./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7efcb16e512d7de15a71f6cd895dcd8493c4b646 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-19 22:58:55,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 22:58:55,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 22:58:55,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 22:58:55,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 22:58:55,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 22:58:55,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 22:58:56,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 22:58:56,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 22:58:56,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 22:58:56,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 22:58:56,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 22:58:56,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 22:58:56,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 22:58:56,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 22:58:56,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 22:58:56,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 22:58:56,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 22:58:56,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 22:58:56,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 22:58:56,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 22:58:56,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 22:58:56,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 22:58:56,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 22:58:56,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 22:58:56,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 22:58:56,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 22:58:56,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 22:58:56,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 22:58:56,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 22:58:56,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 22:58:56,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 22:58:56,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 22:58:56,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 22:58:56,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 22:58:56,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 22:58:56,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 22:58:56,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 22:58:56,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 22:58:56,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 22:58:56,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 22:58:56,046 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 22:58:56,070 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 22:58:56,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 22:58:56,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 22:58:56,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 22:58:56,071 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 22:58:56,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 22:58:56,072 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 22:58:56,072 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 22:58:56,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 22:58:56,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 22:58:56,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 22:58:56,072 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 22:58:56,073 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 22:58:56,073 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 22:58:56,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 22:58:56,073 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 22:58:56,073 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 22:58:56,073 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 22:58:56,074 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 22:58:56,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 22:58:56,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 22:58:56,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 22:58:56,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 22:58:56,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 22:58:56,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 22:58:56,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 22:58:56,075 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 22:58:56,075 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 22:58:56,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 22:58:56,086 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer 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 -> Automizer 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 -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2019-11-19 22:58:56,235 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 22:58:56,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 22:58:56,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 22:58:56,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 22:58:56,249 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 22:58:56,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3.c [2019-11-19 22:58:56,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/data/9d7de189e/cc5de8d55495444bb620aba0e7dbb9b3/FLAG36237efcf [2019-11-19 22:58:56,675 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 22:58:56,676 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/sv-benchmarks/c/memsafety-ext3/scopes3.c [2019-11-19 22:58:56,680 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/data/9d7de189e/cc5de8d55495444bb620aba0e7dbb9b3/FLAG36237efcf [2019-11-19 22:58:56,692 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/data/9d7de189e/cc5de8d55495444bb620aba0e7dbb9b3 [2019-11-19 22:58:56,695 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 22:58:56,696 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 22:58:56,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 22:58:56,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 22:58:56,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 22:58:56,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:56,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62978216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56, skipping insertion in model container [2019-11-19 22:58:56,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:56,710 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 22:58:56,722 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 22:58:56,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:58:56,890 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 22:58:56,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 22:58:56,998 INFO L192 MainTranslator]: Completed translation [2019-11-19 22:58:56,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56 WrapperNode [2019-11-19 22:58:56,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 22:58:57,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 22:58:57,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 22:58:57,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 22:58:57,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:57,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:57,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:57,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:57,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:57,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:57,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... [2019-11-19 22:58:57,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 22:58:57,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 22:58:57,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 22:58:57,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 22:58:57,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/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 [2019-11-19 22:58:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 22:58:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 22:58:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 22:58:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 22:58:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 22:58:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 22:58:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 22:58:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 22:58:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 22:58:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 22:58:57,310 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 22:58:57,310 INFO L285 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-19 22:58:57,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:58:57 BoogieIcfgContainer [2019-11-19 22:58:57,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 22:58:57,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 22:58:57,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 22:58:57,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 22:58:57,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 10:58:56" (1/3) ... [2019-11-19 22:58:57,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653df6b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:58:57, skipping insertion in model container [2019-11-19 22:58:57,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 10:58:56" (2/3) ... [2019-11-19 22:58:57,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653df6b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 10:58:57, skipping insertion in model container [2019-11-19 22:58:57,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:58:57" (3/3) ... [2019-11-19 22:58:57,318 INFO L109 eAbstractionObserver]: Analyzing ICFG scopes3.c [2019-11-19 22:58:57,327 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 22:58:57,332 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-11-19 22:58:57,342 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-11-19 22:58:57,358 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 22:58:57,359 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 22:58:57,359 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 22:58:57,359 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 22:58:57,359 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 22:58:57,359 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 22:58:57,359 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 22:58:57,359 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 22:58:57,371 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-19 22:58:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 22:58:57,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:58:57,380 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:58:57,381 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 22:58:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:58:57,386 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2019-11-19 