./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/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 56b28f59847d63942ec468b0c95f39e5b8c0763a .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:43:45,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:43:45,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:43:45,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:43:45,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:43:45,114 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:43:45,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:43:45,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:43:45,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:43:45,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:43:45,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:43:45,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:43:45,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:43:45,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:43:45,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:43:45,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:43:45,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:43:45,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:43:45,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:43:45,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:43:45,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:43:45,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:43:45,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:43:45,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:43:45,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:43:45,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:43:45,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:43:45,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:43:45,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:43:45,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:43:45,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:43:45,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:43:45,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:43:45,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:43:45,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:43:45,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:43:45,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:43:45,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:43:45,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:43:45,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:43:45,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:43:45,177 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:43:45,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:43:45,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:43:45,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:43:45,205 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:43:45,206 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:43:45,206 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:43:45,206 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:43:45,207 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:43:45,207 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:43:45,207 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:43:45,208 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:43:45,208 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:43:45,208 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:43:45,209 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:43:45,209 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:43:45,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:43:45,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:43:45,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:43:45,211 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:43:45,211 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:43:45,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:43:45,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:43:45,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:43:45,211 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:43:45,212 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:43:45,212 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:43:45,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:43:45,212 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:43:45,212 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:43:45,213 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:43:45,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:43:45,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:43:45,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:43:45,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:43:45,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:43:45,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:43:45,214 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:43:45,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:43:45,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:43:45,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:43:45,215 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_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2020-11-30 02:43:45,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:43:45,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:43:45,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:43:45,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:43:45,530 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:43:45,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-11-30 02:43:45,632 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/data/bf2e4ca09/df2b11b0dd354fc68e7d83f8dfecfced/FLAG6569f4088 [2020-11-30 02:43:46,187 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:43:46,187 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2020-11-30 02:43:46,196 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/data/bf2e4ca09/df2b11b0dd354fc68e7d83f8dfecfced/FLAG6569f4088 [2020-11-30 02:43:46,525 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/data/bf2e4ca09/df2b11b0dd354fc68e7d83f8dfecfced [2020-11-30 02:43:46,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:43:46,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:43:46,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:43:46,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:43:46,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:43:46,538 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a600622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46, skipping insertion in model container [2020-11-30 02:43:46,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:43:46,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:43:46,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:43:46,745 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:43:46,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:43:46,784 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:43:46,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46 WrapperNode [2020-11-30 02:43:46,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:43:46,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:43:46,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:43:46,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:43:46,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:43:46,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:43:46,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:43:46,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:43:46,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... [2020-11-30 02:43:46,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:43:46,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:43:46,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:43:46,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:43:46,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:43:46,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:43:46,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:43:46,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:43:46,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:43:46,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:43:46,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:43:47,622 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:43:47,623 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:43:47,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:43:47 BoogieIcfgContainer [2020-11-30 02:43:47,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:43:47,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:43:47,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:43:47,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:43:47,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:43:46" (1/3) ... [2020-11-30 02:43:47,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0e2fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:43:47, skipping insertion in model container [2020-11-30 02:43:47,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:43:46" (2/3) ... [2020-11-30 02:43:47,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0e2fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:43:47, skipping insertion in model container [2020-11-30 02:43:47,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:43:47" (3/3) ... [2020-11-30 02:43:47,637 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2020-11-30 02:43:47,651 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:43:47,656 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-30 02:43:47,672 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-30 02:43:47,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:43:47,698 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:43:47,699 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:43:47,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:43:47,699 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:43:47,699 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:43:47,700 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:43:47,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:43:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-11-30 02:43:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:43:47,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:47,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:43:47,725 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:47,733 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2020-11-30 02:43:47,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:47,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349213061] [2020-11-30 02:43:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:47,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349213061] [2020-11-30 02:43:47,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:43:47,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:43:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110547921] [2020-11-30 02:43:47,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:43:47,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:47,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:43:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:43:47,937 