./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 76e89a58b9c6f7059fcf416ee7a1666558a3d440 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:35:40,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:35:40,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:35:40,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:35:40,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:35:40,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:35:40,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:35:40,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:35:40,829 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:35:40,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:35:40,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:35:40,833 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:35:40,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:35:40,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:35:40,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:35:40,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:35:40,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:35:40,844 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:35:40,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:35:40,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:35:40,859 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:35:40,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:35:40,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:35:40,865 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:35:40,867 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:35:40,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:35:40,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:35:40,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:35:40,877 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:35:40,878 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:35:40,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:35:40,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:35:40,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:35:40,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:35:40,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:35:40,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:35:40,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:35:40,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:35:40,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:35:40,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:35:40,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:35:40,885 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2020-11-28 07:35:40,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:35:40,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:35:40,914 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:35:40,915 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:35:40,915 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:35:40,915 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:35:40,916 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:35:40,916 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:35:40,916 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:35:40,916 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:35:40,917 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:35:40,917 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:35:40,918 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:35:40,918 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:35:40,918 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:35:40,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:35:40,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:35:40,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:35:40,920 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:35:40,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:35:40,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:35:40,920 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:35:40,920 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:35:40,921 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:35:40,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:35:40,921 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:35:40,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:35:40,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:35:40,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:35:40,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:35:40,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:35:40,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:35:40,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:35:40,925 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:35:40,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:35:40,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:35:40,925 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:35:40,926 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_0a95b631-4740-494b-937e-a2ebb3219cb5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76e89a58b9c6f7059fcf416ee7a1666558a3d440 [2020-11-28 07:35:41,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:35:41,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:35:41,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:35:41,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:35:41,235 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:35:41,236 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-11-28 07:35:41,307 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/data/d0721191c/798c4c9d69f14847b91d43f8d604a111/FLAGbea0181cf [2020-11-28 07:35:41,776 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:35:41,777 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/sv-benchmarks/c/termination-crafted/NonTermination3-1.c [2020-11-28 07:35:41,787 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/data/d0721191c/798c4c9d69f14847b91d43f8d604a111/FLAGbea0181cf [2020-11-28 07:35:42,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/data/d0721191c/798c4c9d69f14847b91d43f8d604a111 [2020-11-28 07:35:42,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:35:42,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:35:42,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:42,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:35:42,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:35:42,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24047b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42, skipping insertion in model container [2020-11-28 07:35:42,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:35:42,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:35:42,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:42,369 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:35:42,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:42,431 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:35:42,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42 WrapperNode [2020-11-28 07:35:42,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:42,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:42,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:35:42,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:35:42,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,452 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,472 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:42,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:35:42,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:35:42,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:35:42,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... [2020-11-28 07:35:42,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:35:42,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:35:42,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:35:42,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:35:42,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:35:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:35:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:35:42,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:35:42,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:35:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:35:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:35:43,003 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:35:43,004 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 07:35:43,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:43 BoogieIcfgContainer [2020-11-28 07:35:43,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:35:43,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:35:43,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:35:43,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:35:43,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:35:42" (1/3) ... [2020-11-28 07:35:43,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31592c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:43, skipping insertion in model container [2020-11-28 07:35:43,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:42" (2/3) ... [2020-11-28 07:35:43,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31592c50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:43, skipping insertion in model container [2020-11-28 07:35:43,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:43" (3/3) ... [2020-11-28 07:35:43,027 INFO L111 eAbstractionObserver]: Analyzing ICFG NonTermination3-1.c [2020-11-28 07:35:43,045 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:35:43,049 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-11-28 07:35:43,066 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-11-28 07:35:43,111 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:35:43,113 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:35:43,113 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:35:43,114 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:35:43,114 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:35:43,114 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:35:43,114 