./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/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 50bdaf600d03af0a677a59daf6a875dbe69c10b2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:06:58,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:06:58,048 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:06:58,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:06:58,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:06:58,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:06:58,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:06:58,075 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:06:58,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:06:58,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:06:58,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:06:58,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:06:58,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:06:58,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:06:58,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:06:58,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:06:58,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:06:58,085 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:06:58,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:06:58,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:06:58,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:06:58,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:06:58,093 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:06:58,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:06:58,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:06:58,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:06:58,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:06:58,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:06:58,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:06:58,101 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:06:58,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:06:58,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:06:58,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:06:58,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:06:58,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:06:58,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:06:58,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:06:58,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:06:58,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:06:58,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:06:58,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:06:58,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 18:06:58,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:06:58,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:06:58,133 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:06:58,133 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:06:58,133 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:06:58,133 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:06:58,133 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:06:58,134 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:06:58,134 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:06:58,134 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:06:58,134 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:06:58,134 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:06:58,135 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:06:58,135 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:06:58,135 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:06:58,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 18:06:58,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 18:06:58,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:06:58,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:06:58,136 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 18:06:58,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:06:58,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:06:58,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:06:58,137 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 18:06:58,137 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 18:06:58,138 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 18:06:58,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:06:58,138 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:06:58,138 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:06:58,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:06:58,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:06:58,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:06:58,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:06:58,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:06:58,139 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:06:58,140 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:06:58,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:06:58,140 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:06:58,140 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:06:58,140 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_b509e72c-e27d-4311-b1ac-0353f72651ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50bdaf600d03af0a677a59daf6a875dbe69c10b2 [2020-12-09 18:06:58,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:06:58,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:06:58,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:06:58,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:06:58,327 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:06:58,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-12-09 18:06:58,370 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/data/42c61794d/745a96069ae7457a91229e1ed01796a4/FLAG468030756 [2020-12-09 18:06:58,768 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:06:58,768 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2020-12-09 18:06:58,777 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/data/42c61794d/745a96069ae7457a91229e1ed01796a4/FLAG468030756 [2020-12-09 18:06:58,786 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/data/42c61794d/745a96069ae7457a91229e1ed01796a4 [2020-12-09 18:06:58,788 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:06:58,789 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:06:58,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:06:58,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:06:58,793 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:06:58,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:06:58" (1/1) ... [2020-12-09 18:06:58,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67a8a602 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:58, skipping insertion in model container [2020-12-09 18:06:58,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:06:58" (1/1) ... [2020-12-09 18:06:58,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:06:58,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:06:59,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:06:59,034 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:06:59,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:06:59,095 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:06:59,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59 WrapperNode [2020-12-09 18:06:59,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:06:59,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:06:59,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:06:59,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:06:59,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:06:59,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:06:59,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:06:59,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:06:59,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... [2020-12-09 18:06:59,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:06:59,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:06:59,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:06:59,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:06:59,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:06:59,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 18:06:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 18:06:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:06:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 18:06:59,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:06:59,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:06:59,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:06:59,482 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 18:06:59,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:06:59 BoogieIcfgContainer [2020-12-09 18:06:59,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:06:59,485 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:06:59,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:06:59,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:06:59,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:06:58" (1/3) ... [2020-12-09 18:06:59,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a67aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:06:59, skipping insertion in model container [2020-12-09 18:06:59,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:06:59" (2/3) ... [2020-12-09 18:06:59,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a67aee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:06:59, skipping