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-11-30 02:43:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:48,029 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-11-30 02:43:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:43:48,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:43:48,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:48,045 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:43:48,045 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:43:48,050 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 [2020-11-30 02:43:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:43:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2020-11-30 02:43:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 02:43:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-30 02:43:48,086 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2020-11-30 02:43:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:48,086 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-30 02:43:48,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:43:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-30 02:43:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:43:48,087 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:48,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:43:48,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:43:48,088 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2020-11-30 02:43:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:48,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747122567] [2020-11-30 02:43:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:48,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747122567] [2020-11-30 02:43:48,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:43:48,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:43:48,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881593637] [2020-11-30 02:43:48,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:43:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:48,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:43:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:43:48,158 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-11-30 02:43:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:48,195 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-11-30 02:43:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:43:48,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:43:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:48,197 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:43:48,197 INFO L226 Difference]: Without dead ends: 37 [2020-11-30 02:43:48,198 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 [2020-11-30 02:43:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-11-30 02:43:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2020-11-30 02:43:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:43:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 02:43:48,205 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2020-11-30 02:43:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:48,205 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 02:43:48,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:43:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 02:43:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:43:48,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:48,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:43:48,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:43:48,207 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2020-11-30 02:43:48,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:48,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027843942] [2020-11-30 02:43:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:48,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027843942] [2020-11-30 02:43:48,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:43:48,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:43:48,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976348617] [2020-11-30 02:43:48,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:43:48,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:48,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:43:48,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:43:48,274 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-11-30 02:43:48,399 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2020-11-30 02:43:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:48,475 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-11-30 02:43:48,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:43:48,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-30 02:43:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:48,477 INFO L225 Difference]: With dead ends: 42 [2020-11-30 02:43:48,478 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 02:43:48,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:43:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 02:43:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2020-11-30 02:43:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:43:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 02:43:48,484 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2020-11-30 02:43:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:48,484 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 02:43:48,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:43:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 02:43:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:43:48,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:48,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:43:48,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:43:48,486 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash 95438513, now seen corresponding path program 1 times [2020-11-30 02:43:48,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:48,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822392320] [2020-11-30 02:43:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:48,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822392320] [2020-11-30 02:43:48,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:43:48,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:43:48,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413544241] [2020-11-30 02:43:48,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:43:48,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:43:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:43:48,594 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-11-30 02:43:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:48,660 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-11-30 02:43:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:43:48,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:43:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:48,662 INFO L225 Difference]: With dead ends: 22 [2020-11-30 02:43:48,662 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 02:43:48,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:43:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 02:43:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-30 02:43:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:43:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-30 02:43:48,671 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2020-11-30 02:43:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:48,671 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-30 02:43:48,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:43:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-30 02:43:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:43:48,673 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:48,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:43:48,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:43:48,674 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:48,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:48,676 INFO L82 PathProgramCache]: Analyzing trace with hash 95438514, now seen corresponding path program 1 times [2020-11-30 02:43:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:48,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836635064] [2020-11-30 02:43:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:48,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836635064] [2020-11-30 02:43:48,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:43:48,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:43:48,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598656913] [2020-11-30 02:43:48,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:43:48,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:48,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:43:48,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:43:48,789 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2020-11-30 02:43:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:48,923 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-11-30 02:43:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:43:48,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:43:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:48,925 INFO L225 Difference]: With dead ends: 35 [2020-11-30 02:43:48,925 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:43:48,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:43:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:43:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2020-11-30 02:43:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:43:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 02:43:48,930 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2020-11-30 02:43:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:48,931 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 02:43:48,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:43:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 02:43:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:43:48,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:48,932 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-11-30 02:43:48,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:43:48,933 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1522149287, now seen corresponding path program 1 times [2020-11-30 02:43:48,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:48,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027428508] [2020-11-30 02:43:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:49,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027428508] [2020-11-30 02:43:49,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471095633] [2020-11-30 02:43:49,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:43:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:49,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:43:49,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:43:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:49,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:43:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:49,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:43:49,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2020-11-30 