./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety-realloc/array-realloc-1.i --full-output --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 264dba86 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety-realloc/array-realloc-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 64bit --witnessprinter.graph.data.programhash ef75293aeb91e37969e4557310245e0c38a479cd --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-264dba8 [2019-11-21 11:20:06,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-21 11:20:06,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-21 11:20:06,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-21 11:20:06,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-21 11:20:06,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-21 11:20:06,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-21 11:20:06,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-21 11:20:06,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-21 11:20:06,421 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-21 11:20:06,422 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-21 11:20:06,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-21 11:20:06,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-21 11:20:06,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-21 11:20:06,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-21 11:20:06,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-21 11:20:06,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-21 11:20:06,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-21 11:20:06,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-21 11:20:06,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-21 11:20:06,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-21 11:20:06,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-21 11:20:06,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-21 11:20:06,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-21 11:20:06,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-21 11:20:06,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-21 11:20:06,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-21 11:20:06,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-21 11:20:06,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-21 11:20:06,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-21 11:20:06,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-21 11:20:06,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-21 11:20:06,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-21 11:20:06,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-21 11:20:06,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-21 11:20:06,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-21 11:20:06,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-21 11:20:06,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-21 11:20:06,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-21 11:20:06,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-21 11:20:06,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-21 11:20:06,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Bitvector.epf [2019-11-21 11:20:06,468 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-21 11:20:06,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-21 11:20:06,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-21 11:20:06,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-21 11:20:06,470 INFO L138 SettingsManager]: * Use SBE=true [2019-11-21 11:20:06,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-21 11:20:06,470 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-21 11:20:06,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-21 11:20:06,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-21 11:20:06,471 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-21 11:20:06,471 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-21 11:20:06,471 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-21 11:20:06,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-21 11:20:06,472 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-21 11:20:06,472 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-21 11:20:06,472 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-21 11:20:06,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-21 11:20:06,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-21 11:20:06,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-21 11:20:06,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-21 11:20:06,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-21 11:20:06,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-21 11:20:06,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-21 11:20:06,474 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-21 11:20:06,474 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-21 11:20:06,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-21 11:20:06,475 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef75293aeb91e37969e4557310245e0c38a479cd Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2019-11-21 11:20:06,798 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-21 11:20:06,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-21 11:20:06,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-21 11:20:06,824 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-21 11:20:06,825 INFO L275 PluginConnector]: CDTParser initialized [2019-11-21 11:20:06,826 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety-realloc/array-realloc-1.i [2019-11-21 11:20:06,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d40968dc/bbe7cc3bb2574bda89cf022e1c84d9c7/FLAGb3197a6bc [2019-11-21 11:20:07,392 INFO L306 CDTParser]: Found 1 translation units. [2019-11-21 11:20:07,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety-realloc/array-realloc-1.i [2019-11-21 11:20:07,410 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d40968dc/bbe7cc3bb2574bda89cf022e1c84d9c7/FLAGb3197a6bc [2019-11-21 11:20:07,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d40968dc/bbe7cc3bb2574bda89cf022e1c84d9c7 [2019-11-21 11:20:07,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-21 11:20:07,703 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-21 11:20:07,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-21 11:20:07,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-21 11:20:07,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-21 11:20:07,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 11:20:07" (1/1) ... [2019-11-21 11:20:07,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112358cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:07, skipping insertion in model container [2019-11-21 11:20:07,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 11:20:07" (1/1) ... [2019-11-21 11:20:07,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-21 11:20:07,768 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-21 11:20:08,217 INFO L966 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-21 11:20:08,218 INFO L969 CHandler]: at location: C: (int *)arg [515] [2019-11-21 11:20:08,218 INFO L970 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-21 11:20:08,232 INFO L966 CHandler]: Found a cast between two array/pointer types where the value type is smaller than the cast-to type, and where that value type is smaller than our current memory model resolution [2019-11-21 11:20:08,233 INFO L969 CHandler]: at location: C: (int *)malloc(sizeof(int)) [532] [2019-11-21 11:20:08,233 INFO L970 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-21 11:20:08,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-21 11:20:08,251 INFO L198 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2019-11-21 11:20:08,264 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-21 11:20:08,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-21 11:20:08,337 INFO L201 MainTranslator]: Completed pre-run [2019-11-21 11:20:08,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-21 11:20:08,429 INFO L205 MainTranslator]: Completed translation [2019-11-21 11:20:08,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08 WrapperNode [2019-11-21 11:20:08,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-21 11:20:08,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-21 11:20:08,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-21 11:20:08,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-21 11:20:08,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... [2019-11-21 11:20:08,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... [2019-11-21 11:20:08,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... [2019-11-21 11:20:08,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... [2019-11-21 11:20:08,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... [2019-11-21 