insertion in model container [2020-12-09 18:06:59,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:06:59" (3/3) ... [2020-12-09 18:06:59,490 INFO L111 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2020-12-09 18:06:59,499 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:06:59,502 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-12-09 18:06:59,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-12-09 18:06:59,523 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:06:59,523 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 18:06:59,523 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:06:59,523 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:06:59,523 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:06:59,524 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:06:59,524 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:06:59,524 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:06:59,532 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-09 18:06:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 18:06:59,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:06:59,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 18:06:59,537 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:06:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:06:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash 104334, now seen corresponding path program 1 times [2020-12-09 18:06:59,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:06:59,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569817421] [2020-12-09 18:06:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:06:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:06:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:06:59,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569817421] [2020-12-09 18:06:59,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:06:59,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 18:06:59,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13755922] [2020-12-09 18:06:59,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:06:59,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:06:59,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:06:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:06:59,666 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-09 18:06:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:06:59,701 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-12-09 18:06:59,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:06:59,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 18:06:59,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:06:59,708 INFO L225 Difference]: With dead ends: 22 [2020-12-09 18:06:59,708 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 18:06:59,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:06:59,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 18:06:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-09 18:06:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 18:06:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-09 18:06:59,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 3 [2020-12-09 18:06:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:06:59,730 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-09 18:06:59,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:06:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-09 18:06:59,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 18:06:59,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:06:59,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 18:06:59,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:06:59,731 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:06:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:06:59,732 INFO L82 PathProgramCache]: Analyzing trace with hash 104335, now seen corresponding path program 1 times [2020-12-09 18:06:59,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:06:59,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428434286] [2020-12-09 18:06:59,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:06:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:06:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:06:59,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428434286] [2020-12-09 18:06:59,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:06:59,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:06:59,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827474034] [2020-12-09 18:06:59,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:06:59,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:06:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:06:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:06:59,789 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2020-12-09 18:06:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:06:59,851 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-09 18:06:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:06:59,852 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-12-09 18:06:59,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:06:59,853 INFO L225 Difference]: With dead ends: 40 [2020-12-09 18:06:59,853 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 18:06:59,854 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 [2020-12-09 18:06:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 18:06:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-12-09 18:06:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 18:06:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-09 18:06:59,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 3 [2020-12-09 18:06:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:06:59,859 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-09 18:06:59,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:06:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-09 18:06:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 18:06:59,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:06:59,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 18:06:59,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 18:06:59,860 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:06:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:06:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash 106111, now seen corresponding path program 1 times [2020-12-09 18:06:59,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:06:59,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011900963] [2020-12-09 18:06:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:06:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:06:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:06:59,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011900963] [2020-12-09 18:06:59,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:06:59,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 18:06:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112666604] [2020-12-09 18:06:59,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:06:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:06:59,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:06:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:06:59,916 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2020-12-09 18:06:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:06:59,935 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-09 18:06:59,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:06:59,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 18:06:59,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:06:59,936 INFO L225 Difference]: With dead ends: 22 [2020-12-09 18:06:59,936 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 18:06:59,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:06:59,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 18:06:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-09 18:06:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 18:06:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-09 18:06:59,939 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 3 [2020-12-09 18:06:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:06:59,940 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-09 18:06:59,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:06:59,940 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-09 18:06:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 18:06:59,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:06:59,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 18:06:59,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 18:06:59,941 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:06:59,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:06:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 3290841, now seen corresponding path program 1 times [2020-12-09 18:06:59,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:06:59,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132129728] [2020-12-09 18:06:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:06:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:06:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:06:59,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132129728] [2020-12-09 18:06:59,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:06:59,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:06:59,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156575761] [2020-12-09 