02:43:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319379024] [2020-11-30 02:43:49,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:43:49,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:43:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:43:49,242 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-11-30 02:43:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:49,592 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-11-30 02:43:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:43:49,593 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2020-11-30 02:43:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:49,594 INFO L225 Difference]: With dead ends: 50 [2020-11-30 02:43:49,594 INFO L226 Difference]: Without dead ends: 50 [2020-11-30 02:43:49,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:43:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-30 02:43:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 26. [2020-11-30 02:43:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:43:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-11-30 02:43:49,600 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2020-11-30 02:43:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:49,600 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-11-30 02:43:49,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:43:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-11-30 02:43:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:43:49,601 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:49,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:43:49,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 02:43:49,802 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151379, now seen corresponding path program 1 times [2020-11-30 02:43:49,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:49,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161406710] [2020-11-30 02:43:49,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:43:49,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161406710] [2020-11-30 02:43:49,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:43:49,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:43:49,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371658876] [2020-11-30 02:43:49,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:43:49,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:49,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:43:49,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:43:49,925 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-11-30 02:43:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:49,958 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-11-30 02:43:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:43:49,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 02:43:49,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:49,960 INFO L225 Difference]: With dead ends: 24 [2020-11-30 02:43:49,960 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 02:43:49,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:43:49,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 02:43:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 02:43:49,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:43:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-30 02:43:49,964 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2020-11-30 02:43:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:49,965 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-30 02:43:49,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:43:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-30 02:43:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:43:49,966 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:49,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:43:49,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 02:43:49,966 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151380, now seen corresponding path program 1 times [2020-11-30 02:43:49,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:49,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372821380] [2020-11-30 02:43:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372821380] [2020-11-30 02:43:50,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:43:50,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:43:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818013078] [2020-11-30 02:43:50,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:43:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:43:50,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:43:50,069 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-11-30 02:43:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:50,099 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-30 02:43:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:43:50,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 02:43:50,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:50,100 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:43:50,100 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:43:50,101 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 [2020-11-30 02:43:50,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:43:50,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 02:43:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:43:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-30 02:43:50,104 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2020-11-30 02:43:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:50,105 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-30 02:43:50,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:43:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-30 02:43:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:43:50,106 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:50,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:43:50,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 02:43:50,106 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:50,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash 148383000, now seen corresponding path program 1 times [2020-11-30 02:43:50,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:50,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838452680] [2020-11-30 02:43:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:50,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838452680] [2020-11-30 02:43:50,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510434764] [2020-11-30 02:43:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:43:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:43:50,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:43:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:43:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:50,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087840865] [2020-11-30 02:43:50,305 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 02:43:50,306 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:43:50,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:43:50,319 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:43:50,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:43:50,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:50,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:51,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:52,147 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:43:52,748 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:43:52,919 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-11-30 02:43:53,138 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-11-30 02:43:53,353 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-30 02:43:53,586 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:43:53,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:43:53,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2020-11-30 02:43:53,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537580729] [2020-11-30 02:43:53,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:43:53,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:43:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:43:53,709 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-11-30 02:43:54,162 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2020-11-30 02:43:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:54,287 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-11-30 02:43:54,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:43:54,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-11-30 02:43:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:54,288 INFO L225 Difference]: With dead ends: 27 [2020-11-30 02:43:54,288 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:43:54,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:43:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:43:54,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-11-30 02:43:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:43:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-30 02:43:54,292 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2020-11-30 02:43:54,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:54,292 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-30 02:43:54,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:43:54,292 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-30 02:43:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:43:54,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:54,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:43:54,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:43:54,506 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:54,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:54,507 INFO L82 PathProgramCache]: Analyzing trace with hash 862142579, now seen corresponding path program 1 times [2020-11-30 02:43:54,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:54,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466089067] [2020-11-30 02:43:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:54,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466089067] [2020-11-30 02:43:54,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799661276] [2020-11-30 02:43:54,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:43:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:54,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:43:54,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:43:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:54,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:43:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:54,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191517641] [2020-11-30 02:43:54,655 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:43:54,655 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:43:54,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:43:54,656 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:43:54,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:43:54,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:54,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:54,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:55,674 