11:20:08,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... [2019-11-21 11:20:08,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... [2019-11-21 11:20:08,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-21 11:20:08,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-21 11:20:08,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-21 11:20:08,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-21 11:20:08,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:08,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-21 11:20:08,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-21 11:20:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-21 11:20:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-21 11:20:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-21 11:20:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-21 11:20:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-21 11:20:08,588 INFO L138 BoogieDeclarations]: Found implementation of procedure expandArray [2019-11-21 11:20:08,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-21 11:20:08,589 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_realloc [2019-11-21 11:20:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-21 11:20:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-21 11:20:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-21 11:20:08,589 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-21 11:20:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-21 11:20:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-21 11:20:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-21 11:20:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-21 11:20:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-21 11:20:08,590 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-21 11:20:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-21 11:20:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-21 11:20:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-21 11:20:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-21 11:20:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-21 11:20:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-21 11:20:08,591 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-21 11:20:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-21 11:20:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-21 11:20:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-21 11:20:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-21 11:20:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-21 11:20:08,592 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-21 11:20:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-21 11:20:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-21 11:20:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-21 11:20:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-21 11:20:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-21 11:20:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-21 11:20:08,593 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-21 11:20:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-21 11:20:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-21 11:20:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-21 11:20:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-21 11:20:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-21 11:20:08,594 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-21 11:20:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-21 11:20:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-21 11:20:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-21 11:20:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-21 11:20:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-21 11:20:08,595 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-21 11:20:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-21 11:20:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-21 11:20:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-21 11:20:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-21 11:20:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-21 11:20:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-21 11:20:08,596 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-21 11:20:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-21 11:20:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-21 11:20:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-21 11:20:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-21 11:20:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-21 11:20:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-21 11:20:08,597 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-21 11:20:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-21 11:20:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-21 11:20:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-21 11:20:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-21 11:20:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-21 11:20:08,598 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-21 11:20:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-21 11:20:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-21 11:20:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-21 11:20:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-21 11:20:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-21 11:20:08,599 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-21 11:20:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-21 11:20:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-21 11:20:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-21 11:20:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-21 11:20:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-21 11:20:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-21 11:20:08,600 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-21 11:20:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-21 11:20:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-21 11:20:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-21 11:20:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-21 11:20:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-21 11:20:08,601 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-21 11:20:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-21 11:20:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-21 11:20:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-21 11:20:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-21 11:20:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-21 11:20:08,602 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-21 11:20:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-21 11:20:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-21 11:20:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-21 11:20:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-21 11:20:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-21 11:20:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-21 11:20:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-21 11:20:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-21 11:20:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-21 11:20:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-21 11:20:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-21 11:20:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-21 11:20:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-21 11:20:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-21 11:20:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-21 11:20:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-21 11:20:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-21 11:20:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-21 11:20:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-21 11:20:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-21 11:20:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-21 11:20:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure expandArray [2019-11-21 11:20:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_realloc [2019-11-21 11:20:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-21 11:20:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-21 11:20:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-21 11:20:08,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-21 11:20:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-21 11:20:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-21 11:20:08,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-21 11:20:09,187 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-21 11:20:09,187 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-21 