./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/realloc1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/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 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2020-11-22 13:01:03,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:01:03,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:01:03,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:01:03,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:01:03,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:01:03,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:01:03,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:01:03,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:01:03,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:01:03,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:01:03,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:01:03,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:01:03,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:01:03,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:01:03,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:01:03,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:01:03,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:01:03,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:01:03,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:01:03,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:01:03,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:01:03,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:01:03,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:01:03,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:01:03,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:01:03,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:01:03,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:01:03,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:01:03,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:01:03,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:01:03,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:01:03,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:01:03,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:01:03,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:01:03,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:01:03,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:01:03,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:01:03,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:01:03,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:01:03,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:01:03,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-22 13:01:03,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:01:03,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:01:03,636 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:01:03,636 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:01:03,637 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:01:03,637 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:01:03,637 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:01:03,637 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:01:03,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:01:03,638 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:01:03,639 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:01:03,639 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:01:03,639 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:01:03,639 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:01:03,640 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:01:03,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-22 13:01:03,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-22 13:01:03,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:01:03,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:01:03,642 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:01:03,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:01:03,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:01:03,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:01:03,643 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-22 13:01:03,643 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-22 13:01:03,644 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-22 13:01:03,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:01:03,646 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:01:03,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:01:03,646 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:01:03,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:01:03,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:01:03,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:01:03,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:01:03,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:01:03,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:01:03,648 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:01:03,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:01:03,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:01:03,648 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:01:03,649 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_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2020-11-22 13:01:03,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:01:03,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:01:03,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:01:03,988 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:01:03,988 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:01:03,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-11-22 13:01:04,073 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/data/c9dcbf9b1/50e0bf7b56c443d3bf3bb030a12c97c8/FLAGa0b3e9f40 [2020-11-22 13:01:04,524 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:01:04,525 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-11-22 13:01:04,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/data/c9dcbf9b1/50e0bf7b56c443d3bf3bb030a12c97c8/FLAGa0b3e9f40 [2020-11-22 13:01:04,939 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/data/c9dcbf9b1/50e0bf7b56c443d3bf3bb030a12c97c8 [2020-11-22 13:01:04,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:01:04,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:01:04,944 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:04,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:01:04,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:01:04,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:04" (1/1) ... [2020-11-22 13:01:04,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@85cbf6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:04, skipping insertion in model container [2020-11-22 13:01:04,956 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:01:04" (1/1) ... [2020-11-22 13:01:04,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:01:04,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:01:05,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:05,130 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:01:05,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:01:05,162 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:01:05,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05 WrapperNode [2020-11-22 13:01:05,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:01:05,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:05,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:01:05,165 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:01:05,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:01:05,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:01:05,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:01:05,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:01:05,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... [2020-11-22 13:01:05,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:01:05,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:01:05,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:01:05,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:01:05,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/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 [2020-11-22 13:01:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:01:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:01:05,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:01:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:01:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:01:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:01:05,810 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:01:05,811 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-22 13:01:05,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:05 BoogieIcfgContainer [2020-11-22 13:01:05,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:01:05,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:01:05,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:01:05,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:01:05,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:01:04" (1/3) ... [2020-11-22 13:01:05,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82e61d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:05, skipping insertion in model container [2020-11-22 13:01:05,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:01:05" (2/3) ... [2020-11-22 13:01:05,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82e61d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:01:05, skipping insertion in model container [2020-11-22 13:01:05,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:05" (3/3) ... [2020-11-22 13:01:05,822 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2020-11-22 13:01:05,833 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:01:05,836 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-22 13:01:05,847 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-22 13:01:05,867 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:01:05,867 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-22 13:01:05,867 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:01:05,867 