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:55,714 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:43:56,263 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:43:56,395 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-11-30 02:43:56,530 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-11-30 02:43:56,673 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-30 02:43:56,863 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:43:57,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:43:57,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:43:57,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-11-30 02:43:57,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850155659] [2020-11-30 02:43:57,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:43:57,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:57,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:43:57,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:43:57,143 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2020-11-30 02:43:57,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:57,224 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-11-30 02:43:57,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:43:57,225 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-11-30 02:43:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:57,226 INFO L225 Difference]: With dead ends: 67 [2020-11-30 02:43:57,226 INFO L226 Difference]: Without dead ends: 67 [2020-11-30 02:43:57,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:43:57,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-30 02:43:57,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2020-11-30 02:43:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 02:43:57,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2020-11-30 02:43:57,232 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 12 [2020-11-30 02:43:57,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:57,233 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2020-11-30 02:43:57,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:43:57,233 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2020-11-30 02:43:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:43:57,233 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:57,234 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2020-11-30 02:43:57,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-30 02:43:57,435 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:57,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1163785730, now seen corresponding path program 1 times [2020-11-30 02:43:57,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:57,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537741255] [2020-11-30 02:43:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:43:57,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537741255] [2020-11-30 02:43:57,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636601851] [2020-11-30 02:43:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:43:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:57,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:43:57,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:43:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:43:57,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:43:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:43:57,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576614832] [2020-11-30 02:43:57,586 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:43:57,586 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:43:57,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:43:57,587 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:43:57,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:43:57,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:57,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:57,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:43:58,348 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:43:58,489 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-11-30 02:43:58,956 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:43:59,086 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-11-30 02:43:59,254 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-11-30 02:43:59,384 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-30 02:43:59,533 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:43:59,534 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:43:59,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:43:59,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-11-30 02:43:59,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934311407] [2020-11-30 02:43:59,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:43:59,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:43:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:43:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:43:59,536 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand 6 states. [2020-11-30 02:43:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:43:59,597 INFO L93 Difference]: Finished difference Result 146 states and 202 transitions. [2020-11-30 02:43:59,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:43:59,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-30 02:43:59,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:43:59,608 INFO L225 Difference]: With dead ends: 146 [2020-11-30 02:43:59,608 INFO L226 Difference]: Without dead ends: 146 [2020-11-30 02:43:59,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:43:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-30 02:43:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 75. [2020-11-30 02:43:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 02:43:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2020-11-30 02:43:59,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 13 [2020-11-30 02:43:59,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:43:59,627 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2020-11-30 02:43:59,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:43:59,627 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2020-11-30 02:43:59,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:43:59,628 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:43:59,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2020-11-30 02:43:59,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:43:59,854 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:43:59,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:43:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1163783637, now seen corresponding path program 1 times [2020-11-30 02:43:59,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:43:59,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8441101] [2020-11-30 02:43:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:43:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:43:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8441101] [2020-11-30 02:43:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225664116] [2020-11-30 02:43:59,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:43:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:43:59,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:43:59,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:44:00,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:44:00,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2037922055] [2020-11-30 02:44:00,064 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:44:00,065 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:00,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:00,065 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:00,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:00,134 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:00,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:00,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:00,819 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:01,003 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-11-30 02:44:01,342 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:01,773 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:01,774 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:01,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:01,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-11-30 02:44:01,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573808453] [2020-11-30 02:44:01,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:44:01,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:01,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:44:01,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:44:01,776 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand 10 states. [2020-11-30 02:44:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:01,935 INFO L93 Difference]: Finished difference Result 78 states and 104 transitions. [2020-11-30 02:44:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:44:01,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-30 02:44:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:01,936 INFO L225 Difference]: With dead ends: 78 [2020-11-30 02:44:01,936 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 02:44:01,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-11-30 02:44:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 02:44:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-11-30 02:44:01,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-30 02:44:01,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 103 transitions. [2020-11-30 02:44:01,942 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 103 transitions. Word has length 13 [2020-11-30 02:44:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:01,942 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 103 transitions. [2020-11-30 02:44:01,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:44:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 103 transitions. [2020-11-30 02:44:01,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:44:01,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:01,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-11-30 02:44:02,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:02,144 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:02,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:02,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1717619208, now seen corresponding path program 1 times [2020-11-30 02:44:02,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:02,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478671489] [2020-11-30 02:44:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:44:02,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478671489] [2020-11-30 02:44:02,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623409782] [2020-11-30 02:44:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 02:44:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:44:02,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 