./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_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/realloc1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/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 [2020-11-28 07:35:21,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:35:21,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:35:22,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:35:22,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:35:22,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:35:22,049 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:35:22,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:35:22,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:35:22,059 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:35:22,060 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:35:22,062 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:35:22,062 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:35:22,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:35:22,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:35:22,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:35:22,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:35:22,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:35:22,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:35:22,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:35:22,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:35:22,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:35:22,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:35:22,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:35:22,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:35:22,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:35:22,084 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:35:22,085 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:35:22,086 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:35:22,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:35:22,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:35:22,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:35:22,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:35:22,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:35:22,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:35:22,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:35:22,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:35:22,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:35:22,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:35:22,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:35:22,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:35:22,103 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:35:22,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:35:22,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:35:22,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:35:22,130 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:35:22,131 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:35:22,131 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:35:22,131 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:35:22,131 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:35:22,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:35:22,132 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:35:22,132 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:35:22,132 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:35:22,133 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:35:22,133 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:35:22,133 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:35:22,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:35:22,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:35:22,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:35:22,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:35:22,134 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:35:22,135 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:35:22,135 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:35:22,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:35:22,140 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:35:22,141 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:35:22,141 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:35:22,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:35:22,141 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:35:22,141 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:35:22,142 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:35:22,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:35:22,142 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:35:22,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:35:22,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:35:22,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:35:22,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:35:22,143 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:35:22,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:35:22,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:35:22,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:35:22,144 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_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 937cfa07aecfb3a07a3e6e685c2e5e481fbe44b8 [2020-11-28 07:35:22,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:35:22,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:35:22,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:35:22,424 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:35:22,425 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:35:22,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-11-28 07:35:22,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/data/14dbdb029/98b18f4928aa4c20892a96d0bf641424/FLAG692e032d1 [2020-11-28 07:35:22,983 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:35:22,985 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/sv-benchmarks/c/memsafety-ext3/realloc1.c [2020-11-28 07:35:22,997 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/data/14dbdb029/98b18f4928aa4c20892a96d0bf641424/FLAG692e032d1 [2020-11-28 07:35:23,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/data/14dbdb029/98b18f4928aa4c20892a96d0bf641424 [2020-11-28 07:35:23,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:35:23,347 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:35:23,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:23,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:35:23,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:35:23,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7153c5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23, skipping insertion in model container [2020-11-28 07:35:23,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:35:23,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:35:23,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:23,572 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:35:23,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:35:23,599 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:35:23,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23 WrapperNode [2020-11-28 07:35:23,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:35:23,601 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:23,601 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:35:23,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:35:23,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:35:23,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:35:23,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:35:23,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:35:23,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... [2020-11-28 07:35:23,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:35:23,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:35:23,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:35:23,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:35:23,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/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 07:35:23,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:35:23,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:35:23,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:35:23,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:35:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:35:23,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 07:35:24,242 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:35:24,243 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-11-28 07:35:24,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:24 BoogieIcfgContainer [2020-11-28 07:35:24,245 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:35:24,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:35:24,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:35:24,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:35:24,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:35:23" (1/3) ... [2020-11-28 07:35:24,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e49ebca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:24, skipping insertion in model container [2020-11-28 07:35:24,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:35:23" (2/3) ... [2020-11-28 07:35:24,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e49ebca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:35:24, skipping insertion in model container [2020-11-28 07:35:24,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:24" (3/3) ... [2020-11-28 07:35:24,254 INFO L111 eAbstractionObserver]: Analyzing ICFG realloc1.c [2020-11-28 07:35:24,266 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:35:24,270 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-11-28 07:35:24,283 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-11-28 07:35:24,304 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:35:24,304 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:35:24,304 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:35:24,305 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:35:24,305 