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:01:05,867 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:01:05,867 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:01:05,868 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:01:05,868 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:01:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-22 13:01:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:01:05,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:05,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:01:05,891 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash 76559, now seen corresponding path program 1 times [2020-11-22 13:01:05,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:05,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937980103] [2020-11-22 13:01:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:06,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937980103] [2020-11-22 13:01:06,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:06,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-22 13:01:06,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639374678] [2020-11-22 13:01:06,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:01:06,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:06,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:01:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:06,065 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-11-22 13:01:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:06,107 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-11-22 13:01:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:01:06,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:01:06,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:06,118 INFO L225 Difference]: With dead ends: 21 [2020-11-22 13:01:06,124 INFO L226 Difference]: Without dead ends: 20 [2020-11-22 13:01:06,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:06,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-22 13:01:06,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-11-22 13:01:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-22 13:01:06,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-22 13:01:06,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 3 [2020-11-22 13:01:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:06,175 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-22 13:01:06,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:01:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-22 13:01:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:01:06,176 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:06,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:01:06,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:01:06,177 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:06,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:06,179 INFO L82 PathProgramCache]: Analyzing trace with hash 75280, now seen corresponding path program 1 times [2020-11-22 13:01:06,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:06,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550218881] [2020-11-22 13:01:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:06,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550218881] [2020-11-22 13:01:06,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:06,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:01:06,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335185281] [2020-11-22 13:01:06,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:01:06,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:06,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:01:06,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:06,239 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2020-11-22 13:01:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:06,264 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-22 13:01:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:01:06,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:01:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:06,265 INFO L225 Difference]: With dead ends: 15 [2020-11-22 13:01:06,265 INFO L226 Difference]: Without dead ends: 15 [2020-11-22 13:01:06,266 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 [2020-11-22 13:01:06,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-22 13:01:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-22 13:01:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:01:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-22 13:01:06,269 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2020-11-22 13:01:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:06,269 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-22 13:01:06,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:01:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-22 13:01:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 13:01:06,270 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:06,270 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 13:01:06,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:01:06,270 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash 75281, now seen corresponding path program 1 times [2020-11-22 13:01:06,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:06,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302915671] [2020-11-22 13:01:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:06,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302915671] [2020-11-22 13:01:06,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:06,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:01:06,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328266009] [2020-11-22 13:01:06,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:01:06,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:06,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:01:06,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:06,341 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2020-11-22 13:01:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:06,372 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-22 13:01:06,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:01:06,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-22 13:01:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:06,373 INFO L225 Difference]: With dead ends: 16 [2020-11-22 13:01:06,373 INFO L226 Difference]: Without dead ends: 16 [2020-11-22 13:01:06,374 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 [2020-11-22 13:01:06,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-22 13:01:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-22 13:01:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-22 13:01:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-22 13:01:06,377 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2020-11-22 13:01:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:06,377 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-22 13:01:06,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:01:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-22 13:01:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:01:06,378 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:06,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:01:06,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:01:06,378 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:06,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:06,379 INFO L82 PathProgramCache]: Analyzing trace with hash 72381238, now seen corresponding path program 1 times [2020-11-22 13:01:06,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:06,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542284133] [2020-11-22 13:01:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:01:06,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542284133] [2020-11-22 13:01:06,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:06,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 13:01:06,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721603430] [2020-11-22 13:01:06,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:01:06,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:01:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:01:06,434 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-11-22 13:01:06,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:06,465 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-22 13:01:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:01:06,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-22 13:01:06,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:06,467 INFO L225 Difference]: With dead ends: 15 [2020-11-22 13:01:06,467 INFO L226 Difference]: Without dead ends: 15 [2020-11-22 13:01:06,467 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 [2020-11-22 13:01:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-22 13:01:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-22 13:01:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-22 13:01:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-22 13:01:06,470 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2020-11-22 13:01:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:06,470 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-22 13:01:06,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:01:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-22 13:01:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:01:06,471 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:06,471 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-22 13:01:06,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-22 13:01:06,472 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:06,475 INFO L82 PathProgramCache]: Analyzing trace with hash 72379960, now seen corresponding path program 1 times [2020-11-22 13:01:06,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:06,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226825769] [2020-11-22 13:01:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:06,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226825769] [2020-11-22 