11:20:09,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 11:20:09 BoogieIcfgContainer [2019-11-21 11:20:09,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-21 11:20:09,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-21 11:20:09,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-21 11:20:09,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-21 11:20:09,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 11:20:07" (1/3) ... [2019-11-21 11:20:09,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c10d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 11:20:09, skipping insertion in model container [2019-11-21 11:20:09,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 11:20:08" (2/3) ... [2019-11-21 11:20:09,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c10d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 11:20:09, skipping insertion in model container [2019-11-21 11:20:09,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 11:20:09" (3/3) ... [2019-11-21 11:20:09,198 INFO L109 eAbstractionObserver]: Analyzing ICFG array-realloc-1.i [2019-11-21 11:20:09,208 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-21 11:20:09,216 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2019-11-21 11:20:09,228 INFO L249 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2019-11-21 11:20:09,249 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-21 11:20:09,249 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-21 11:20:09,249 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-21 11:20:09,250 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-21 11:20:09,250 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-21 11:20:09,250 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-21 11:20:09,250 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-21 11:20:09,251 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-21 11:20:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-11-21 11:20:09,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-21 11:20:09,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:09,278 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:09,278 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:09,285 INFO L82 PathProgramCache]: Analyzing trace with hash -908251633, now seen corresponding path program 1 times [2019-11-21 11:20:09,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:09,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [985356057] [2019-11-21 11:20:09,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:09,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-21 11:20:09,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:09,548 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:09,561 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [985356057] [2019-11-21 11:20:09,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:09,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-21 11:20:09,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810272865] [2019-11-21 11:20:09,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-21 11:20:09,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-21 11:20:09,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-21 11:20:09,586 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2019-11-21 11:20:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:09,706 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2019-11-21 11:20:09,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-21 11:20:09,708 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-21 11:20:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:09,722 INFO L225 Difference]: With dead ends: 55 [2019-11-21 11:20:09,722 INFO L226 Difference]: Without dead ends: 51 [2019-11-21 11:20:09,724 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 [2019-11-21 11:20:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-21 11:20:09,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2019-11-21 11:20:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-21 11:20:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-11-21 11:20:09,805 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 8 [2019-11-21 11:20:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:09,807 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-11-21 11:20:09,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-21 11:20:09,807 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-11-21 11:20:09,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-21 11:20:09,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:09,808 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:10,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:10,012 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1908971100, now seen corresponding path program 1 times [2019-11-21 11:20:10,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:10,015 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [396299372] [2019-11-21 11:20:10,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:10,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-21 11:20:10,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:10,238 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:10,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396299372] [2019-11-21 11:20:10,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:10,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-21 11:20:10,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404480664] [2019-11-21 11:20:10,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-21 11:20:10,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:10,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-21 11:20:10,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-21 11:20:10,251 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 3 states. [2019-11-21 11:20:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:10,266 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-21 11:20:10,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-21 11:20:10,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-21 11:20:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:10,268 INFO L225 Difference]: With dead ends: 39 [2019-11-21 11:20:10,268 INFO L226 Difference]: Without dead ends: 39 [2019-11-21 11:20:10,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-21 11:20:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-21 11:20:10,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-21 11:20:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-21 11:20:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-21 11:20:10,276 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 9 [2019-11-21 11:20:10,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:10,276 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-21 11:20:10,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-21 11:20:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-21 11:20:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-21 11:20:10,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:10,277 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:10,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:10,488 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1734096500, now seen corresponding path program 1 times [2019-11-21 11:20:10,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:10,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [111275847] [2019-11-21 11:20:10,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:10,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-21 11:20:10,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:10,670 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:10,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [111275847] [2019-11-21 11:20:10,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:10,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-21 11:20:10,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305929465] [2019-11-21 11:20:10,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-21 11:20:10,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:10,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-21 11:20:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-21 11:20:10,684 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 3 states. [2019-11-21 11:20:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:10,764 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2019-11-21 11:20:10,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-21 11:20:10,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-21 11:20:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:10,767 INFO L225 Difference]: With dead ends: 46 [2019-11-21 11:20:10,767 INFO L226 Difference]: Without dead ends: 46 [2019-11-21 