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:35:24,305 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:35:24,305 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:35:24,305 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:35:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-28 07:35:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:35:24,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:24,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:35:24,326 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]=== [2020-11-28 07:35:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:24,331 INFO L82 PathProgramCache]: Analyzing trace with hash 76559, now seen corresponding path program 1 times [2020-11-28 07:35:24,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:24,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554900680] [2020-11-28 07:35:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:24,466 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 07:35:24,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554900680] [2020-11-28 07:35:24,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:24,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:35:24,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862486663] [2020-11-28 07:35:24,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:24,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:24,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:24,489 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-11-28 07:35:24,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:24,527 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-11-28 07:35:24,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:24,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:35:24,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:24,537 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:35:24,537 INFO L226 Difference]: Without dead ends: 20 [2020-11-28 07:35:24,538 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 [2020-11-28 07:35:24,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-28 07:35:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-11-28 07:35:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-28 07:35:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-28 07:35:24,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 3 [2020-11-28 07:35:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:24,595 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-28 07:35:24,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-28 07:35:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:35:24,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:24,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:35:24,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:35:24,597 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]=== [2020-11-28 07:35:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash 75280, now seen corresponding path program 1 times [2020-11-28 07:35:24,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:24,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101970568] [2020-11-28 07:35:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:24,658 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 07:35:24,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101970568] [2020-11-28 07:35:24,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:24,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:35:24,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030832745] [2020-11-28 07:35:24,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:24,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:24,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:24,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:24,662 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 3 states. [2020-11-28 07:35:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:24,694 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-28 07:35:24,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:24,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:35:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:24,696 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:35:24,696 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:35:24,696 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 07:35:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:35:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 07:35:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:35:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-28 07:35:24,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2020-11-28 07:35:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:24,700 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-28 07:35:24,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-28 07:35:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:35:24,700 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:24,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:35:24,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:35:24,701 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]=== [2020-11-28 07:35:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:24,701 INFO L82 PathProgramCache]: Analyzing trace with hash 75281, now seen corresponding path program 1 times [2020-11-28 07:35:24,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:24,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027609615] [2020-11-28 07:35:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:24,763 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 07:35:24,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027609615] [2020-11-28 07:35:24,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:24,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:35:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429464488] [2020-11-28 07:35:24,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:24,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:24,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:24,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:24,766 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 3 states. [2020-11-28 07:35:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:24,803 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-28 07:35:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:24,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 07:35:24,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:24,804 INFO L225 Difference]: With dead ends: 16 [2020-11-28 07:35:24,804 INFO L226 Difference]: Without dead ends: 16 [2020-11-28 07:35:24,805 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 07:35:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-28 07:35:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-28 07:35:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-28 07:35:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-28 07:35:24,807 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2020-11-28 07:35:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:24,808 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-28 07:35:24,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-28 07:35:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:35:24,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:24,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:35:24,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:35:24,809 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]=== [2020-11-28 07:35:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 72381238, now seen corresponding path program 1 times [2020-11-28 07:35:24,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:24,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815401797] [2020-11-28 07:35:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 07:35:24,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815401797] [2020-11-28 07:35:24,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:24,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-28 07:35:24,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137210071] [2020-11-28 07:35:24,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:24,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:24,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:35:24,865 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-11-28 07:35:24,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:24,884 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-28 07:35:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:24,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-28 07:35:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:24,885 INFO L225 Difference]: With dead ends: 15 [2020-11-28 07:35:24,885 INFO L226 Difference]: Without dead ends: 15 [2020-11-28 07:35:24,886 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 07:35:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-28 07:35:24,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-28 07:35:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:35:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-28 07:35:24,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2020-11-28 07:35:24,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:24,889 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-28 07:35:24,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:24,889 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-28 07:35:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:35:24,889 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:24,890 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-28 07:35:24,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:35:24,890 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]=== [2020-11-28 07:35:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash 72379960, now seen corresponding path program 1 times [2020-11-28 07:35:24,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:24,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929989680] [2020-11-28 07:35:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:25,049 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 