./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa 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_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-25 08:45:37,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:45:37,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:45:37,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:45:37,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:45:37,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:45:37,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:45:37,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:45:37,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:45:37,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:45:37,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:45:37,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:45:37,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:45:37,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:45:37,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:45:37,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:45:37,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:45:37,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:45:37,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:45:37,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:45:37,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:45:37,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:45:37,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:45:37,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:45:37,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:45:37,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:45:37,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:45:37,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:45:37,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:45:37,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:45:37,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:45:37,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:45:37,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:45:37,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:45:37,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:45:37,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:45:37,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:45:37,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:45:37,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:45:37,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:45:37,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:45:37,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:45:37,304 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:45:37,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:45:37,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:45:37,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:45:37,315 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:45:37,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:45:37,316 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:45:37,316 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:45:37,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:45:37,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:45:37,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:45:37,317 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:45:37,317 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:45:37,317 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:45:37,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:45:37,318 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:45:37,318 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:45:37,318 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:45:37,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:45:37,318 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:45:37,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:45:37,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:45:37,320 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:45:37,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:45:37,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:45:37,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:45:37,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:45:37,321 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:45:37,321 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:45:37,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:45:37,322 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_075970e1-3028-4b9e-910f-4a23553fc164/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 -> bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 [2019-11-25 08:45:37,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:45:37,507 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:45:37,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:45:37,511 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:45:37,512 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:45:37,513 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2019-11-25 08:45:37,574 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/data/53ae5b456/33715518e0ff4a43bb588bfd8d02fb31/FLAGdba57a966 [2019-11-25 08:45:37,963 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:45:37,963 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2019-11-25 08:45:37,970 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/data/53ae5b456/33715518e0ff4a43bb588bfd8d02fb31/FLAGdba57a966 [2019-11-25 08:45:38,372 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/data/53ae5b456/33715518e0ff4a43bb588bfd8d02fb31 [2019-11-25 08:45:38,374 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:45:38,375 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:45:38,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:45:38,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:45:38,380 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:45:38,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283c3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38, skipping insertion in model container [2019-11-25 08:45:38,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:45:38,405 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:45:38,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:45:38,708 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:45:38,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:45:38,736 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:45:38,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38 WrapperNode [2019-11-25 08:45:38,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:45:38,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:45:38,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:45:38,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:45:38,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... [2019-11-25 08:45:38,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:45:38,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:45:38,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:45:38,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:45:38,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:38,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:45:38,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:45:38,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:45:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:45:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:45:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-25 08:45:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:45:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:45:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-25 08:45:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-25 08:45:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:45:38,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:45:38,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:45:39,206 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:45:39,207 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-25 08:45:39,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:45:39 BoogieIcfgContainer [2019-11-25 08:45:39,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:45:39,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:45:39,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:45:39,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:45:39,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:45:38" (1/3) ... [2019-11-25 08:45:39,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c19544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:45:39, skipping insertion in model container [2019-11-25 08:45:39,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:45:38" (2/3) ... [2019-11-25 08:45:39,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c19544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:45:39, skipping insertion in model container [2019-11-25 08:45:39,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:45:39" (3/3) ... [2019-11-25 08:45:39,215 INFO L109 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2019-11-25 08:45:39,224 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:45:39,230 