11:20:10,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-21 11:20:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-21 11:20:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-11-21 11:20:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-21 11:20:10,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-11-21 11:20:10,787 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 13 [2019-11-21 11:20:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:10,788 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-11-21 11:20:10,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-21 11:20:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-11-21 11:20:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-21 11:20:10,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:10,791 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:10,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:10,992 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:10,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:10,993 INFO L82 PathProgramCache]: Analyzing trace with hash 845926542, now seen corresponding path program 1 times [2019-11-21 11:20:10,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:10,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [58541920] [2019-11-21 11:20:10,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:11,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-21 11:20:11,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:11,233 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:11,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [58541920] [2019-11-21 11:20:11,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:11,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-21 11:20:11,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728223997] [2019-11-21 11:20:11,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-21 11:20:11,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:11,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-21 11:20:11,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-21 11:20:11,266 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2019-11-21 11:20:11,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:11,366 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-11-21 11:20:11,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-21 11:20:11,367 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-21 11:20:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:11,368 INFO L225 Difference]: With dead ends: 52 [2019-11-21 11:20:11,369 INFO L226 Difference]: Without dead ends: 52 [2019-11-21 11:20:11,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-21 11:20:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-21 11:20:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2019-11-21 11:20:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-21 11:20:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-21 11:20:11,381 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2019-11-21 11:20:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:11,382 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-21 11:20:11,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-21 11:20:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-21 11:20:11,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-21 11:20:11,384 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:11,385 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:11,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:11,588 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:11,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:11,589 INFO L82 PathProgramCache]: Analyzing trace with hash 846850063, now seen corresponding path program 1 times [2019-11-21 11:20:11,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:11,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1152054971] [2019-11-21 11:20:11,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:11,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-21 11:20:11,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:11,869 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-21 11:20:11,870 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-21 11:20:11,871 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-21 11:20:11,895 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-21 11:20:11,896 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-21 11:20:11,896 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:5 [2019-11-21 11:20:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:11,921 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:11,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1152054971] [2019-11-21 11:20:11,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:11,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-21 11:20:11,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055707942] [2019-11-21 11:20:11,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-21 11:20:11,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:11,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-21 11:20:11,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-21 11:20:11,960 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 5 states. [2019-11-21 11:20:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:12,080 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-11-21 11:20:12,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-21 11:20:12,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-21 11:20:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:12,082 INFO L225 Difference]: With dead ends: 45 [2019-11-21 11:20:12,082 INFO L226 Difference]: Without dead ends: 45 [2019-11-21 11:20:12,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-21 11:20:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-21 11:20:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-11-21 11:20:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-21 11:20:12,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-21 11:20:12,090 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2019-11-21 11:20:12,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:12,090 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-21 11:20:12,091 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-21 11:20:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-21 11:20:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-21 11:20:12,091 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:12,092 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:12,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:12,296 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 846850064, now seen corresponding path program 1 times [2019-11-21 11:20:12,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:12,298 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1817587208] [2019-11-21 11:20:12,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:12,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-21 11:20:12,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:12,560 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 [2019-11-21 11:20:12,560 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-21 11:20:12,569 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-21 11:20:12,569 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-21 11:20:12,569 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-21 11:20:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:12,624 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:13,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:13,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1817587208] [2019-11-21 11:20:13,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:13,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-21 11:20:13,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682583979] [2019-11-21 11:20:13,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-21 11:20:13,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-21 11:20:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-21 11:20:13,112 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 12 states. [2019-11-21 11:20:13,716 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2019-11-21 11:20:13,959 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2019-11-21 11:20:14,140 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2019-11-21 11:20:14,424 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2019-11-21 11:20:14,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:14,926 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2019-11-21 11:20:14,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-21 11:20:14,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-21 11:20:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:14,930 