches, 25 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=12, 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, 13 MinimizatonAttempts, 21 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 378 NumberOfCodeBlocks, 325 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 519 ConstructedInterpolants, 0 QuantifiedInterpolants, 93284 SizeOfPredicates, 32 NumberOfNonLiveVariables, 689 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 31 InterpolantComputations, 8 PerfectInterpolantSequences, 1202/1639 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: OVERALL_TIME[ms]: 254, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 156, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 12, TOOLS_QUANTIFIERELIM_TIME[ms]: 153, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 61, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 30, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 45, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 8, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 147, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 147, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 2, DAG_COMPRESSION_PROCESSED_NODES: 52, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...