02:44:02,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [464263542] [2020-11-30 02:44:02,376 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:44:02,376 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:02,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:02,376 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:02,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:02,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:02,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:02,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:03,022 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:03,438 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:03,872 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:03,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:03,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 8 [2020-11-30 02:44:03,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139029173] [2020-11-30 02:44:03,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:44:03,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:03,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:44:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:44:03,874 INFO L87 Difference]: Start difference. First operand 75 states and 103 transitions. Second operand 10 states. [2020-11-30 02:44:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:04,091 INFO L93 Difference]: Finished difference Result 120 states and 158 transitions. [2020-11-30 02:44:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:44:04,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-30 02:44:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:04,092 INFO L225 Difference]: With dead ends: 120 [2020-11-30 02:44:04,093 INFO L226 Difference]: Without dead ends: 120 [2020-11-30 02:44:04,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-11-30 02:44:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-30 02:44:04,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 74. [2020-11-30 02:44:04,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-30 02:44:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-11-30 02:44:04,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 14 [2020-11-30 02:44:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:04,099 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-11-30 02:44:04,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:44:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-11-30 02:44:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-30 02:44:04,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:04,100 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1] [2020-11-30 02:44:04,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:04,314 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:04,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1364564582, now seen corresponding path program 2 times [2020-11-30 02:44:04,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:04,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406412021] [2020-11-30 02:44:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:44:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406412021] [2020-11-30 02:44:04,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130446625] [2020-11-30 02:44:04,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:04,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:44:04,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:44:04,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:44:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:44:04,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:44:04,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1541797285] [2020-11-30 02:44:04,580 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:44:04,580 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:04,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:04,580 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:04,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:04,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:04,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:04,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:05,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:05,232 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:05,355 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-11-30 02:44:05,667 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:06,079 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:06,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:06,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:06,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 2] total 7 [2020-11-30 02:44:06,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527615855] [2020-11-30 02:44:06,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:44:06,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:06,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:44:06,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:44:06,081 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 9 states. [2020-11-30 02:44:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:06,158 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-11-30 02:44:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:44:06,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-11-30 02:44:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:06,159 INFO L225 Difference]: With dead ends: 92 [2020-11-30 02:44:06,159 INFO L226 Difference]: Without dead ends: 92 [2020-11-30 02:44:06,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:44:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-30 02:44:06,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2020-11-30 02:44:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-30 02:44:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-11-30 02:44:06,165 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 16 [2020-11-30 02:44:06,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:06,165 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-11-30 02:44:06,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:44:06,166 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-11-30 02:44:06,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 02:44:06,166 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:06,167 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1] [2020-11-30 02:44:06,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:06,382 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:06,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1721852877, now seen corresponding path program 2 times [2020-11-30 02:44:06,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:06,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353534143] [2020-11-30 02:44:06,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-30 02:44:06,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353534143] [2020-11-30 02:44:06,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381357106] [2020-11-30 02:44:06,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:06,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:44:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:44:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:44:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-30 02:44:06,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-30 02:44:06,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [267617113] [2020-11-30 02:44:06,686 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:44:06,686 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:06,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:06,687 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:06,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:06,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:06,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:06,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:07,307 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:07,434 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-11-30 02:44:07,813 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:08,150 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-30 02:44:08,295 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:08,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:08,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:08,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2020-11-30 02:44:08,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705511578] [2020-11-30 02:44:08,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 02:44:08,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 02:44:08,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-11-30 02:44:08,299 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 15 states. [2020-11-30 02:44:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:08,696 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-11-30 02:44:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:44:08,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-11-30 02:44:08,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:08,698 INFO L225 Difference]: With dead ends: 86 [2020-11-30 02:44:08,698 INFO L226 Difference]: Without dead ends: 86 [2020-11-30 02:44:08,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2020-11-30 02:44:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-30 02:44:08,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2020-11-30 02:44:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-30 02:44:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2020-11-30 02:44:08,704 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 22 [2020-11-30 02:44:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:08,704 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2020-11-30 02:44:08,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 02:44:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2020-11-30 02:44:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-30 02:44:08,706 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:08,707 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-11-30 02:44:08,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-11-30 02:44:08,922 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1364720339, now seen corresponding path program 2 times [2020-11-30 02:44:08,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:08,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145374556] [2020-11-30 02:44:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-30 02:44:09,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145374556] [2020-11-30 02:44:09,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157126273] [2020-11-30 02:44:09,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/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 [2020-11-30 02:44:09,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 02:44:09,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:44:09,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:44:09,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-30 02:44:09,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-30 02:44:09,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:44:09,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [7] total 