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:35:43,114 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:35:43,127 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-28 07:35:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:35:43,133 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:43,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:35:43,134 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash 79124, now seen corresponding path program 1 times [2020-11-28 07:35:43,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:43,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184987593] [2020-11-28 07:35:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:43,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184987593] [2020-11-28 07:35:43,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:43,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:35:43,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793446356] [2020-11-28 07:35:43,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:43,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:43,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:43,319 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2020-11-28 07:35:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:43,408 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2020-11-28 07:35:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:43,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:35:43,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:43,421 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:35:43,422 INFO L226 Difference]: Without dead ends: 14 [2020-11-28 07:35:43,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-28 07:35:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-28 07:35:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 07:35:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-28 07:35:43,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 3 [2020-11-28 07:35:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:43,465 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-28 07:35:43,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-28 07:35:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:35:43,466 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:43,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:35:43,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:35:43,467 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:43,471 INFO L82 PathProgramCache]: Analyzing trace with hash 79125, now seen corresponding path program 1 times [2020-11-28 07:35:43,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:43,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842661996] [2020-11-28 07:35:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:43,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842661996] [2020-11-28 07:35:43,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:43,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:35:43,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663989540] [2020-11-28 07:35:43,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:43,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:43,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:43,524 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-11-28 07:35:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:43,560 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-11-28 07:35:43,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:43,560 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:35:43,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:43,561 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:35:43,561 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 07:35:43,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 07:35:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 07:35:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 07:35:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-28 07:35:43,565 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 3 [2020-11-28 07:35:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:43,566 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-28 07:35:43,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-28 07:35:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:35:43,566 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:43,566 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-28 07:35:43,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:35:43,567 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:43,567 INFO L82 PathProgramCache]: Analyzing trace with hash 76077888, now seen corresponding path program 1 times [2020-11-28 07:35:43,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:43,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679294262] [2020-11-28 07:35:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:43,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679294262] [2020-11-28 07:35:43,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796366758] [2020-11-28 07:35:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:43,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:35:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:43,795 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 07:35:43,796 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:35:43,810 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:35:43,811 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:35:43,811 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 07:35:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:43,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:43,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808021581] [2020-11-28 07:35:43,927 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-28 07:35:43,927 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:43,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:43,938 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:43,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:44,554 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:44,876 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-11-28 07:35:44,969 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:44,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:35:44,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:35:44,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070730484] [2020-11-28 07:35:44,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:35:44,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:44,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:35:44,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:35:44,971 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-11-28 07:35:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:45,102 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-11-28 07:35:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:35:45,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-11-28 07:35:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:45,104 INFO L225 Difference]: With dead ends: 38 [2020-11-28 07:35:45,104 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 07:35:45,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:35:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 07:35:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2020-11-28 07:35:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:35:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 07:35:45,109 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2020-11-28 07:35:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:45,109 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 07:35:45,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:35:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 07:35:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 07:35:45,110 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:45,110 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-11-28 07:35:45,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 07:35:45,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:45,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1804189333, now seen corresponding path program 1 times [2020-11-28 07:35:45,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:45,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610114790] [2020-11-28 07:35:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 07:35:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610114790] [2020-11-28 07:35:45,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:45,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:35:45,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272219740] [2020-11-28 07:35:45,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:35:45,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:45,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:35:45,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:35:45,418 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-11-28 07:35:45,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:45,505 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-11-28 07:35:45,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:35:45,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-11-28 07:35:45,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:45,507 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:35:45,507 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:35:45,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:35:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:35:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-11-28 07:35:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:35:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-11-28 07:35:45,511 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 9 [2020-11-28 07:35:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:45,511 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-11-28 07:35:45,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:35:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-11-28 