INFO L225 Difference]: With dead ends: 121 [2019-11-21 11:20:14,930 INFO L226 Difference]: Without dead ends: 119 [2019-11-21 11:20:14,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2019-11-21 11:20:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-21 11:20:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 63. [2019-11-21 11:20:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-21 11:20:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2019-11-21 11:20:14,941 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 17 [2019-11-21 11:20:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:14,942 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2019-11-21 11:20:14,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-21 11:20:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2019-11-21 11:20:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-21 11:20:14,943 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:14,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:15,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:15,157 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1248859977, now seen corresponding path program 1 times [2019-11-21 11:20:15,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:15,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2147300751] [2019-11-21 11:20:15,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:15,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-21 11:20:15,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:15,314 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:15,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2147300751] [2019-11-21 11:20:15,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:15,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-21 11:20:15,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697364184] [2019-11-21 11:20:15,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-21 11:20:15,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-21 11:20:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-21 11:20:15,328 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 3 states. [2019-11-21 11:20:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:15,338 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-21 11:20:15,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-21 11:20:15,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-21 11:20:15,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:15,344 INFO L225 Difference]: With dead ends: 62 [2019-11-21 11:20:15,344 INFO L226 Difference]: Without dead ends: 62 [2019-11-21 11:20:15,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-21 11:20:15,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-21 11:20:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-21 11:20:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-21 11:20:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-11-21 11:20:15,358 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 17 [2019-11-21 11:20:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:15,359 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-11-21 11:20:15,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-21 11:20:15,361 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-11-21 11:20:15,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-21 11:20:15,362 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:15,362 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:15,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:15,563 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:15,563 INFO L82 PathProgramCache]: Analyzing trace with hash -59953566, now seen corresponding path program 1 times [2019-11-21 11:20:15,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:15,564 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [314898991] [2019-11-21 11:20:15,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:15,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-21 11:20:15,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:15,841 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:15,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [314898991] [2019-11-21 11:20:15,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:15,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-11-21 11:20:15,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935306590] [2019-11-21 11:20:15,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-21 11:20:15,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:15,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-21 11:20:15,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-21 11:20:15,926 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 10 states. [2019-11-21 11:20:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:16,096 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-11-21 11:20:16,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-21 11:20:16,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-21 11:20:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:16,098 INFO L225 Difference]: With dead ends: 61 [2019-11-21 11:20:16,099 INFO L226 Difference]: Without dead ends: 61 [2019-11-21 11:20:16,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-21 11:20:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-21 11:20:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-21 11:20:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-21 11:20:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2019-11-21 11:20:16,105 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 18 [2019-11-21 11:20:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:16,105 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2019-11-21 11:20:16,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-21 11:20:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2019-11-21 11:20:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-21 11:20:16,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:16,106 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:16,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:16,309 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1879296432, now seen corresponding path program 1 times [2019-11-21 11:20:16,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:16,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1905791034] [2019-11-21 11:20:16,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:16,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-21 11:20:16,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:16,574 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:16,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1905791034] [2019-11-21 11:20:16,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:16,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2019-11-21 11:20:16,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589218795] [2019-11-21 11:20:16,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-21 11:20:16,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:16,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-21 11:20:16,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-21 11:20:16,652 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand 9 states. [2019-11-21 11:20:16,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:16,807 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2019-11-21 11:20:16,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-21 11:20:16,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-11-21 11:20:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:16,810 INFO L225 Difference]: With dead ends: 60 [2019-11-21 11:20:16,810 INFO L226 Difference]: Without dead ends: 60 [2019-11-21 11:20:16,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-21 11:20:16,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-21 11:20:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-21 11:20:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-21 11:20:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2019-11-21 11:20:16,816 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 22 [2019-11-21 11:20:16,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:16,816 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2019-11-21 11:20:16,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-21 11:20:16,816 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2019-11-21 11:20:16,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-21 11:20:16,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:16,817 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:17,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:17,021 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2045618873, now seen corresponding path program 1 times [2019-11-21 