18:06:59,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 18:06:59,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:06:59,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 18:06:59,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:06:59,978 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2020-12-09 18:06:59,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:06:59,998 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-12-09 18:06:59,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 18:06:59,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 18:06:59,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:06:59,999 INFO L225 Difference]: With dead ends: 19 [2020-12-09 18:06:59,999 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 18:07:00,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 18:07:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 18:07:00,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 18:07:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 18:07:00,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 18:07:00,002 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2020-12-09 18:07:00,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:00,002 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 18:07:00,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 18:07:00,003 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 18:07:00,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 18:07:00,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:00,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 18:07:00,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 18:07:00,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:00,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:00,004 INFO L82 PathProgramCache]: Analyzing trace with hash 3290842, now seen corresponding path program 1 times [2020-12-09 18:07:00,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:00,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701728628] [2020-12-09 18:07:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:00,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:00,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701728628] [2020-12-09 18:07:00,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:07:00,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:07:00,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872031369] [2020-12-09 18:07:00,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:07:00,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:00,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:07:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:07:00,088 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-12-09 18:07:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:00,123 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-12-09 18:07:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:07:00,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 18:07:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:00,124 INFO L225 Difference]: With dead ends: 18 [2020-12-09 18:07:00,124 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 18:07:00,125 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 [2020-12-09 18:07:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 18:07:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 18:07:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 18:07:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-09 18:07:00,127 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 4 [2020-12-09 18:07:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:00,127 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-09 18:07:00,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:07:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-09 18:07:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 18:07:00,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:00,128 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-12-09 18:07:00,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 18:07:00,128 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash 100314532, now seen corresponding path program 1 times [2020-12-09 18:07:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:00,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801822797] [2020-12-09 18:07:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801822797] [2020-12-09 18:07:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202638900] [2020-12-09 18:07:00,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:00,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 18:07:00,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:00,261 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-12-09 18:07:00,262 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 18:07:00,269 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 18:07:00,270 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 18:07:00,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-12-09 18:07:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:00,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:00,362 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 18:07:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:00,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929554573] [2020-12-09 18:07:00,401 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-12-09 18:07:00,401 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:00,404 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:00,408 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:00,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:00,709 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:00,954 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:01,004 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:01,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:01,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-12-09 18:07:01,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457979235] [2020-12-09 18:07:01,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 18:07:01,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 18:07:01,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-09 18:07:01,005 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 11 states. [2020-12-09 18:07:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:01,109 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-09 18:07:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:07:01,109 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2020-12-09 18:07:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:01,110 INFO L225 Difference]: With dead ends: 42 [2020-12-09 18:07:01,110 INFO L226 Difference]: Without dead ends: 42 [2020-12-09 18:07:01,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-09 18:07:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-09 18:07:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 15. [2020-12-09 18:07:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 18:07:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-09 18:07:01,112 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2020-12-09 18:07:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:01,112 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-09 18:07:01,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 18:07:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-09 18:07:01,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 18:07:01,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:01,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:07:01,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 18:07:01,314 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:01,315 INFO L82 PathProgramCache]: Analyzing trace with hash -746792725, now seen corresponding path program 1 times [2020-12-09 18:07:01,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:01,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624155092] [2020-12-09 18:07:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:01,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624155092] [2020-12-09 18:07:01,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:07:01,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 18:07:01,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118699125] [2020-12-09 18:07:01,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:07:01,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:07:01,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:07:01,461 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-12-09 18:07:01,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:01,484 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-12-09 18:07:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 18:07:01,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 18:07:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:01,485 INFO L225 Difference]: With dead ends: 14 [2020-12-09 18:07:01,485 INFO L226 Difference]: Without dead ends: 12 [2020-12-09 18:07:01,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:07:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-09 18:07:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-09 18:07:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-09 18:07:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-09 18:07:01,487 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2020-12-09 18:07:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:01,487 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-09 