11 [2020-11-30 02:44:09,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162114982] [2020-11-30 02:44:09,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:44:09,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:09,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:44:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:44:09,261 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand 6 states. [2020-11-30 02:44:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:09,299 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2020-11-30 02:44:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:44:09,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-11-30 02:44:09,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:09,301 INFO L225 Difference]: With dead ends: 59 [2020-11-30 02:44:09,301 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 02:44:09,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:44:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 02:44:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2020-11-30 02:44:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-30 02:44:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-30 02:44:09,305 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2020-11-30 02:44:09,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:09,306 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-30 02:44:09,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:44:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-30 02:44:09,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-30 02:44:09,308 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:09,308 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2020-11-30 02:44:09,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2020-11-30 02:44:09,514 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:09,515 INFO L82 PathProgramCache]: Analyzing trace with hash 643346751, now seen corresponding path program 1 times [2020-11-30 02:44:09,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:09,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161436125] [2020-11-30 02:44:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 02:44:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161436125] [2020-11-30 02:44:09,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531299022] [2020-11-30 02:44:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:09,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:44:09,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 02:44:09,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 68 proven. 32 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-30 02:44:09,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1040939466] [2020-11-30 02:44:09,848 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:44:09,849 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:09,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:09,849 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:09,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:09,942 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:10,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:10,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:10,798 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:11,248 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:11,510 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-11-30 02:44:11,645 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-30 02:44:11,835 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:11,968 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:11,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:11,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2020-11-30 02:44:11,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494143116] [2020-11-30 02:44:11,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:44:11,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:44:11,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-11-30 02:44:11,970 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 13 states. [2020-11-30 02:44:12,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:12,240 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-11-30 02:44:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:44:12,240 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2020-11-30 02:44:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:12,241 INFO L225 Difference]: With dead ends: 70 [2020-11-30 02:44:12,241 INFO L226 Difference]: Without dead ends: 70 [2020-11-30 02:44:12,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2020-11-30 02:44:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-30 02:44:12,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2020-11-30 02:44:12,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 02:44:12,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-11-30 02:44:12,245 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 40 [2020-11-30 02:44:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:12,245 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-11-30 02:44:12,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:44:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-11-30 02:44:12,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-30 02:44:12,247 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:12,247 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2020-11-30 02:44:12,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2020-11-30 02:44:12,448 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:12,449 INFO L82 PathProgramCache]: Analyzing trace with hash 195207405, now seen corresponding path program 2 times [2020-11-30 02:44:12,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:12,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235268995] [2020-11-30 02:44:12,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-11-30 02:44:12,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235268995] [2020-11-30 02:44:12,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313416183] [2020-11-30 02:44:12,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:12,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:44:12,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:44:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:44:12,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-11-30 02:44:12,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-11-30 02:44:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1065390264] [2020-11-30 02:44:12,914 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:44:12,915 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:12,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:12,915 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:12,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:13,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:13,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:13,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:13,809 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:14,355 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:14,608 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-11-30 02:44:14,743 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-11-30 02:44:14,986 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:15,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:15,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:15,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2020-11-30 02:44:15,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100302719] [2020-11-30 02:44:15,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 02:44:15,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:15,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 02:44:15,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:44:15,147 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 15 states. [2020-11-30 02:44:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:15,486 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2020-11-30 02:44:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 02:44:15,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-11-30 02:44:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:15,488 INFO L225 Difference]: With dead ends: 86 [2020-11-30 02:44:15,488 INFO L226 Difference]: Without dead ends: 86 [2020-11-30 02:44:15,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-11-30 02:44:15,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-30 02:44:15,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-11-30 02:44:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-30 02:44:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-11-30 02:44:15,492 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 46 [2020-11-30 02:44:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:15,492 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-11-30 02:44:15,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 02:44:15,492 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-11-30 02:44:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-30 02:44:15,493 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:15,494 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 5, 5, 4, 1, 1] [2020-11-30 02:44:15,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2020-11-30 02:44:15,702 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash -468192513, now seen corresponding path program 3 times [2020-11-30 02:44:15,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:15,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267482319] [2020-11-30 02:44:15,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-30 02:44:15,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267482319] [2020-11-30 02:44:15,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478713088] [2020-11-30 02:44:15,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:15,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:44:15,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:44:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:44:15,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 140 proven. 118 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-30 02:44:16,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 140 proven. 