07:35:25,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929989680] [2020-11-28 07:35:25,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294191546] [2020-11-28 07:35:25,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/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 07:35:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 07:35:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:25,165 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 07:35:25,166 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:35:25,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:35:25,174 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:35:25,175 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 07:35:25,185 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 07:35:25,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:25,226 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 07:35:25,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288726655] [2020-11-28 07:35:25,250 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-28 07:35:25,250 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:25,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:25,263 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:25,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:25,833 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:26,072 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:26,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:35:26,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2020-11-28 07:35:26,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417962844] [2020-11-28 07:35:26,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:35:26,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:35:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:35:26,074 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-11-28 07:35:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:26,210 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-11-28 07:35:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:35:26,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2020-11-28 07:35:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:26,212 INFO L225 Difference]: With dead ends: 35 [2020-11-28 07:35:26,212 INFO L226 Difference]: Without dead ends: 35 [2020-11-28 07:35:26,213 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 [2020-11-28 07:35:26,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-28 07:35:26,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-11-28 07:35:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:35:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-28 07:35:26,217 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 5 [2020-11-28 07:35:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:26,217 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-28 07:35:26,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:35:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-28 07:35:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:35:26,217 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:26,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2020-11-28 07:35:26,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:26,440 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]=== [2020-11-28 07:35:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:26,440 INFO L82 PathProgramCache]: Analyzing trace with hash 198927928, now seen corresponding path program 1 times [2020-11-28 07:35:26,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:26,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115191196] [2020-11-28 07:35:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:26,488 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 07:35:26,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115191196] [2020-11-28 07:35:26,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824906155] [2020-11-28 07:35:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 07:35:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:26,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:35:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:26,549 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 07:35:26,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:26,583 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 07:35:26,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443950350] [2020-11-28 07:35:26,585 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-28 07:35:26,585 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:26,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:26,586 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:26,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:26,869 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:27,112 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:27,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:35:27,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2020-11-28 07:35:27,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326997247] [2020-11-28 07:35:27,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:35:27,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:35:27,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-11-28 07:35:27,115 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2020-11-28 07:35:27,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:27,158 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-11-28 07:35:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:35:27,162 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2020-11-28 07:35:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:27,163 INFO L225 Difference]: With dead ends: 25 [2020-11-28 07:35:27,163 INFO L226 Difference]: Without dead ends: 25 [2020-11-28 07:35:27,164 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 [2020-11-28 07:35:27,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-28 07:35:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-11-28 07:35:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 07:35:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-28 07:35:27,167 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 8 [2020-11-28 07:35:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:27,167 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-28 07:35:27,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:35:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-28 07:35:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:35:27,168 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:27,168 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2020-11-28 07:35:27,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:35:27,369 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]=== [2020-11-28 07:35:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:27,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1941212115, now seen corresponding path program 2 times [2020-11-28 07:35:27,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:27,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394466384] [2020-11-28 07:35:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:35:27,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394466384] [2020-11-28 07:35:27,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:35:27,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 07:35:27,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931066503] [2020-11-28 07:35:27,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:35:27,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:35:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:35:27,518 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-11-28 07:35:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:27,564 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-28 07:35:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:35:27,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-28 07:35:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:27,567 INFO L225 Difference]: With dead ends: 22 [2020-11-28 07:35:27,567 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 07:35:27,567 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 [2020-11-28 07:35:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 07:35:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 07:35:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 07:35:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-11-28 07:35:27,570 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 11 [2020-11-28 07:35:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:27,571 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-11-28 07:35:27,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:35:27,571 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-11-28 07:35:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:35:27,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:27,571 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1] [2020-11-28 07:35:27,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-28 07:35:27,572 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]=== [2020-11-28 07:35:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash -409368164, now seen corresponding path program 2 times [2020-11-28 07:35:27,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:27,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587730330] [2020-11-28 07:35:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:27,669 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 07:35:27,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587730330] [2020-11-28 07:35:27,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8913346] [2020-11-28 07:35:27,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/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 07:35:27,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-28 07:35:27,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:35:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 07:35:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:27,728 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 07:35:27,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:27,731 