18:07:01,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:07:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-09 18:07:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 18:07:01,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:01,488 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:07:01,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-09 18:07:01,488 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:01,489 INFO L82 PathProgramCache]: Analyzing trace with hash -407205654, now seen corresponding path program 1 times [2020-12-09 18:07:01,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:01,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411908366] [2020-12-09 18:07:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:01,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411908366] [2020-12-09 18:07:01,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:07:01,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:07:01,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151428707] [2020-12-09 18:07:01,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 18:07:01,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:01,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 18:07:01,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:07:01,591 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 6 states. [2020-12-09 18:07:01,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:01,685 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-12-09 18:07:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 18:07:01,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 18:07:01,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:01,685 INFO L225 Difference]: With dead ends: 17 [2020-12-09 18:07:01,685 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 18:07:01,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 18:07:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 18:07:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-09 18:07:01,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 18:07:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-09 18:07:01,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-12-09 18:07:01,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:01,687 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-09 18:07:01,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 18:07:01,687 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-09 18:07:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 18:07:01,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:01,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:07:01,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-09 18:07:01,687 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash -286393537, now seen corresponding path program 1 times [2020-12-09 18:07:01,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:01,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361205534] [2020-12-09 18:07:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:01,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361205534] [2020-12-09 18:07:01,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214947564] [2020-12-09 18:07:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 18:07:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:01,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296170307] [2020-12-09 18:07:01,895 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:01,895 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:01,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:01,895 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:01,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:02,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:02,931 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:03,198 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:03,474 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:03,729 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:03,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:03,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2020-12-09 18:07:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802147941] [2020-12-09 18:07:03,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 18:07:03,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 18:07:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-12-09 18:07:03,730 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 13 states. [2020-12-09 18:07:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:03,869 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-12-09 18:07:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 18:07:03,869 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-12-09 18:07:03,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:03,870 INFO L225 Difference]: With dead ends: 25 [2020-12-09 18:07:03,870 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 18:07:03,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-12-09 18:07:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 18:07:03,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2020-12-09 18:07:03,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 18:07:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-09 18:07:03,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2020-12-09 18:07:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:03,872 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-09 18:07:03,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 18:07:03,872 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-09 18:07:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 18:07:03,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:03,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 18:07:04,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-09 18:07:04,074 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:04,075 INFO L82 PathProgramCache]: Analyzing trace with hash 403880869, now seen corresponding path program 2 times [2020-12-09 18:07:04,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:04,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672454332] [2020-12-09 18:07:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:04,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672454332] [2020-12-09 18:07:04,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085882945] [2020-12-09 18:07:04,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:04,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 18:07:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:07:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 18:07:04,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:04,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1735652585] [2020-12-09 18:07:04,558 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:04,558 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:04,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:04,558 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:04,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:04,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:04,810 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:04,893 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:04,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:04,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:04,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:05,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:05,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:05,521 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:05,803 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:06,075 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:06,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:06,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:06,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2020-12-09 18:07:06,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521134848] [2020-12-09 18:07:06,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 18:07:06,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:06,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 18:07:06,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2020-12-09 18:07:06,373 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 21 states. [2020-12-09 18:07:06,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:06,596 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-12-09 18:07:06,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 18:07:06,596 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 16 [2020-12-09 18:07:06,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:06,597 INFO L225 Difference]: With dead ends: 31 [2020-12-09 18:07:06,597 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 18:07:06,598 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 18:07:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 18:07:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-09 18:07:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 18:07:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-09 18:07:06,600 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2020-12-09 18:07:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:06,600 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-09 18:07:06,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 18:07:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-09 18:07:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 