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-11-25 08:45:39,240 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-11-25 08:45:39,259 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:45:39,259 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:45:39,259 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:45:39,259 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:45:39,260 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:45:39,260 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:45:39,260 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:45:39,260 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:45:39,275 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-25 08:45:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:45:39,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:39,284 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:39,285 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:39,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash 996996062, now seen corresponding path program 1 times [2019-11-25 08:45:39,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:39,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1052059563] [2019-11-25 08:45:39,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:45:39,400 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-25 08:45:39,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:39,415 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:39,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1052059563] [2019-11-25 08:45:39,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:45:39,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:45:39,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312284810] [2019-11-25 08:45:39,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:45:39,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:39,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:45:39,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:45:39,451 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-11-25 08:45:39,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:39,464 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-11-25 08:45:39,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:45:39,465 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-25 08:45:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:39,472 INFO L225 Difference]: With dead ends: 28 [2019-11-25 08:45:39,472 INFO L226 Difference]: Without dead ends: 25 [2019-11-25 08:45:39,473 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 [2019-11-25 08:45:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-25 08:45:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-25 08:45:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-25 08:45:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-25 08:45:39,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 8 [2019-11-25 08:45:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:39,502 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-25 08:45:39,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:45:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-25 08:45:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:45:39,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:39,503 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:39,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:39,704 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash 996995752, now seen corresponding path program 1 times [2019-11-25 08:45:39,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:39,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [182300680] [2019-11-25 08:45:39,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:45:39,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:45:39,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:39,771 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:39,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [182300680] [2019-11-25 08:45:39,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:45:39,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-25 08:45:39,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519193392] [2019-11-25 08:45:39,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:45:39,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:45:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:45:39,796 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2019-11-25 08:45:39,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:39,849 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-11-25 08:45:39,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:45:39,850 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-25 08:45:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:39,851 INFO L225 Difference]: With dead ends: 32 [2019-11-25 08:45:39,851 INFO L226 Difference]: Without dead ends: 32 [2019-11-25 08:45:39,852 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 [2019-11-25 08:45:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-25 08:45:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-11-25 08:45:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-25 08:45:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-25 08:45:39,857 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2019-11-25 08:45:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:39,857 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-25 08:45:39,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:45:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-25 08:45:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:45:39,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:39,858 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:40,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:40,061 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:40,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:40,061 INFO L82 PathProgramCache]: Analyzing trace with hash 996995806, now seen corresponding path program 1 times [2019-11-25 08:45:40,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:40,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [982590088] [2019-11-25 08:45:40,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:45:40,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:45:40,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:40,188 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 [2019-11-25 08:45:40,188 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:45:40,199 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:45:40,200 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:45:40,200 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-25 08:45:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:40,263 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:40,395 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [982590088] [2019-11-25 08:45:40,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:45:40,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-25 08:45:40,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058684403] [2019-11-25 08:45:40,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:45:40,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:40,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:45:40,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:45:40,397 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2019-11-25 08:45:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:40,570 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-25 08:45:40,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:45:40,571 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-25 08:45:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:40,572 INFO L225 Difference]: With dead ends: 33 [2019-11-25 08:45:40,572 INFO L226 Difference]: Without dead ends: 33 [2019-11-25 08:45:40,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:45:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-25 08:45:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-11-25 08:45:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-25 08:45:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-25 08:45:40,577 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 8 [2019-11-25 08:45:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:40,577 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-25 08:45:40,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:45:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-25 08:45:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-25 08:45:40,578 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:40,578 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:40,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:40,780 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:40,781 INFO L82 PathProgramCache]: Analyzing trace with hash 996995805, now seen corresponding path program 1 times [2019-11-25 08:45:40,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:40,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [170499925] [2019-11-25 