13:01:06,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407798232] [2020-11-22 13:01:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/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 [2020-11-22 13:01:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:06,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-22 13:01:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:06,670 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 [2020-11-22 13:01:06,671 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-22 13:01:06,679 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-22 13:01:06,680 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-22 13:01:06,680 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-22 13:01:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:06,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:06,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [140874825] [2020-11-22 13:01:06,757 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-22 13:01:06,757 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:06,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:06,769 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:06,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:07,246 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:07,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:07,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:07,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-22 13:01:07,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737110614] [2020-11-22 13:01:07,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-22 13:01:07,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:07,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-22 13:01:07,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-22 13:01:07,470 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-11-22 13:01:07,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:07,601 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-11-22 13:01:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-22 13:01:07,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-11-22 13:01:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:07,603 INFO L225 Difference]: With dead ends: 35 [2020-11-22 13:01:07,603 INFO L226 Difference]: Without dead ends: 35 [2020-11-22 13:01:07,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:01:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-22 13:01:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-11-22 13:01:07,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 13:01:07,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-22 13:01:07,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 5 [2020-11-22 13:01:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:07,607 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-22 13:01:07,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-22 13:01:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-22 13:01:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:01:07,611 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:07,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-22 13:01:07,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:07,812 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:07,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:07,813 INFO L82 PathProgramCache]: Analyzing trace with hash 198927928, now seen corresponding path program 1 times [2020-11-22 13:01:07,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:07,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555264200] [2020-11-22 13:01:07,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555264200] [2020-11-22 13:01:07,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398786748] [2020-11-22 13:01:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-22 13:01:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-22 13:01:07,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:07,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:07,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569111355] [2020-11-22 13:01:07,946 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-22 13:01:07,946 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:07,947 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:07,947 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:07,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:08,193 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:08,442 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:08,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:08,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-11-22 13:01:08,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766950046] [2020-11-22 13:01:08,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:01:08,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:08,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:01:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:01:08,445 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-11-22 13:01:08,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:08,511 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-11-22 13:01:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:01:08,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-22 13:01:08,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:08,515 INFO L225 Difference]: With dead ends: 25 [2020-11-22 13:01:08,515 INFO L226 Difference]: Without dead ends: 25 [2020-11-22 13:01:08,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-22 13:01:08,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-22 13:01:08,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-22 13:01:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-22 13:01:08,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-22 13:01:08,519 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2020-11-22 13:01:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:08,519 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-22 13:01:08,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:01:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-22 13:01:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-22 13:01:08,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:08,520 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-11-22 13:01:08,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-22 13:01:08,721 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1941212115, now seen corresponding path program 2 times [2020-11-22 13:01:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:08,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054443076] [2020-11-22 13:01:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:08,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054443076] [2020-11-22 13:01:08,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:01:08,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-22 13:01:08,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144414000] [2020-11-22 13:01:08,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-22 13:01:08,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-22 13:01:08,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:01:08,853 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-11-22 13:01:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:08,918 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-22 13:01:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-22 13:01:08,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-22 13:01:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:08,919 INFO L225 Difference]: With dead ends: 22 [2020-11-22 13:01:08,919 INFO L226 Difference]: Without dead ends: 22 [2020-11-22 13:01:08,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-22 13:01:08,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-22 13:01:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-22 13:01:08,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-22 13:01:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-11-22 13:01:08,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 11 [2020-11-22 13:01:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:08,923 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-11-22 13:01:08,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-22 13:01:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-11-22 13:01:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-22 13:01:08,924 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:08,924 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-11-22 13:01:08,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-22 13:01:08,924 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -409368164, now seen corresponding path program 2 times [2020-11-22 13:01:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:08,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452714977] [2020-11-22 13:01:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:09,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452714977] [2020-11-22 13:01:09,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585170599] [2020-11-22 13:01:09,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/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 [2020-11-22 13:01:09,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-22 13:01:09,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-22 13:01:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-22 13:01:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-22 13:01:09,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-22 13:01:09,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-22 13:01:09,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [8] total 9 [2020-11-22 13:01:09,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597657565] [2020-11-22 13:01:09,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:01:09,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:09,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:01:09,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:01:09,111 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 