18:07:06,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:06,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-09 18:07:06,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:06,803 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash -448860240, now seen corresponding path program 3 times [2020-12-09 18:07:06,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:06,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325404423] [2020-12-09 18:07:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:06,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325404423] [2020-12-09 18:07:06,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519840033] [2020-12-09 18:07:06,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:06,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 18:07:06,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:07:06,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 18:07:06,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:07,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:07,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151396503] [2020-12-09 18:07:07,166 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:07,166 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:07,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:07,166 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:07,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:07,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,399 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,548 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:07,952 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:08,228 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:08,506 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:08,814 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:08,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:08,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2020-12-09 18:07:08,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678985742] [2020-12-09 18:07:08,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-09 18:07:08,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-09 18:07:08,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2020-12-09 18:07:08,815 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 23 states. [2020-12-09 18:07:09,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:09,013 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-09 18:07:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 18:07:09,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2020-12-09 18:07:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:09,014 INFO L225 Difference]: With dead ends: 32 [2020-12-09 18:07:09,014 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 18:07:09,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 18:07:09,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 18:07:09,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-09 18:07:09,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 18:07:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-09 18:07:09,017 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2020-12-09 18:07:09,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:09,017 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-09 18:07:09,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-09 18:07:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-09 18:07:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 18:07:09,018 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:09,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-12-09 18:07:09,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:09,218 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:09,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:09,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1290934828, now seen corresponding path program 4 times [2020-12-09 18:07:09,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:09,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652558878] [2020-12-09 18:07:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652558878] [2020-12-09 18:07:09,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994189496] [2020-12-09 18:07:09,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 18:07:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:09,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:09,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271301950] [2020-12-09 18:07:09,700 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:09,701 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:09,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:09,701 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:09,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:09,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:09,905 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:09,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:09,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:09,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:09,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:10,029 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:10,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:10,444 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:10,718 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:11,021 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:11,287 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-09 18:07:11,396 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:11,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:11,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2020-12-09 18:07:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378792843] [2020-12-09 18:07:11,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-09 18:07:11,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-09 18:07:11,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 18:07:11,397 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 27 states. [2020-12-09 18:07:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:11,757 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-09 18:07:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 18:07:11,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 23 [2020-12-09 18:07:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:11,758 INFO L225 Difference]: With dead ends: 45 [2020-12-09 18:07:11,758 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 18:07:11,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=196, Invalid=1526, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 18:07:11,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 18:07:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-09 18:07:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 18:07:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-09 18:07:11,760 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2020-12-09 18:07:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:11,760 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-09 18:07:11,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-09 18:07:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-09 18:07:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-09 18:07:11,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:11,761 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2020-12-09 18:07:11,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:11,962 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:11,963 INFO L82 PathProgramCache]: Analyzing trace with hash 808197993, now seen corresponding path program 5 times [2020-12-09 18:07:11,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:11,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942211808] [2020-12-09 18:07:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:12,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942211808] [2020-12-09 18:07:12,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358869677] [2020-12-09 18:07:12,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:12,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 18:07:12,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:07:12,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 18:07:12,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:12,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:12,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:12,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423332472] [2020-12-09 18:07:12,412 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:12,412 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:12,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:12,413 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:12,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:12,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:12,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:12,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:12,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:12,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:12,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:12,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:12,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:13,186 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:13,492 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:13,794 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:14,073 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-09 18:07:14,186 