08:45:40,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:45:40,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:45:40,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:40,873 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 [2019-11-25 08:45:40,873 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:45:40,876 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:45:40,876 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:45:40,876 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:45:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:40,884 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:40,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [170499925] [2019-11-25 08:45:40,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:45:40,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:45:40,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488943081] [2019-11-25 08:45:40,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:45:40,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:40,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:45:40,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:45:40,895 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 3 states. [2019-11-25 08:45:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:40,938 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-11-25 08:45:40,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:45:40,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-25 08:45:40,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:40,939 INFO L225 Difference]: With dead ends: 29 [2019-11-25 08:45:40,939 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:45:40,939 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 [2019-11-25 08:45:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:45:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-25 08:45:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:45:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-25 08:45:40,944 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 8 [2019-11-25 08:45:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:40,944 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-25 08:45:40,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:45:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-25 08:45:40,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:45:40,945 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:40,945 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:41,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:41,146 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash 355533743, now seen corresponding path program 1 times [2019-11-25 08:45:41,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:41,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [747507478] [2019-11-25 08:45:41,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:45:41,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:45:41,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:41,271 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:41,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [747507478] [2019-11-25 08:45:41,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:45:41,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-11-25 08:45:41,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293277736] [2019-11-25 08:45:41,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:45:41,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:45:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:45:41,343 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 8 states. [2019-11-25 08:45:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:41,560 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-11-25 08:45:41,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:45:41,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-25 08:45:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:41,562 INFO L225 Difference]: With dead ends: 46 [2019-11-25 08:45:41,562 INFO L226 Difference]: Without dead ends: 46 [2019-11-25 08:45:41,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:45:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-25 08:45:41,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2019-11-25 08:45:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-25 08:45:41,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-25 08:45:41,568 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 16 [2019-11-25 08:45:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:41,568 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-25 08:45:41,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:45:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-25 08:45:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-25 08:45:41,569 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:41,569 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:41,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:41,770 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash 355533796, now seen corresponding path program 1 times [2019-11-25 08:45:41,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:41,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [313481903] [2019-11-25 08:45:41,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:45:41,839 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:45:41,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:41,852 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 [2019-11-25 08:45:41,853 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:45:41,861 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:45:41,861 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:45:41,861 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-25 08:45:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:41,915 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:42,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313481903] [2019-11-25 08:45:42,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:45:42,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2019-11-25 08:45:42,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341395999] [2019-11-25 08:45:42,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:45:42,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:42,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:45:42,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:45:42,409 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 9 states. [2019-11-25 08:45:42,807 WARN L192 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2019-11-25 08:45:43,063 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2019-11-25 08:45:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:43,318 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-11-25 08:45:43,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:45:43,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-25 08:45:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:43,320 INFO L225 Difference]: With dead ends: 44 [2019-11-25 08:45:43,320 INFO L226 Difference]: Without dead ends: 44 [2019-11-25 08:45:43,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:45:43,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-25 08:45:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-25 08:45:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-25 08:45:43,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-25 08:45:43,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 16 [2019-11-25 08:45:43,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:43,326 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-25 08:45:43,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:45:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-25 08:45:43,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-25 08:45:43,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:43,327 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:43,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:43,530 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:43,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash -311692357, now seen corresponding path program 2 times [2019-11-25 08:45:43,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:43,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1835211433] [2019-11-25 08:45:43,532 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/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 [2019-11-25 08:45:43,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:45:43,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:45:43,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:45:43,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:43,633 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 [2019-11-25 08:45:43,633 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:45:43,651 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:45:43,651 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:45:43,651 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:45:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-25 08:45:43,672 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-25 08:45:43,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835211433] [2019-11-25 