07:35:45,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:35:45,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:45,513 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:45,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-28 07:35:45,513 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash -95288389, now seen corresponding path program 1 times [2020-11-28 07:35:45,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:45,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722348770] [2020-11-28 07:35:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 07:35:45,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722348770] [2020-11-28 07:35:45,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:45,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:35:45,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630013730] [2020-11-28 07:35:45,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:45,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:45,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:45,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:45,540 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2020-11-28 07:35:45,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:45,555 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-11-28 07:35:45,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:45,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-11-28 07:35:45,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:45,558 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:35:45,558 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:35:45,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:35:45,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 07:35:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:35:45,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 07:35:45,562 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 10 [2020-11-28 07:35:45,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:45,563 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 07:35:45,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:45,563 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 07:35:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:35:45,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:45,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:45,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-28 07:35:45,564 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1341025486, now seen corresponding path program 1 times [2020-11-28 07:35:45,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:45,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981084586] [2020-11-28 07:35:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:45,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981084586] [2020-11-28 07:35:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355263388] [2020-11-28 07:35:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:35:45,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:45,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:45,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503566792] [2020-11-28 07:35:45,740 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:35:45,740 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:45,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:45,741 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:45,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:46,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:35:46,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-28 07:35:46,261 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:46,557 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-11-28 07:35:46,841 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-11-28 07:35:47,050 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-11-28 07:35:47,261 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-11-28 07:35:47,449 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2020-11-28 07:35:47,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:47,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:35:47,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2020-11-28 07:35:47,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576850573] [2020-11-28 07:35:47,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 07:35:47,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:47,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 07:35:47,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:35:47,529 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 9 states. [2020-11-28 07:35:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:47,567 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-11-28 07:35:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:35:47,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-11-28 07:35:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:47,568 INFO L225 Difference]: With dead ends: 26 [2020-11-28 07:35:47,568 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 07:35:47,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:35:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 07:35:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-11-28 07:35:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 07:35:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-28 07:35:47,572 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 11 [2020-11-28 07:35:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:47,572 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-28 07:35:47,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 07:35:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-11-28 07:35:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:35:47,573 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:47,573 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-11-28 07:35:47,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-28 07:35:47,782 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:47,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:47,782 INFO L82 PathProgramCache]: Analyzing trace with hash 79779137, now seen corresponding path program 2 times [2020-11-28 07:35:47,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:47,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724754546] [2020-11-28 07:35:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:47,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724754546] [2020-11-28 07:35:47,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795501271] [2020-11-28 07:35:47,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:47,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 07:35:47,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:35:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:35:47,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 07:35:48,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 07:35:48,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-28 07:35:48,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 12 [2020-11-28 07:35:48,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151062915] [2020-11-28 07:35:48,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:35:48,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:48,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:35:48,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:35:48,170 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-11-28 07:35:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:48,204 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-28 07:35:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:35:48,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 07:35:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:48,205 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:35:48,205 INFO L226 Difference]: Without dead ends: 24 [2020-11-28 07:35:48,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:35:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-28 07:35:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-28 07:35:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:35:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-28 07:35:48,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2020-11-28 07:35:48,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:48,208 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-28 07:35:48,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:35:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-28 07:35:48,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:35:48,209 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:48,209 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:48,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:48,422 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:48,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:48,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1638817542, now seen corresponding path program 2 times [2020-11-28 07:35:48,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:48,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742240661] [2020-11-28 07:35:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:48,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742240661] [2020-11-28 07:35:48,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552881578] [2020-11-28 07:35:48,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:48,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:35:48,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:35:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:35:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 07:35:48,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:48,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 07:35:48,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:35:48,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2020-11-28 07:35:48,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318150845] [2020-11-28 07:35:48,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:35:48,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:48,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:35:48,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:35:48,677 