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:14,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:14,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2020-12-09 18:07:14,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547812243] [2020-12-09 18:07:14,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-09 18:07:14,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:14,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-09 18:07:14,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 18:07:14,187 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 29 states. [2020-12-09 18:07:14,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:14,487 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-12-09 18:07:14,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 18:07:14,487 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 25 [2020-12-09 18:07:14,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:14,488 INFO L225 Difference]: With dead ends: 40 [2020-12-09 18:07:14,488 INFO L226 Difference]: Without dead ends: 40 [2020-12-09 18:07:14,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=284, Invalid=1438, Unknown=0, NotChecked=0, Total=1722 [2020-12-09 18:07:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-09 18:07:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-12-09 18:07:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 18:07:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-12-09 18:07:14,490 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2020-12-09 18:07:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:14,491 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-12-09 18:07:14,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-09 18:07:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-12-09 18:07:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-09 18:07:14,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:14,491 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2020-12-09 18:07:14,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:14,693 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1548312133, now seen corresponding path program 6 times [2020-12-09 18:07:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:14,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179563518] [2020-12-09 18:07:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179563518] [2020-12-09 18:07:14,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276656935] [2020-12-09 18:07:14,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:14,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 18:07:14,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:07:14,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-09 18:07:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:14,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:15,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487495527] [2020-12-09 18:07:15,087 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:15,087 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:15,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:15,087 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:15,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:15,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,432 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:15,847 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:16,152 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:16,446 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:16,832 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:16,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:16,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 21 [2020-12-09 18:07:16,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670473740] [2020-12-09 18:07:16,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-09 18:07:16,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-09 18:07:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-09 18:07:16,833 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 22 states. [2020-12-09 18:07:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:17,228 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-12-09 18:07:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 18:07:17,229 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-12-09 18:07:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:17,230 INFO L225 Difference]: With dead ends: 59 [2020-12-09 18:07:17,230 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 18:07:17,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 18:07:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 18:07:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-09 18:07:17,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 18:07:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-09 18:07:17,233 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-12-09 18:07:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:17,233 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-09 18:07:17,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-09 18:07:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-09 18:07:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-09 18:07:17,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:17,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2020-12-09 18:07:17,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2020-12-09 18:07:17,435 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1642423942, now seen corresponding path program 7 times [2020-12-09 18:07:17,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:17,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508373050] [2020-12-09 18:07:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:17,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508373050] [2020-12-09 18:07:17,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666147104] [2020-12-09 18:07:17,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 18:07:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:17,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:17,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55800973] [2020-12-09 18:07:17,812 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:17,812 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:17,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:17,813 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:17,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:17,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:18,097 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:18,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:18,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:18,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2020-12-09 18:07:18,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709238273] [2020-12-09 18:07:18,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 18:07:18,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:18,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 18:07:18,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2020-12-09 18:07:18,745 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 24 states. [2020-12-09 18:07:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:19,045 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2020-12-09 18:07:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 18:07:19,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-12-09 18:07:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:19,046 INFO L225 Difference]: With dead ends: 48 [2020-12-09 18:07:19,046 INFO L226 Difference]: Without dead ends: 48 [2020-12-09 18:07:19,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2020-12-09 18:07:19,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-09 18:07:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2020-12-09 18:07:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 18:07:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-12-09 18:07:19,048 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 32 [2020-12-09 18:07:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:19,049 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-12-09 18:07:19,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 18:07:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-12-09 18:07:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 18:07:19,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:19,049 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1] [2020-12-09 18:07:19,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2020-12-09 18:07:19,251 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash -147962690, now seen corresponding path program 8 times [2020-12-09 18:07:19,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:19,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151157465] [2020-12-09 18:07:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151157465] [2020-12-09 18:07:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512967346] [2020-12-09 18:07:19,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:19,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-09 18:07:19,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:07:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-09 18:07:19,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:19,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:19,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636977197] [2020-12-09 18:07:19,824 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:19,824 