118 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-11-30 02:44:16,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1993324420] [2020-11-30 02:44:16,241 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:44:16,242 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:16,242 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:16,243 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:16,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:16,311 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:16,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:16,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:16,952 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:17,182 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-11-30 02:44:17,608 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:18,057 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:18,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:18,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2020-11-30 02:44:18,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621368695] [2020-11-30 02:44:18,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 02:44:18,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 02:44:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2020-11-30 02:44:18,059 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 20 states. [2020-11-30 02:44:18,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:18,852 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-11-30 02:44:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-30 02:44:18,853 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-11-30 02:44:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:18,854 INFO L225 Difference]: With dead ends: 79 [2020-11-30 02:44:18,854 INFO L226 Difference]: Without dead ends: 79 [2020-11-30 02:44:18,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=404, Invalid=1666, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 02:44:18,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-30 02:44:18,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-11-30 02:44:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 02:44:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-11-30 02:44:18,858 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 52 [2020-11-30 02:44:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:18,858 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-11-30 02:44:18,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 02:44:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-11-30 02:44:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-30 02:44:18,860 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:18,860 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 1, 1] [2020-11-30 02:44:19,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2020-11-30 02:44:19,074 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:19,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:19,075 INFO L82 PathProgramCache]: Analyzing trace with hash -168928524, now seen corresponding path program 4 times [2020-11-30 02:44:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:19,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571893115] [2020-11-30 02:44:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-30 02:44:19,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571893115] [2020-11-30 02:44:19,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200795862] [2020-11-30 02:44:19,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-30 02:44:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-30 02:44:19,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-30 02:44:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602294342] [2020-11-30 02:44:19,786 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 02:44:19,786 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:19,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:19,787 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:19,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:19,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:19,941 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:19,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:20,491 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:20,683 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-11-30 02:44:21,038 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:21,517 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:21,519 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:21,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:21,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 16 [2020-11-30 02:44:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745843344] [2020-11-30 02:44:21,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:44:21,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:21,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:44:21,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:44:21,521 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 18 states. [2020-11-30 02:44:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:21,805 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2020-11-30 02:44:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:44:21,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-11-30 02:44:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:21,806 INFO L225 Difference]: With dead ends: 185 [2020-11-30 02:44:21,807 INFO L226 Difference]: Without dead ends: 185 [2020-11-30 02:44:21,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2020-11-30 02:44:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-11-30 02:44:21,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-11-30 02:44:21,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-11-30 02:44:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 200 transitions. [2020-11-30 02:44:21,812 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 200 transitions. Word has length 61 [2020-11-30 02:44:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:21,812 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 200 transitions. [2020-11-30 02:44:21,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:44:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 200 transitions. [2020-11-30 02:44:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-11-30 02:44:21,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:21,814 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2020-11-30 02:44:22,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2020-11-30 02:44:22,030 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:22,030 INFO L82 PathProgramCache]: Analyzing trace with hash 563326648, now seen corresponding path program 3 times [2020-11-30 02:44:22,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:22,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448113901] [2020-11-30 02:44:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 350 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-11-30 02:44:22,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448113901] [2020-11-30 02:44:22,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185737736] [2020-11-30 02:44:22,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:22,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:44:22,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:44:22,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:44:22,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:22,392 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-30 02:44:22,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 345 proven. 31 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-11-30 02:44:22,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508145548] [2020-11-30 02:44:22,657 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:44:22,658 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:22,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:22,658 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:22,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:22,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:22,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:22,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:23,356 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:23,772 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:24,287 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:24,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:24,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:24,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 26 [2020-11-30 02:44:24,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035154376] [2020-11-30 02:44:24,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 02:44:24,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:24,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 02:44:24,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2020-11-30 02:44:24,508 INFO L87 Difference]: Start difference. First operand 185 states and 200 transitions. Second operand 27 states. [2020-11-30 02:44:25,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:25,163 INFO L93 Difference]: Finished difference Result 193 states and 207 transitions. [2020-11-30 02:44:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:44:25,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2020-11-30 02:44:25,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:25,165 INFO L225 Difference]: With dead ends: 193 [2020-11-30 02:44:25,166 INFO L226 Difference]: Without dead ends: 193 [2020-11-30 02:44:25,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 02:44:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-30 02:44:25,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-11-30 02:44:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-11-30 02:44:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 202 transitions. [2020-11-30 02:44:25,173 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 202 transitions. Word has length 76 [2020-11-30 02:44:25,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:25,175 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 202 transitions. [2020-11-30 02:44:25,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 02:44:25,175 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 202 transitions. [2020-11-30 02:44:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-30 02:44:25,177 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:25,177 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 6, 6, 6, 6, 5, 5, 1, 1, 1] [2020-11-30 02:44:25,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:25,390 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:25,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:25,390 INFO L82 PathProgramCache]: Analyzing trace with hash -82073872, now seen corresponding path program 4 times [2020-11-30 02:44:25,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:25,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747251865] [2020-11-30 02:44:25,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-11-30 02:44:25,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747251865] [2020-11-30 02:44:25,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226139905] [2020-11-30 02:44:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 02:44:25,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:25,864 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-30 02:44:25,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 361 proven. 