11:20:17,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:17,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [544539295] [2019-11-21 11:20:17,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:17,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:17,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-21 11:20:17,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:17,219 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:17,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-21 11:20:17,266 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [544539295] [2019-11-21 11:20:17,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:17,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-21 11:20:17,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139061662] [2019-11-21 11:20:17,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-21 11:20:17,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-21 11:20:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-21 11:20:17,267 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand 5 states. [2019-11-21 11:20:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:17,318 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-11-21 11:20:17,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-21 11:20:17,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-11-21 11:20:17,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:17,320 INFO L225 Difference]: With dead ends: 60 [2019-11-21 11:20:17,320 INFO L226 Difference]: Without dead ends: 60 [2019-11-21 11:20:17,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-21 11:20:17,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-21 11:20:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-21 11:20:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-21 11:20:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2019-11-21 11:20:17,326 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 26 [2019-11-21 11:20:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:17,326 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2019-11-21 11:20:17,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-21 11:20:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2019-11-21 11:20:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-21 11:20:17,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:17,327 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:17,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:17,530 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1774578561, now seen corresponding path program 1 times [2019-11-21 11:20:17,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:17,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1359153258] [2019-11-21 11:20:17,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-21 11:20:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:17,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-21 11:20:17,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-21 11:20:17,754 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-21 11:20:17,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1359153258] [2019-11-21 11:20:17,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-21 11:20:17,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-21 11:20:17,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305588600] [2019-11-21 11:20:17,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-21 11:20:17,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-21 11:20:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-21 11:20:17,797 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 7 states. [2019-11-21 11:20:17,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:17,937 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2019-11-21 11:20:17,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-21 11:20:17,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-21 11:20:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:17,939 INFO L225 Difference]: With dead ends: 66 [2019-11-21 11:20:17,940 INFO L226 Difference]: Without dead ends: 60 [2019-11-21 11:20:17,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-21 11:20:17,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-21 11:20:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-21 11:20:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-21 11:20:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-21 11:20:17,946 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 29 [2019-11-21 11:20:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:17,946 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-21 11:20:17,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-21 11:20:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-21 11:20:17,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-21 11:20:17,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:17,948 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:18,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:18,149 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:18,149 INFO L82 PathProgramCache]: Analyzing trace with hash -32875902, now seen corresponding path program 1 times [2019-11-21 11:20:18,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:18,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [524881885] [2019-11-21 11:20:18,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:18,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-21 11:20:18,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-21 11:20:18,388 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-21 11:20:18,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [524881885] [2019-11-21 11:20:18,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:18,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-21 11:20:18,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68202206] [2019-11-21 11:20:18,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-21 11:20:18,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:18,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-21 11:20:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-21 11:20:18,418 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 5 states. [2019-11-21 11:20:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:18,465 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-21 11:20:18,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-21 11:20:18,466 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-21 11:20:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:18,467 INFO L225 Difference]: With dead ends: 59 [2019-11-21 11:20:18,467 INFO L226 Difference]: Without dead ends: 59 [2019-11-21 11:20:18,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-21 11:20:18,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-21 11:20:18,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-21 11:20:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-21 11:20:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-21 11:20:18,472 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 29 [2019-11-21 11:20:18,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:18,472 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-21 11:20:18,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-21 11:20:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-21 11:20:18,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-21 11:20:18,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:18,474 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:18,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:18,679 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1438678298, now seen corresponding path program 1 times [2019-11-21 11:20:18,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:18,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [404268753] [2019-11-21 11:20:18,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:18,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-21 11:20:18,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-21 11:20:18,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-21 11:20:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-21 11:20:18,972 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-21 11:20:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-21 11:20:19,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [404268753] [2019-11-21 11:20:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-21 11:20:19,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 4 [2019-11-21 11:20:19,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633728970] [2019-11-21 11:20:19,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-21 11:20:19,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-21 11:20:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-21 11:20:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-21 