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:19,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:19,824 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:19,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:20,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,167 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:20,592 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:20,926 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:21,256 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:21,560 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-12-09 18:07:21,766 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:21,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:21,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2020-12-09 18:07:21,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776701818] [2020-12-09 18:07:21,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-09 18:07:21,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:21,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-09 18:07:21,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 18:07:21,767 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 28 states. [2020-12-09 18:07:22,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:22,352 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2020-12-09 18:07:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 18:07:22,352 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 37 [2020-12-09 18:07:22,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:22,353 INFO L225 Difference]: With dead ends: 73 [2020-12-09 18:07:22,353 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 18:07:22,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=213, Invalid=2139, Unknown=0, NotChecked=0, Total=2352 [2020-12-09 18:07:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 18:07:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-09 18:07:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 18:07:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-12-09 18:07:22,356 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 37 [2020-12-09 18:07:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:22,356 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-12-09 18:07:22,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-09 18:07:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-12-09 18:07:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 18:07:22,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:22,357 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1] [2020-12-09 18:07:22,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:22,559 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1328125331, now seen corresponding path program 9 times [2020-12-09 18:07:22,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:22,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56859414] [2020-12-09 18:07:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:22,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56859414] [2020-12-09 18:07:22,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396714333] [2020-12-09 18:07:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/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 [2020-12-09 18:07:22,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 18:07:22,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:07:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-09 18:07:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:22,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 25 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:23,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907666909] [2020-12-09 18:07:23,290 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:23,290 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:23,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:23,291 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:23,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:23,435 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:23,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:23,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:23,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:23,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:23,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:23,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:23,656 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:24,047 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:24,361 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:24,673 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:25,173 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:25,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:25,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2020-12-09 18:07:25,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494165117] [2020-12-09 18:07:25,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-09 18:07:25,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:25,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-09 18:07:25,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1920, Unknown=0, NotChecked=0, Total=2162 [2020-12-09 18:07:25,175 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 41 states. [2020-12-09 18:07:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:25,623 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-09 18:07:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 18:07:25,623 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 39 [2020-12-09 18:07:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:25,624 INFO L225 Difference]: With dead ends: 56 [2020-12-09 18:07:25,624 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 18:07:25,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=468, Invalid=2612, Unknown=0, NotChecked=0, Total=3080 [2020-12-09 18:07:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 18:07:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-12-09 18:07:25,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 18:07:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-12-09 18:07:25,627 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 39 [2020-12-09 18:07:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:25,627 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-12-09 18:07:25,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-09 18:07:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-12-09 18:07:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-09 18:07:25,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:25,628 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1] [2020-12-09 18:07:25,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:25,828 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash -27363887, now seen corresponding path program 10 times [2020-12-09 18:07:25,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:25,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548135641] [2020-12-09 18:07:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 67 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:26,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548135641] [2020-12-09 18:07:26,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767362421] [2020-12-09 18:07:26,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/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 [2020-12-09 18:07:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:26,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-09 18:07:26,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:26,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:26,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915952332] [2020-12-09 18:07:26,876 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:26,876 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:26,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:26,876 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:26,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:27,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:27,637 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:28,010 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:28,361 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:28,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:28,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:28,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2020-12-09 18:07:28,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420483287] [2020-12-09 18:07:28,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-09 18:07:28,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-09 18:07:28,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1836, Unknown=0, NotChecked=0, Total=1980 [2020-12-09 18:07:28,971 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 39 states. [2020-12-09 18:07:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:30,019 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-12-09 18:07:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-09 18:07:30,019 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 44 [2020-12-09 18:07:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:30,020 INFO L225 Difference]: With dead ends: 87 [2020-12-09 18:07:30,020 INFO L226 Difference]: Without dead ends: 54 [2020-12-09 18:07:30,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 93 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=366, Invalid=3666, Unknown=0, NotChecked=0, Total=4032 [2020-12-09 18:07:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-09 