22:58:57,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:58:57,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1608359546] [2019-11-19 22:58:57,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:58:57,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-19 22:58:57,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:58:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:57,487 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:58:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:57,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1608359546] [2019-11-19 22:58:57,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:58:57,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 22:58:57,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925597294] [2019-11-19 22:58:57,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-19 22:58:57,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:58:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-19 22:58:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:58:57,545 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-19 22:58:57,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:58:57,558 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-11-19 22:58:57,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-19 22:58:57,559 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-19 22:58:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:58:57,567 INFO L225 Difference]: With dead ends: 20 [2019-11-19 22:58:57,567 INFO L226 Difference]: Without dead ends: 17 [2019-11-19 22:58:57,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-19 22:58:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-19 22:58:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-19 22:58:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-19 22:58:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-19 22:58:57,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 8 [2019-11-19 22:58:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:58:57,602 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-19 22:58:57,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-19 22:58:57,602 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-19 22:58:57,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 22:58:57,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:58:57,603 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:58:57,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:57,810 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 22:58:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:58:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2019-11-19 22:58:57,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:58:57,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [457760131] [2019-11-19 22:58:57,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:58:57,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 22:58:57,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:58:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:57,881 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:58:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:57,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [457760131] [2019-11-19 22:58:57,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:58:57,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-19 22:58:57,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79290834] [2019-11-19 22:58:57,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:58:57,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:58:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:58:57,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:58:57,908 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 4 states. [2019-11-19 22:58:57,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:58:57,935 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-19 22:58:57,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 22:58:57,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-19 22:58:57,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:58:57,937 INFO L225 Difference]: With dead ends: 23 [2019-11-19 22:58:57,937 INFO L226 Difference]: Without dead ends: 23 [2019-11-19 22:58:57,937 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:58:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-19 22:58:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-11-19 22:58:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-19 22:58:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-19 22:58:57,942 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2019-11-19 22:58:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:58:57,942 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-19 22:58:57,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:58:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-19 22:58:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 22:58:57,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:58:57,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:58:58,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:58,149 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 22:58:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:58:58,150 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2019-11-19 22:58:58,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:58:58,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [559792628] [2019-11-19 22:58:58,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:58,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:58:58,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 22:58:58,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:58:58,262 INFO L377 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 [2019-11-19 22:58:58,263 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:58:58,282 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:58:58,283 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:58:58,283 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 22:58:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:58,294 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:58:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:58,346 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [559792628] [2019-11-19 22:58:58,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:58:58,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 22:58:58,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155700404] [2019-11-19 22:58:58,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 22:58:58,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:58:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 22:58:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:58:58,348 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2019-11-19 22:58:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:58:58,369 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-11-19 22:58:58,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:58:58,370 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-19 22:58:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:58:58,371 INFO L225 Difference]: With dead ends: 19 [2019-11-19 22:58:58,371 INFO L226 Difference]: Without dead ends: 19 [2019-11-19 22:58:58,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 22:58:58,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-19 22:58:58,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-19 22:58:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-19 22:58:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-19 22:58:58,375 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 8 [2019-11-19 22:58:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:58:58,376 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-19 22:58:58,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 22:58:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-19 22:58:58,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-19 22:58:58,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:58:58,376 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:58:58,580 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:58,580 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 22:58:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:58:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2019-11-19 22:58:58,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:58:58,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2062904592] [2019-11-19 22:58:58,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:58:58,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 22:58:58,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:58:58,643 INFO L377 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 [2019-11-19 22:58:58,643 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 22:58:58,646 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 22:58:58,646 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 22:58:58,646 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 22:58:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:58,655 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:58:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:58,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062904592] [2019-11-19 22:58:58,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 22:58:58,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 22:58:58,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284391334] [2019-11-19 22:58:58,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 22:58:58,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:58:58,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 22:58:58,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:58:58,664 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 3 states. [2019-11-19 22:58:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:58:58,696 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-11-19 22:58:58,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 22:58:58,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-19 22:58:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:58:58,698 INFO L225 Difference]: With dead ends: 18 [2019-11-19 22:58:58,698 INFO L226 Difference]: Without dead ends: 18 [2019-11-19 22:58:58,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 22:58:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-19 22:58:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-19 22:58:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-19 22:58:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-19 22:58:58,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2019-11-19 22:58:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:58:58,701 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-19 22:58:58,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 22:58:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-19 22:58:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-19 22:58:58,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:58:58,702 