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-11-28 07:35:48,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:48,707 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-11-28 07:35:48,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:35:48,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-28 07:35:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:48,708 INFO L225 Difference]: With dead ends: 23 [2020-11-28 07:35:48,708 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 07:35:48,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-11-28 07:35:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 07:35:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-28 07:35:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 07:35:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-28 07:35:48,711 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2020-11-28 07:35:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:48,711 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-28 07:35:48,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:35:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-28 07:35:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:35:48,712 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:48,712 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:48,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:48,926 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:48,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1638983057, now seen corresponding path program 1 times [2020-11-28 07:35:48,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:48,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408983138] [2020-11-28 07:35:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:49,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408983138] [2020-11-28 07:35:49,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029354684] [2020-11-28 07:35:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:35:49,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:49,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002394521] [2020-11-28 07:35:49,193 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-28 07:35:49,194 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:49,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:49,194 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:49,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:49,512 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:49,782 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-11-28 07:35:50,012 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-11-28 07:35:50,163 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-11-28 07:35:50,497 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-11-28 07:35:50,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:50,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:35:50,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2020-11-28 07:35:50,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367649099] [2020-11-28 07:35:50,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-28 07:35:50,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:50,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-28 07:35:50,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-28 07:35:50,627 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2020-11-28 07:35:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:50,709 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-28 07:35:50,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:35:50,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2020-11-28 07:35:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:50,711 INFO L225 Difference]: With dead ends: 28 [2020-11-28 07:35:50,711 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 07:35:50,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-11-28 07:35:50,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 07:35:50,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-28 07:35:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 07:35:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-11-28 07:35:50,715 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2020-11-28 07:35:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:50,715 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-11-28 07:35:50,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-28 07:35:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-11-28 07:35:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 07:35:50,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:50,716 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:50,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-28 07:35:50,926 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-28 07:35:50,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1006723739, now seen corresponding path program 2 times [2020-11-28 07:35:50,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:50,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662700236] [2020-11-28 07:35:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:35:51,004 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:35:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:35:51,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:35:51,103 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:35:51,103 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:35:51,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-11-28 07:35:51,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:35:51 BoogieIcfgContainer [2020-11-28 07:35:51,158 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:35:51,158 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:35:51,158 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:35:51,159 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:35:51,159 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:43" (3/4) ... [2020-11-28 07:35:51,161 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:35:51,225 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0a95b631-4740-494b-937e-a2ebb3219cb5/bin/utaipan/witness.graphml [2020-11-28 07:35:51,226 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:35:51,227 INFO L168 Benchmark]: Toolchain (without parser) took 9068.51 ms. Allocated memory was 86.0 MB in the beginning and 180.4 MB in the end (delta: 94.4 MB). Free memory was 50.5 MB in the beginning and 128.5 MB in the end (delta: -77.9 MB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:51,227 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:35:51,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.61 ms. Allocated memory is still 86.0 MB. Free memory was 50.3 MB in the beginning and 64.6 MB in the end (delta: -14.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:51,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.01 ms. Allocated memory is still 86.0 MB. Free memory was 64.6 MB in the beginning and 63.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:35:51,229 INFO L168 Benchmark]: Boogie Preprocessor took 41.89 ms. Allocated memory is still 86.0 MB. Free memory was 63.1 MB in the beginning and 62.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:51,229 INFO L168 Benchmark]: RCFGBuilder took 488.56 ms. Allocated memory is still 86.0 MB. Free memory was 62.0 MB in the beginning and 46.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:51,234 INFO L168 Benchmark]: TraceAbstraction took 8150.25 ms. Allocated memory was 86.0 MB in the beginning and 180.4 MB in the end (delta: 94.4 MB). Free memory was 45.8 MB in the beginning and 130.6 MB in the end (delta: -84.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:51,235 INFO L168 Benchmark]: Witness Printer took 67.63 ms. Allocated memory is still 180.4 MB. Free memory was 130.6 MB in the beginning and 128.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:51,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 270.61 ms. Allocated memory is still 86.0 MB. Free memory was 50.3 MB in the beginning and 64.6 MB in the end (delta: -14.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.01 ms. Allocated memory is still 86.0 MB. Free memory was 64.6 MB in the beginning and 63.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.89 ms. Allocated memory is still 86.0 MB. Free memory was 63.1 MB in the beginning and 62.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 488.56 ms. Allocated memory is still 86.0 MB. Free memory was 62.0 MB in the beginning and 46.2 MB in the end (delta: 15.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8150.25 ms. Allocated memory was 86.0 MB in the beginning and 180.4 MB in the end (delta: 94.4 MB). Free memory was 45.8 MB in the beginning and 130.6 MB in the end (delta: -84.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Witness Printer took 67.63 ms. Allocated memory is still 180.4 MB. Free memory was 130.6 MB in the beginning and 128.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 20]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int i = __VERIFIER_nondet_int(); [L11] int a[10]; [L13] int n = 0; [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND TRUE n < 10 [L14] a[n] = __VERIFIER_nondet_int() [L13] ++n [L13] COND FALSE !(n < 10) [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] EXPR a[i] [L17] 0 <= i && i < 10 && a[i] >= 0 [L17] COND TRUE 0 <= i && i < 10 && a[i] >= 0 [L18] i = __VERIFIER_nondet_int() [L20] a[i] = 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 103 SDslu, 95 SDs, 0 SdLazy, 177 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=9, 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, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 182 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 201 ConstructedInterpolants, 1 QuantifiedInterpolants, 17012 SizeOfPredicates, 3 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 32 ConjunctsInUnsatCore, 19 InterpolantComputations, 7 PerfectInterpolantSequences, 124/302 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 incorrect! Received shutdown request...