18:07:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-09 18:07:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-09 18:07:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-12-09 18:07:30,023 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 44 [2020-12-09 18:07:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:30,023 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-12-09 18:07:30,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-09 18:07:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-12-09 18:07:30,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-09 18:07:30,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:07:30,024 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2020-12-09 18:07:30,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1258 [2020-12-09 18:07:30,225 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-09 18:07:30,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:07:30,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1838974116, now seen corresponding path program 11 times [2020-12-09 18:07:30,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:07:30,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381574198] [2020-12-09 18:07:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:07:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:07:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:07:30,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381574198] [2020-12-09 18:07:30,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273778138] [2020-12-09 18:07:30,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/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 [2020-12-09 18:07:30,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-09 18:07:30,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:07:30,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-09 18:07:30,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:07:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-09 18:07:30,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:07:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-09 18:07:30,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905522304] [2020-12-09 18:07:30,975 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 18:07:30,975 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:07:30,975 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:07:30,975 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:07:30,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:07:31,131 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 18:07:31,765 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:07:32,080 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-12-09 18:07:32,424 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-09 18:07:32,934 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:07:32,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:07:32,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6, 6] total 27 [2020-12-09 18:07:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830734498] [2020-12-09 18:07:32,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-09 18:07:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:07:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-09 18:07:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 18:07:32,935 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 29 states. [2020-12-09 18:07:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:07:34,017 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-12-09 18:07:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-09 18:07:34,018 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-12-09 18:07:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:07:34,018 INFO L225 Difference]: With dead ends: 64 [2020-12-09 18:07:34,018 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 18:07:34,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=783, Invalid=3249, Unknown=0, NotChecked=0, Total=4032 [2020-12-09 18:07:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 18:07:34,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 18:07:34,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 18:07:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 18:07:34,019 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-12-09 18:07:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:07:34,019 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 18:07:34,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-09 18:07:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 18:07:34,020 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 18:07:34,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1403,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:07:34,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:07:34 BoogieIcfgContainer [2020-12-09 18:07:34,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:07:34,228 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:07:34,228 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:07:34,228 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:07:34,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:06:59" (3/4) ... [2020-12-09 18:07:34,230 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 18:07:34,237 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2020-12-09 18:07:34,237 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-09 18:07:34,238 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 18:07:34,261 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b509e72c-e27d-4311-b1ac-0353f72651ca/bin/utaipan/witness.graphml [2020-12-09 18:07:34,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:07:34,261 INFO L168 Benchmark]: Toolchain (without parser) took 35471.98 ms. Allocated memory was 90.2 MB in the beginning and 192.9 MB in the end (delta: 102.8 MB). Free memory was 61.2 MB in the beginning and 109.7 MB in the end (delta: -48.5 MB). Peak memory consumption was 53.7 MB. Max. memory is 16.1 GB. [2020-12-09 18:07:34,261 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 90.2 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:07:34,262 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.14 ms. Allocated memory is still 90.2 MB. Free memory was 61.0 MB in the beginning and 54.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 18:07:34,262 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 90.2 MB. Free memory was 54.1 MB in the beginning and 52.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:07:34,262 INFO L168 Benchmark]: Boogie Preprocessor took 17.77 ms. Allocated memory is still 90.2 MB. Free memory was 52.1 MB in the beginning and 51.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:07:34,262 INFO L168 Benchmark]: RCFGBuilder took 340.38 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.0 MB in the beginning and 70.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2020-12-09 18:07:34,262 INFO L168 Benchmark]: TraceAbstraction took 34742.60 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 70.1 MB in the beginning and 112.6 MB in the end (delta: -42.5 MB). Peak memory consumption was 42.0 MB. Max. memory is 16.1 GB. [2020-12-09 18:07:34,262 INFO L168 Benchmark]: Witness Printer took 33.08 ms. Allocated memory is still 192.9 MB. Free memory was 112.6 MB in the beginning and 109.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:07:34,264 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 90.2 MB. Free memory was 48.7 MB in the beginning and 48.7 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 305.14 ms. Allocated memory is still 90.2 MB. Free memory was 61.0 MB in the beginning and 54.1 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 90.2 MB. Free memory was 54.1 MB in the beginning and 52.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.77 ms. Allocated memory is still 90.2 MB. Free memory was 52.1 MB in the beginning and 51.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 340.38 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 51.0 MB in the beginning and 70.6 MB in the end (delta: -19.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34742.60 ms. Allocated memory was 109.1 MB in the beginning and 192.9 MB in the end (delta: 83.9 MB). Free memory was 70.1 MB in the beginning and 112.6 MB in the end (delta: -42.5 MB). Peak memory consumption was 42.0 MB. Max. memory is 16.1 GB. * Witness Printer took 33.08 ms. Allocated memory is still 192.9 MB. Free memory was 112.6 MB in the beginning and 109.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 526]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 538]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 34.6s, OverallIterations: 19, TraceHistogramMax: 6, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 229 SDtfs, 2453 SDslu, 1402 SDs, 0 SdLazy, 3676 SolverSat, 737 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1236 GetRequests, 671 SyntacticMatches, 62 SemanticMatches, 503 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 5315 ImplicationChecksByTransitivity, 18.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 76 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 685 NumberOfCodeBlocks, 685 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 968 ConstructedInterpolants, 92 QuantifiedInterpolants, 350055 SizeOfPredicates, 140 NumberOfNonLiveVariables, 1775 ConjunctsInSsa, 397 ConjunctsInUnsatCore, 43 InterpolantComputations, 7 PerfectInterpolantSequences, 542/1618 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...