305 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-30 02:44:26,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091226305] [2020-11-30 02:44:26,027 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 02:44:26,027 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:44:26,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:44:26,028 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:44:26,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:44:26,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:26,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:26,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:44:26,619 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:44:26,984 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2020-11-30 02:44:27,438 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-11-30 02:44:27,585 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:44:27,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:44:27,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 26 [2020-11-30 02:44:27,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83692209] [2020-11-30 02:44:27,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-30 02:44:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-30 02:44:27,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2020-11-30 02:44:27,587 INFO L87 Difference]: Start difference. First operand 188 states and 202 transitions. Second operand 27 states. [2020-11-30 02:44:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:28,973 INFO L93 Difference]: Finished difference Result 227 states and 240 transitions. [2020-11-30 02:44:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-30 02:44:28,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 97 [2020-11-30 02:44:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:28,977 INFO L225 Difference]: With dead ends: 227 [2020-11-30 02:44:28,977 INFO L226 Difference]: Without dead ends: 227 [2020-11-30 02:44:28,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=977, Invalid=5029, Unknown=0, NotChecked=0, Total=6006 [2020-11-30 02:44:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-11-30 02:44:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 206. [2020-11-30 02:44:28,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-11-30 02:44:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 219 transitions. [2020-11-30 02:44:28,984 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 219 transitions. Word has length 97 [2020-11-30 02:44:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:28,985 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 219 transitions. [2020-11-30 02:44:28,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-30 02:44:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 219 transitions. [2020-11-30 02:44:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-30 02:44:28,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:44:28,987 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 7, 7, 7, 6, 5, 5, 1, 1, 1] [2020-11-30 02:44:29,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:29,214 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:44:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:44:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1389824217, now seen corresponding path program 5 times [2020-11-30 02:44:29,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:44:29,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566417533] [2020-11-30 02:44:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:44:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:44:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-11-30 02:44:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566417533] [2020-11-30 02:44:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705709288] [2020-11-30 02:44:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:29,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:44:29,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:44:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:44:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:44:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2020-11-30 02:44:29,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:44:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1331 trivial. 0 not checked. [2020-11-30 02:44:29,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:44:29,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 20 [2020-11-30 02:44:29,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62768002] [2020-11-30 02:44:29,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:44:29,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:44:29,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:44:29,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-11-30 02:44:29,720 INFO L87 Difference]: Start difference. First operand 206 states and 219 transitions. Second operand 7 states. [2020-11-30 02:44:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:44:29,827 INFO L93 Difference]: Finished difference Result 204 states and 217 transitions. [2020-11-30 02:44:29,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:44:29,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2020-11-30 02:44:29,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:44:29,828 INFO L225 Difference]: With dead ends: 204 [2020-11-30 02:44:29,828 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:44:29,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-11-30 02:44:29,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:44:29,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:44:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:44:29,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:44:29,829 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 121 [2020-11-30 02:44:29,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:44:29,829 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:44:29,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:44:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:44:29,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:44:30,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:44:30,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:44:30 BoogieIcfgContainer [2020-11-30 02:44:30,034 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:44:30,035 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:44:30,035 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:44:30,035 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:44:30,035 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:43:47" (3/4) ... [2020-11-30 02:44:30,037 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:44:30,045 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-30 02:44:30,045 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-11-30 02:44:30,045 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:44:30,077 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6152b3a8-9931-4f5d-8b0f-693e9d3c20d5/bin/utaipan/witness.graphml [2020-11-30 02:44:30,077 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:44:30,078 INFO L168 Benchmark]: Toolchain (without parser) took 43547.60 ms. Allocated memory was 113.2 MB in the beginning and 360.7 MB in the end (delta: 247.5 MB). Free memory was 80.4 MB in the beginning and 186.5 MB in the end (delta: -106.1 MB). Peak memory consumption was 142.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:44:30,078 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 75.5 MB. Free memory was 34.8 MB in the beginning and 34.8 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:44:30,078 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.80 ms. Allocated memory is still 113.2 MB. Free memory was 80.3 MB in the beginning and 90.8 MB in the end (delta: -10.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:44:30,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.39 ms. Allocated memory is still 113.2 MB. Free memory was 90.8 MB in the beginning and 89.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:44:30,079 INFO L168 Benchmark]: Boogie Preprocessor took 27.70 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 88.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:44:30,079 INFO L168 Benchmark]: RCFGBuilder took 756.73 ms. Allocated memory is still 113.2 MB. Free memory was 88.2 MB in the beginning and 66.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:44:30,079 INFO L168 Benchmark]: TraceAbstraction took 42406.35 ms. Allocated memory was 113.2 MB in the beginning and 360.7 MB in the end (delta: 247.5 MB). Free memory was 66.4 MB in the beginning and 189.7 MB in the end (delta: -123.3 MB). Peak memory consumption was 128.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:44:30,080 INFO L168 Benchmark]: Witness Printer took 42.91 ms. Allocated memory is still 360.7 MB. Free memory was 188.6 MB in the beginning and 186.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:44:30,081 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 75.5 MB. Free memory was 34.8 MB in the beginning and 34.8 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.80 ms. Allocated memory is still 113.2 MB. Free memory was 80.3 MB in the beginning and 90.8 MB in the end (delta: -10.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.39 ms. Allocated memory is still 113.2 MB. Free memory was 90.8 MB in the beginning and 89.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.70 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 88.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 756.73 ms. Allocated memory is still 113.2 MB. Free memory was 88.2 MB in the beginning and 66.6 MB in the end (delta: 21.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 42406.35 ms. Allocated memory was 113.2 MB in the beginning and 360.7 MB in the end (delta: 247.5 MB). Free memory was 66.4 MB in the beginning and 189.7 MB in the end (delta: -123.3 MB). Peak memory consumption was 128.3 MB. Max. memory is 16.1 GB. * Witness Printer took 42.91 ms. Allocated memory is still 360.7 MB. Free memory was 188.6 MB in the beginning and 186.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42.3s, OverallIterations: 23, TraceHistogramMax: 27, AutomataDifference: 6.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 227 SDtfs, 1507 SDslu, 567 SDs, 0 SdLazy, 2680 SolverSat, 433 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1950 GetRequests, 1523 SyntacticMatches, 6 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4033 ImplicationChecksByTransitivity, 20.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 314 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 1314 NumberOfCodeBlocks, 1116 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 1898 ConstructedInterpolants, 68 QuantifiedInterpolants, 641521 SizeOfPredicates, 51 NumberOfNonLiveVariables, 2466 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 55 InterpolantComputations, 12 PerfectInterpolantSequences, 6805/11381 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]: 1843, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 33, TOOLS_POST_TIME[ms]: 751, 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: 32, TOOLS_QUANTIFIERELIM_TIME[ms]: 725, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 129, FLUID_QUERY_TIME[ms]: 5, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 592, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME[ms]: 377, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 25, DOMAIN_ISBOTTOM_APPLICATIONS: 12, DOMAIN_ISBOTTOM_TIME[ms]: 38, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1457, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1456, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, 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]: 3, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 10, DAG_COMPRESSION_PROCESSED_NODES: 77, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...