08:45:43,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:45:43,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-25 08:45:43,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114621006] [2019-11-25 08:45:43,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:45:43,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:45:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:45:43,727 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 4 states. [2019-11-25 08:45:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:43,754 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-25 08:45:43,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:45:43,755 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-25 08:45:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:43,756 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:45:43,756 INFO L226 Difference]: Without dead ends: 42 [2019-11-25 08:45:43,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:45:43,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-25 08:45:43,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-25 08:45:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-25 08:45:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-25 08:45:43,761 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 32 [2019-11-25 08:45:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:43,761 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-25 08:45:43,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:45:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-25 08:45:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-25 08:45:43,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:43,763 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:43,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:43,970 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash -311692304, now seen corresponding path program 2 times [2019-11-25 08:45:43,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:43,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1914083312] [2019-11-25 08:45:43,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:44,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:45:44,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:45:44,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-25 08:45:44,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:44,119 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 [2019-11-25 08:45:44,119 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:45:44,126 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:45:44,127 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:45:44,127 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-25 08:45:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:44,289 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:45,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914083312] [2019-11-25 08:45:45,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:45:45,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2019-11-25 08:45:45,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063442986] [2019-11-25 08:45:45,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:45:45,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:45,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:45:45,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:45:45,618 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2019-11-25 08:45:48,309 WARN L192 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2019-11-25 08:45:49,556 WARN L192 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-11-25 08:45:51,451 WARN L192 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2019-11-25 08:45:52,446 WARN L192 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-11-25 08:45:53,776 WARN L192 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2019-11-25 08:45:54,530 WARN L192 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-25 08:45:55,455 WARN L192 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2019-11-25 08:45:55,809 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-25 08:45:56,365 WARN L192 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-11-25 08:45:56,939 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2019-11-25 08:45:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:57,113 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2019-11-25 08:45:57,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-25 08:45:57,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2019-11-25 08:45:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:57,115 INFO L225 Difference]: With dead ends: 128 [2019-11-25 08:45:57,116 INFO L226 Difference]: Without dead ends: 128 [2019-11-25 08:45:57,116 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=285, Invalid=471, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:45:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-25 08:45:57,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2019-11-25 08:45:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-25 08:45:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2019-11-25 08:45:57,124 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 32 [2019-11-25 08:45:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:57,124 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2019-11-25 08:45:57,124 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:45:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2019-11-25 08:45:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-25 08:45:57,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:57,125 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:57,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:57,329 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:57,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:57,329 INFO L82 PathProgramCache]: Analyzing trace with hash 696281706, now seen corresponding path program 1 times [2019-11-25 08:45:57,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:57,330 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2068914487] [2019-11-25 08:45:57,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:45:57,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:45:57,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:57,539 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:45:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:45:57,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2068914487] [2019-11-25 08:45:57,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:45:57,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-25 08:45:57,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620310335] [2019-11-25 08:45:57,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:45:57,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:45:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:45:57,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:45:57,751 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 18 states. [2019-11-25 08:45:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:45:58,077 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2019-11-25 08:45:58,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:45:58,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-25 08:45:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:45:58,080 INFO L225 Difference]: With dead ends: 74 [2019-11-25 08:45:58,080 INFO L226 Difference]: Without dead ends: 74 [2019-11-25 08:45:58,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:45:58,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-25 08:45:58,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-25 08:45:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-25 08:45:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2019-11-25 08:45:58,088 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 39 [2019-11-25 08:45:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:45:58,088 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2019-11-25 08:45:58,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:45:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2019-11-25 08:45:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-25 08:45:58,090 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:45:58,090 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:45:58,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:58,293 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:45:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:45:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1402269185, now seen corresponding path program 2 times [2019-11-25 08:45:58,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:45:58,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1730826812] [2019-11-25 08:45:58,294 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:45:58,352 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:45:58,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:45:58,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:45:58,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:45:58,360 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 [2019-11-25 08:45:58,360 