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:58:58,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:58,903 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 22:58:58,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:58:58,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 1 times [2019-11-19 22:58:58,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:58:58,905 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1464961636] [2019-11-19 22:58:58,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 22:58:58,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 22:58:58,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:58:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:59,044 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:58:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:59,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464961636] [2019-11-19 22:58:59,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:58:59,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-19 22:58:59,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625995036] [2019-11-19 22:58:59,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 22:58:59,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:58:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 22:58:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-19 22:58:59,105 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 8 states. [2019-11-19 22:58:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:58:59,254 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-19 22:58:59,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 22:58:59,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-11-19 22:58:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:58:59,255 INFO L225 Difference]: With dead ends: 30 [2019-11-19 22:58:59,256 INFO L226 Difference]: Without dead ends: 30 [2019-11-19 22:58:59,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-19 22:58:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-19 22:58:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-19 22:58:59,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 22:58:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-19 22:58:59,260 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 14 [2019-11-19 22:58:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:58:59,261 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-19 22:58:59,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 22:58:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-19 22:58:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-19 22:58:59,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:58:59,262 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:58:59,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:59,464 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 22:58:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:58:59,464 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 2 times [2019-11-19 22:58:59,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:58:59,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1464582123] [2019-11-19 22:58:59,465 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:58:59,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-19 22:58:59,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-19 22:58:59,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-19 22:58:59,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 22:58:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:59,712 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 22:58:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 22:58:59,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464582123] [2019-11-19 22:58:59,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-19 22:58:59,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-11-19 22:58:59,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926723923] [2019-11-19 22:58:59,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-19 22:58:59,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 22:58:59,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-19 22:58:59,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-11-19 22:58:59,963 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 16 states. [2019-11-19 22:59:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 22:59:00,304 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-11-19 22:59:00,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-19 22:59:00,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-19 22:59:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 22:59:00,306 INFO L225 Difference]: With dead ends: 42 [2019-11-19 22:59:00,306 INFO L226 Difference]: Without dead ends: 42 [2019-11-19 22:59:00,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2019-11-19 22:59:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-19 22:59:00,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-19 22:59:00,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-19 22:59:00,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-11-19 22:59:00,312 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 26 [2019-11-19 22:59:00,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 22:59:00,313 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-11-19 22:59:00,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-19 22:59:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-11-19 22:59:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-19 22:59:00,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 22:59:00,317 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 22:59:00,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:59:00,518 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-19 22:59:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 22:59:00,518 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 3 times [2019-11-19 22:59:00,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 22:59:00,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1760278200] [2019-11-19 22:59:00,519 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 22:59:00,788 ERROR L271 FreeRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-11-19 22:59:00,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [628882374] [2019-11-19 22:59:00,789 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:59:01,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-19 22:59:01,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2019-11-19 22:59:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 22:59:01,219 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-19 22:59:01,220 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 22:59:01,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-19 22:59:01,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 10:59:01 BoogieIcfgContainer [2019-11-19 22:59:01,454 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 22:59:01,454 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 22:59:01,454 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 22:59:01,455 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 22:59:01,455 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 10:58:57" (3/4) ... [2019-11-19 22:59:01,457 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 22:59:01,515 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5f866928-c647-46ef-8338-b03fa995aa8a/bin/uautomizer/witness.graphml [2019-11-19 22:59:01,515 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 22:59:01,516 INFO L168 Benchmark]: Toolchain (without parser) took 4820.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 951.4 MB in the beginning and 932.4 MB in the end (delta: 19.1 MB). Peak memory consumption was 174.3 MB. Max. memory is 11.5 GB. [2019-11-19 22:59:01,517 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:59:01,517 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -198.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-19 22:59:01,518 INFO L168 Benchmark]: Boogie Preprocessor took 32.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 22:59:01,518 INFO L168 Benchmark]: RCFGBuilder took 278.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-19 22:59:01,519 INFO L168 Benchmark]: TraceAbstraction took 4141.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 937.7 MB in the end (delta: 193.9 MB). Peak memory consumption was 193.9 MB. Max. memory is 11.5 GB. [2019-11-19 22:59:01,519 INFO L168 Benchmark]: Witness Printer took 60.92 ms. Allocated memory is still 1.2 GB. Free memory was 937.7 MB in the beginning and 932.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-19 22:59:01,521 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 302.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 951.4 MB in the beginning and 1.1 GB in the end (delta: -198.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 32.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 278.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4141.64 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 937.7 MB in the end (delta: 193.9 MB). Peak memory consumption was 193.9 MB. Max. memory is 11.5 GB. * Witness Printer took 60.92 ms. Allocated memory is still 1.2 GB. Free memory was 937.7 MB in the beginning and 932.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=0, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=0, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=1, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=1, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=2, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=2, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=3, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=3, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=4, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=4, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=5, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=5, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=6, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=6, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=7, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=7, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=8, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=8, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=9, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=9, p={3:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={3:0}] [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 5 error locations. Result: UNSAFE, OverallTime: 4.0s, OverallIterations: 7, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 89 SDtfs, 67 SDslu, 183 SDs, 0 SdLazy, 166 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=6, 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, 6 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 5949 SizeOfPredicates, 8 NumberOfNonLiveVariables, 294 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 0/112 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...