3 states. [2020-11-22 13:01:09,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:09,130 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-11-22 13:01:09,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:01:09,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-22 13:01:09,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:09,131 INFO L225 Difference]: With dead ends: 21 [2020-11-22 13:01:09,131 INFO L226 Difference]: Without dead ends: 21 [2020-11-22 13:01:09,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-22 13:01:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-22 13:01:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-22 13:01:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-22 13:01:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-11-22 13:01:09,134 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-11-22 13:01:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:09,135 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-11-22 13:01:09,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:01:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-11-22 13:01:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-22 13:01:09,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:09,136 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:09,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-22 13:01:09,348 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:09,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1734187391, now seen corresponding path program 1 times [2020-11-22 13:01:09,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:09,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904467257] [2020-11-22 13:01:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:09,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904467257] [2020-11-22 13:01:09,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358685695] [2020-11-22 13:01:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/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 [2020-11-22 13:01:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:01:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-22 13:01:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-22 13:01:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:09,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-22 13:01:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:01:09,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779810073] [2020-11-22 13:01:09,588 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-22 13:01:09,588 INFO L166 IcfgInterpreter]: Building call graph [2020-11-22 13:01:09,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-22 13:01:09,588 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-22 13:01:09,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-22 13:01:09,834 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-22 13:01:10,203 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-22 13:01:10,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-22 13:01:10,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2020-11-22 13:01:10,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201402419] [2020-11-22 13:01:10,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-22 13:01:10,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:01:10,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-22 13:01:10,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:01:10,205 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-11-22 13:01:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:01:10,262 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-22 13:01:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-22 13:01:10,262 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-22 13:01:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:01:10,263 INFO L225 Difference]: With dead ends: 29 [2020-11-22 13:01:10,263 INFO L226 Difference]: Without dead ends: 29 [2020-11-22 13:01:10,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-22 13:01:10,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-22 13:01:10,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-22 13:01:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-22 13:01:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-11-22 13:01:10,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 18 [2020-11-22 13:01:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:01:10,276 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-11-22 13:01:10,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-22 13:01:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-11-22 13:01:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-22 13:01:10,277 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:01:10,277 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-11-22 13:01:10,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-22 13:01:10,478 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-22 13:01:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:01:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1688088605, now seen corresponding path program 2 times [2020-11-22 13:01:10,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:01:10,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18675126] [2020-11-22 13:01:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:01:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:01:10,508 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:01:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:01:10,562 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:01:10,590 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:01:10,590 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:01:10,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-22 13:01:10,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:01:10 BoogieIcfgContainer [2020-11-22 13:01:10,637 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:01:10,638 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:01:10,638 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:01:10,638 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:01:10,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:01:05" (3/4) ... [2020-11-22 13:01:10,640 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:01:10,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_08096cb0-5d49-46f7-9cd9-350bbe1b54a9/bin/utaipan/witness.graphml [2020-11-22 13:01:10,706 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:01:10,707 INFO L168 Benchmark]: Toolchain (without parser) took 5763.65 ms. Allocated memory was 92.3 MB in the beginning and 151.0 MB in the end (delta: 58.7 MB). Free memory was 61.7 MB in the beginning and 115.6 MB in the end (delta: -53.9 MB). Peak memory consumption was 4.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:10,707 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:10,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.07 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 61.7 MB in the beginning and 103.1 MB in the end (delta: -41.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:10,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.53 ms. Allocated memory is still 125.8 MB. Free memory was 102.4 MB in the beginning and 101.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:10,708 INFO L168 Benchmark]: Boogie Preprocessor took 22.49 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 100.3 MB in the end (delta: 731.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:10,709 INFO L168 Benchmark]: RCFGBuilder took 592.60 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 75.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:10,709 INFO L168 Benchmark]: TraceAbstraction took 4822.76 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 75.1 MB in the beginning and 118.7 MB in the end (delta: -43.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:01:10,710 INFO L168 Benchmark]: Witness Printer took 68.12 ms. Allocated memory is still 151.0 MB. Free memory was 118.7 MB in the beginning and 115.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:01:10,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 48.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 219.07 ms. Allocated memory was 92.3 MB in the beginning and 125.8 MB in the end (delta: 33.6 MB). Free memory was 61.7 MB in the beginning and 103.1 MB in the end (delta: -41.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.53 ms. Allocated memory is still 125.8 MB. Free memory was 102.4 MB in the beginning and 101.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.49 ms. Allocated memory is still 125.8 MB. Free memory was 101.0 MB in the beginning and 100.3 MB in the end (delta: 731.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 592.60 ms. Allocated memory is still 125.8 MB. Free memory was 100.3 MB in the beginning and 75.9 MB in the end (delta: 24.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4822.76 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 75.1 MB in the beginning and 118.7 MB in the end (delta: -43.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 68.12 ms. Allocated memory is still 151.0 MB. Free memory was 118.7 MB in the beginning and 115.6 MB in the end (delta: 3.1 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: 16]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L8] char* p = malloc(10 * sizeof(int)); [L10] int i = 0; [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND TRUE i < 10 [L11] p[i] = __VERIFIER_nondet_char() [L10] i++ [L10] COND FALSE !(i < 10) [L14] free(p) [L14] free(p) [L14] free(p) [L16] p[2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.7s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 97 SDslu, 40 SDs, 0 SdLazy, 174 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 145 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 149 ConstructedInterpolants, 0 QuantifiedInterpolants, 6593 SizeOfPredicates, 5 NumberOfNonLiveVariables, 197 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 17 InterpolantComputations, 7 PerfectInterpolantSequences, 93/255 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...