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:45:58,362 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:45:58,363 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:45:58,363 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:45:58,413 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-25 08:45:58,414 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:46:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-25 08:46:02,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730826812] [2019-11-25 08:46:02,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:02,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-25 08:46:02,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101205183] [2019-11-25 08:46:02,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:46:02,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:46:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:46:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=36, Unknown=2, NotChecked=0, Total=56 [2019-11-25 08:46:02,475 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 8 states. [2019-11-25 08:46:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:02,553 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2019-11-25 08:46:02,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:46:02,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-25 08:46:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:02,555 INFO L225 Difference]: With dead ends: 76 [2019-11-25 08:46:02,555 INFO L226 Difference]: Without dead ends: 74 [2019-11-25 08:46:02,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=23, Invalid=47, Unknown=2, NotChecked=0, Total=72 [2019-11-25 08:46:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-25 08:46:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-25 08:46:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-25 08:46:02,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2019-11-25 08:46:02,565 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 51 [2019-11-25 08:46:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:02,566 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2019-11-25 08:46:02,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:46:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2019-11-25 08:46:02,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-25 08:46:02,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:02,568 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:02,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:46:02,770 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-25 08:46:02,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1402261240, now seen corresponding path program 1 times [2019-11-25 08:46:02,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:46:02,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1293126170] [2019-11-25 08:46:02,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:46:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:03,600 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-25 08:46:03,601 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:46:03,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:46:03,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:46:03 BoogieIcfgContainer [2019-11-25 08:46:03,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:46:03,850 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:46:03,850 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:46:03,850 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:46:03,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:45:39" (3/4) ... [2019-11-25 08:46:03,852 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:46:03,909 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_075970e1-3028-4b9e-910f-4a23553fc164/bin/uautomizer/witness.graphml [2019-11-25 08:46:03,909 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:46:03,910 INFO L168 Benchmark]: Toolchain (without parser) took 25535.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.9 MB). Free memory was 943.4 MB in the beginning and 912.6 MB in the end (delta: 30.8 MB). Peak memory consumption was 234.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:03,911 INFO L168 Benchmark]: CDTParser took 0.26 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. [2019-11-25 08:46:03,911 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -181.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:03,912 INFO L168 Benchmark]: Boogie Preprocessor took 63.72 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. [2019-11-25 08:46:03,912 INFO L168 Benchmark]: RCFGBuilder took 406.99 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: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:03,913 INFO L168 Benchmark]: TraceAbstraction took 24640.47 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.3 MB). Free memory was 1.1 GB in the beginning and 915.3 MB in the end (delta: 187.3 MB). Peak memory consumption was 257.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:03,913 INFO L168 Benchmark]: Witness Printer took 59.49 ms. Allocated memory is still 1.2 GB. Free memory was 915.3 MB in the beginning and 912.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:03,916 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 360.45 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.7 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -181.3 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 63.72 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 406.99 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: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 24640.47 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.3 MB). Free memory was 1.1 GB in the beginning and 915.3 MB in the end (delta: 187.3 MB). Peak memory consumption was 257.5 MB. Max. memory is 11.5 GB. * Witness Printer took 59.49 ms. Allocated memory is still 1.2 GB. Free memory was 915.3 MB in the beginning and 912.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; VAL [alloca(10 * sizeof(char))={2147483584:0}, i=0, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=0, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=0, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=1, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=1, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=1, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=2, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=2, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=97, alloca(10 * sizeof(char))={2147483584:0}, i=2, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=3, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=3, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=3, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=4, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=4, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=4, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=5, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=5, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=5, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=6, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=6, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=6, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=7, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=7, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=7, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=8, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=8, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=8, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=9, p={2147483584:0}] [L9] COND TRUE i < 10 VAL [alloca(10 * sizeof(char))={2147483584:0}, i=9, p={2147483584:0}] [L10] p[i] = __VERIFIER_nondet_char() VAL [__VERIFIER_nondet_char()=0, alloca(10 * sizeof(char))={2147483584:0}, i=9, p={2147483584:0}] [L9] i++ VAL [alloca(10 * sizeof(char))={2147483584:0}, i=10, p={2147483584:0}] [L9] COND FALSE !(i < 10) VAL [alloca(10 * sizeof(char))={2147483584:0}, i=10, p={2147483584:0}] [L13] EXPR p[2] VAL [alloca(10 * sizeof(char))={2147483584:0}, i=10, p={2147483584:0}, p[2]=97] [L13] COND TRUE p[2] == 'a' [L14] free(p) VAL [alloca(10 * sizeof(char))={2147483584:0}, i=10, p={2147483584:0}] [L14] free(p) VAL [alloca(10 * sizeof(char))={2147483584:0}, i=10, p={2147483584:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 8 error locations. Result: UNSAFE, OverallTime: 24.5s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 13.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 201 SDtfs, 486 SDslu, 544 SDs, 0 SdLazy, 725 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 443 GetRequests, 366 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 17.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=8, 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, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 269 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 416 ConstructedInterpolants, 1 QuantifiedInterpolants, 131941 SizeOfPredicates, 17 NumberOfNonLiveVariables, 482 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 20 InterpolantComputations, 12 PerfectInterpolantSequences, 512/866 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...