11:20:19,008 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 5 states. [2019-11-21 11:20:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-21 11:20:19,071 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-21 11:20:19,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-21 11:20:19,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-21 11:20:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-21 11:20:19,073 INFO L225 Difference]: With dead ends: 56 [2019-11-21 11:20:19,073 INFO L226 Difference]: Without dead ends: 56 [2019-11-21 11:20:19,073 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-21 11:20:19,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-21 11:20:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-21 11:20:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-21 11:20:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-21 11:20:19,078 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 29 [2019-11-21 11:20:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-21 11:20:19,078 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-21 11:20:19,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-21 11:20:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-21 11:20:19,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-21 11:20:19,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-21 11:20:19,079 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-21 11:20:19,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:19,283 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ENSURES_VIOLATIONMEMORY_LEAK, mainErr1ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr4ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr3ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr2ASSERT_VIOLATIONMEMORY_FREE, expandArrayErr1REQUIRES_VIOLATION, expandArrayErr0REQUIRES_VIOLATION]=== [2019-11-21 11:20:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-21 11:20:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1649354337, now seen corresponding path program 1 times [2019-11-21 11:20:19,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-21 11:20:19,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1681162770] [2019-11-21 11:20:19,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-21 11:20:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-21 11:20:19,636 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-21 11:20:19,636 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-21 11:20:19,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-21 11:20:19,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 11:20:19 BoogieIcfgContainer [2019-11-21 11:20:19,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-21 11:20:19,901 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-21 11:20:19,901 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-21 11:20:19,902 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-21 11:20:19,902 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 11:20:09" (3/4) ... [2019-11-21 11:20:19,905 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-21 11:20:19,971 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-21 11:20:19,971 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-21 11:20:19,973 INFO L168 Benchmark]: Toolchain (without parser) took 12269.91 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 293.1 MB). Free memory was 955.0 MB in the beginning and 1.2 GB in the end (delta: -260.2 MB). Peak memory consumption was 32.9 MB. Max. memory is 11.5 GB. [2019-11-21 11:20:19,973 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-21 11:20:19,974 INFO L168 Benchmark]: CACSL2BoogieTranslator took 726.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -122.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-21 11:20:19,975 INFO L168 Benchmark]: Boogie Preprocessor took 100.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. [2019-11-21 11:20:19,975 INFO L168 Benchmark]: RCFGBuilder took 657.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 11.5 GB. [2019-11-21 11:20:19,976 INFO L168 Benchmark]: TraceAbstraction took 10710.88 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 184.0 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -199.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-21 11:20:19,976 INFO L168 Benchmark]: Witness Printer took 70.04 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 11.5 GB. [2019-11-21 11:20:19,979 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 726.03 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 109.1 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -122.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 100.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.9 MB). Peak memory consumption was 6.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 657.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 45.8 MB). Peak memory consumption was 45.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10710.88 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 184.0 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -199.3 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 70.04 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 538]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L512] int num; [L513] int ind, newsize, i = 1; VAL [\old(i)=0, \old(ind)=0, \old(newsize)=0, \old(num)=0, i=1, ind=0, newsize=0, num=0] [L528] num = __VERIFIER_nondet_int() [L529] COND FALSE !(!(num > 0 && num < 100)) [L532] int *a = (int *)malloc(sizeof(int)); VAL [\old(argc)=0, \old(newsize)=0, \old(num)=0, a={2:0}, argc=0, argv={0:0}, argv={0:0}, i=1, ind=0, malloc(sizeof(int))={2:0}, newsize=0, num=1] [L533] COND FALSE !(a == ((void *)0)) [L536] newsize = 0 VAL [\old(argc)=0, \old(newsize)=0, \old(num)=0, a={2:0}, argc=0, argv={0:0}, argv={0:0}, i=1, ind=0, malloc(sizeof(int))={2:0}, newsize=0, num=1] [L537] CALL expandArray(a) VAL [\old(newsize)=0, \old(num)=0, arg={2:0}, i=1, ind=0, newsize=0, num=1] [L515] int *a = (int *)arg; [L516] int *b = ((void *)0); VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={0:0}, i=1, ind=0, newsize=0, num=1] [L517] COND TRUE newsize < num [L518] newsize = newsize + 1 VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={0:0}, i=1, ind=0, newsize=1, num=1] [L519] EXPR, FCALL realloc(a, sizeof(int) * newsize) VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={0:0}, i=1, ind=0, newsize=1, num=1, realloc(a, sizeof(int) * newsize)={2:0}] [L519] b = realloc(a, sizeof(int) * newsize) [L520] b[newsize - 1] = i VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={2:0}, i=1, ind=0, newsize=1, num=1] [L521] a = b VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={2:0}, i=1, ind=0, newsize=1, num=1] [L517] COND FALSE !(newsize < num) VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={2:0}, i=1, ind=0, newsize=1, num=1] [L523] COND TRUE b != ((void *)0) VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={2:0}, i=1, ind=0, newsize=1, num=1] [L524] free(b) VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={2:0}, i=1, ind=0, newsize=1, num=1] [L524] free(b) VAL [\old(newsize)=0, \old(num)=0, a={2:0}, arg={2:0}, arg={2:0}, b={2:0}, i=1, ind=0, newsize=1, num=1] [L524] free(b) [L525] return 0; VAL [\old(newsize)=0, \old(num)=0, \result={0:0}, a={2:0}, arg={2:0}, arg={2:0}, b={2:0}, i=1, ind=0, newsize=1, num=1] [L537] RET expandArray(a) VAL [\old(argc)=0, \old(newsize)=0, \old(num)=0, a={2:0}, argc=0, argv={0:0}, argv={0:0}, expandArray(a)={0:0}, i=1, ind=0, malloc(sizeof(int))={2:0}, newsize=1, num=1] [L538] free(a) VAL [\old(argc)=0, \old(newsize)=0, \old(num)=0, a={2:0}, argc=0, argv={0:0}, argv={0:0}, i=1, ind=0, malloc(sizeof(int))={2:0}, newsize=1, num=1] [L538] free(a) VAL [\old(argc)=0, \old(newsize)=0, \old(num)=0, a={2:0}, argc=0, argv={0:0}, argv={0:0}, i=1, ind=0, malloc(sizeof(int))={2:0}, newsize=1, num=1] [L538] free(a) VAL [\old(argc)=0, \old(newsize)=0, \old(num)=0, a={2:0}, argc=0, argv={0:0}, argv={0:0}, i=1, ind=0, malloc(sizeof(int))={2:0}, newsize=1, num=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 57 locations, 9 error locations. Result: UNSAFE, OverallTime: 10.6s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 439 SDtfs, 407 SDslu, 903 SDs, 0 SdLazy, 551 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 506 GetRequests, 439 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 86 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 281 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 476 ConstructedInterpolants, 0 QuantifiedInterpolants, 26039 SizeOfPredicates, 15 NumberOfNonLiveVariables, 1269 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 26 InterpolantComputations, 24 PerfectInterpolantSequences, 42/46 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...