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 07:35:27,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:35:27,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [8] total 9 [2020-11-28 07:35:27,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892139875] [2020-11-28 07:35:27,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:35:27,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:27,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:35:27,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:35:27,733 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 3 states. [2020-11-28 07:35:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:27,750 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-11-28 07:35:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:35:27,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-28 07:35:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:27,751 INFO L225 Difference]: With dead ends: 21 [2020-11-28 07:35:27,751 INFO L226 Difference]: Without dead ends: 21 [2020-11-28 07:35:27,752 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 [2020-11-28 07:35:27,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-28 07:35:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-28 07:35:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 07:35:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-11-28 07:35:27,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-11-28 07:35:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:27,755 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-11-28 07:35:27,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:35:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-11-28 07:35:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:35:27,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:27,756 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:27,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-28 07:35:27,972 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]=== [2020-11-28 07:35:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1734187391, now seen corresponding path program 1 times [2020-11-28 07:35:27,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:27,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952508529] [2020-11-28 07:35:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:28,088 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 07:35:28,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952508529] [2020-11-28 07:35:28,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425203607] [2020-11-28 07:35:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/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 07:35:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:35:28,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:35:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:35:28,170 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 07:35:28,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:35:28,244 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 07:35:28,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561834245] [2020-11-28 07:35:28,250 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-28 07:35:28,250 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:35:28,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-28 07:35:28,251 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-28 07:35:28,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-28 07:35:28,495 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-28 07:35:28,874 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-28 07:35:28,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:35:28,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2020-11-28 07:35:28,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420483828] [2020-11-28 07:35:28,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:35:28,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:35:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:35:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:35:28,876 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-11-28 07:35:28,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:35:28,927 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-28 07:35:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-28 07:35:28,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-28 07:35:28,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:35:28,928 INFO L225 Difference]: With dead ends: 29 [2020-11-28 07:35:28,928 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 07:35:28,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:35:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 07:35:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-28 07:35:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-28 07:35:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-11-28 07:35:28,932 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 18 [2020-11-28 07:35:28,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:35:28,932 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-11-28 07:35:28,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:35:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-11-28 07:35:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-28 07:35:28,933 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:35:28,933 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-11-28 07:35:29,134 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-28 07:35:29,134 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]=== [2020-11-28 07:35:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:35:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1688088605, now seen corresponding path program 2 times [2020-11-28 07:35:29,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:35:29,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120901120] [2020-11-28 07:35:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:35:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:35:29,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:35:29,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:35:29,190 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:35:29,210 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:35:29,210 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:35:29,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-11-28 07:35:29,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:35:29 BoogieIcfgContainer [2020-11-28 07:35:29,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:35:29,264 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:35:29,265 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:35:29,265 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:35:29,265 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:35:24" (3/4) ... [2020-11-28 07:35:29,267 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:35:29,329 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2d0aa892-267b-4fa1-9fe9-28daa20f52b1/bin/utaipan/witness.graphml [2020-11-28 07:35:29,329 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:35:29,330 INFO L168 Benchmark]: Toolchain (without parser) took 5982.35 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 65.1 MB in the beginning and 54.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:29,331 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 75.5 MB. Free memory was 49.6 MB in the beginning and 49.6 MB in the end (delta: 22.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:35:29,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.28 ms. Allocated memory is still 98.6 MB. Free memory was 64.9 MB in the beginning and 76.3 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:29,332 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.25 ms. Allocated memory is still 98.6 MB. Free memory was 76.3 MB in the beginning and 75.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:35:29,332 INFO L168 Benchmark]: Boogie Preprocessor took 33.10 ms. Allocated memory is still 98.6 MB. Free memory was 75.1 MB in the beginning and 73.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:29,332 INFO L168 Benchmark]: RCFGBuilder took 563.13 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 49.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:29,333 INFO L168 Benchmark]: TraceAbstraction took 5017.29 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 49.0 MB in the beginning and 56.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 41.0 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:29,333 INFO L168 Benchmark]: Witness Printer took 64.82 ms. Allocated memory is still 144.7 MB. Free memory was 56.1 MB in the beginning and 54.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:35:29,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 75.5 MB. Free memory was 49.6 MB in the beginning and 49.6 MB in the end (delta: 22.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.28 ms. Allocated memory is still 98.6 MB. Free memory was 64.9 MB in the beginning and 76.3 MB in the end (delta: -11.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.25 ms. Allocated memory is still 98.6 MB. Free memory was 76.3 MB in the beginning and 75.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.10 ms. Allocated memory is still 98.6 MB. Free memory was 75.1 MB in the beginning and 73.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 563.13 ms. Allocated memory is still 98.6 MB. Free memory was 73.7 MB in the beginning and 49.0 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5017.29 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 49.0 MB in the beginning and 56.1 MB in the end (delta: -7.1 MB). Peak memory consumption was 41.0 MB. Max. memory is 16.1 GB. * Witness Printer took 64.82 ms. Allocated memory is still 144.7 MB. Free memory was 56.1 MB in the beginning and 54.1 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: 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: 4.9s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 0.4s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s 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, 0.9s 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...