./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e9fb52f5a8769e751d5dc39d93dc642433ae2f5b ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:19:44,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:19:44,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:19:45,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:19:45,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:19:45,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:19:45,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:19:45,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:19:45,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:19:45,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:19:45,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:19:45,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:19:45,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:19:45,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:19:45,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:19:45,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:19:45,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:19:45,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:19:45,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:19:45,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:19:45,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:19:45,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:19:45,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:19:45,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:19:45,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:19:45,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:19:45,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:19:45,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:19:45,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:19:45,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:19:45,055 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:19:45,056 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:19:45,056 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:19:45,057 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:19:45,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:19:45,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:19:45,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:19:45,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:19:45,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:19:45,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:19:45,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:19:45,061 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:19:45,084 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:19:45,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:19:45,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:19:45,085 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:19:45,085 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:19:45,085 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:19:45,086 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:19:45,086 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:19:45,086 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:19:45,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:19:45,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:19:45,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:19:45,087 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:19:45,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:19:45,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:19:45,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:19:45,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:19:45,088 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:19:45,088 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:19:45,088 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:19:45,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:19:45,088 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:19:45,089 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:19:45,089 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:19:45,089 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:19:45,089 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:19:45,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:19:45,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:19:45,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:19:45,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:19:45,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:19:45,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:19:45,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:19:45,091 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:19:45,091 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:19:45,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:19:45,091 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9fb52f5a8769e751d5dc39d93dc642433ae2f5b [2019-11-26 02:19:45,262 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:19:45,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:19:45,279 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:19:45,281 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:19:45,281 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:19:45,282 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2019-11-26 02:19:45,335 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/data/1649d5b75/acffdb61f635414aa30e7d9f4a8b8586/FLAG583a22b92 [2019-11-26 02:19:45,745 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:19:45,746 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2019-11-26 02:19:45,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/data/1649d5b75/acffdb61f635414aa30e7d9f4a8b8586/FLAG583a22b92 [2019-11-26 02:19:46,067 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/data/1649d5b75/acffdb61f635414aa30e7d9f4a8b8586 [2019-11-26 02:19:46,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:19:46,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:19:46,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:19:46,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:19:46,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:19:46,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c300b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46, skipping insertion in model container [2019-11-26 02:19:46,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:19:46,142 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:19:46,493 INFO L965 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 [2019-11-26 02:19:46,493 INFO L968 CHandler]: at location: C: (struct ldv_msg*)ldv_malloc(sizeof(struct ldv_msg)) [576] [2019-11-26 02:19:46,494 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:19:46,505 INFO L965 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 [2019-11-26 02:19:46,506 INFO L968 CHandler]: at location: C: (typeof(*msg) *)( (char *)__mptr - ((size_t) &((typeof(*msg) *)0)->list) ) [607] [2019-11-26 02:19:46,506 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:19:46,508 INFO L965 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 [2019-11-26 02:19:46,508 INFO L968 CHandler]: at location: C: (typeof(*(msg)) *)( (char *)__mptr - ((size_t) &((typeof(*(msg)) *)0)->list) ) [607] [2019-11-26 02:19:46,509 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:19:46,511 INFO L965 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 [2019-11-26 02:19:46,511 INFO L968 CHandler]: at location: C: (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) ) [607] [2019-11-26 02:19:46,511 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:19:46,531 INFO L965 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 [2019-11-26 02:19:46,531 INFO L968 CHandler]: at location: C: (struct ldv_kobject *)( (char *)__mptr - ((size_t) &((struct ldv_kobject *)0)->kref) ) [706] [2019-11-26 02:19:46,532 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:19:46,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:19:46,559 INFO L198 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2019-11-26 02:19:46,568 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:19:46,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:19:46,614 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:19:46,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:19:46,769 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:19:46,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46 WrapperNode [2019-11-26 02:19:46,769 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:19:46,770 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:19:46,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:19:46,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:19:46,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:19:46,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:19:46,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:19:46,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:19:46,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... [2019-11-26 02:19:46,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:19:46,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:19:46,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:19:46,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:19:46,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:19:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:19:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:19:47,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:19:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:19:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:19:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:19:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:19:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-26 02:19:47,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:19:47,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:19:47,625 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:19:47,626 INFO L284 CfgBuilder]: Removed 42 assume(true) statements. [2019-11-26 02:19:47,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:47 BoogieIcfgContainer [2019-11-26 02:19:47,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:19:47,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:19:47,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:19:47,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:19:47,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:19:46" (1/3) ... [2019-11-26 02:19:47,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bd1052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:19:47, skipping insertion in model container [2019-11-26 02:19:47,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:19:46" (2/3) ... [2019-11-26 02:19:47,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bd1052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:19:47, skipping insertion in model container [2019-11-26 02:19:47,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:47" (3/3) ... [2019-11-26 02:19:47,633 INFO L109 eAbstractionObserver]: Analyzing ICFG memleaks_test22_4.i [2019-11-26 02:19:47,642 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:19:47,648 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2019-11-26 02:19:47,659 INFO L249 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2019-11-26 02:19:47,676 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:19:47,676 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:19:47,676 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:19:47,676 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:19:47,677 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:19:47,677 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:19:47,677 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:19:47,677 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:19:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2019-11-26 02:19:47,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:19:47,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:47,699 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:19:47,699 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash 889508776, now seen corresponding path program 1 times [2019-11-26 02:19:47,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:47,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1003938302] [2019-11-26 02:19:47,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:47,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:19:47,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:47,909 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 [2019-11-26 02:19:47,910 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:47,916 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:47,916 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:47,916 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:19:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:47,939 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:47,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:47,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1003938302] [2019-11-26 02:19:47,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:47,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:19:47,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869121339] [2019-11-26 02:19:47,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:19:47,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:47,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:19:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:47,964 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 5 states. [2019-11-26 02:19:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:48,501 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2019-11-26 02:19:48,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:19:48,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-26 02:19:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:48,514 INFO L225 Difference]: With dead ends: 216 [2019-11-26 02:19:48,514 INFO L226 Difference]: Without dead ends: 208 [2019-11-26 02:19:48,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:19:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-26 02:19:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 74. [2019-11-26 02:19:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-26 02:19:48,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-11-26 02:19:48,570 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 6 [2019-11-26 02:19:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:48,571 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-11-26 02:19:48,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:19:48,571 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-11-26 02:19:48,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:19:48,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:48,572 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:19:48,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:48,783 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:48,784 INFO L82 PathProgramCache]: Analyzing trace with hash 889568358, now seen corresponding path program 1 times [2019-11-26 02:19:48,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:48,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1690575869] [2019-11-26 02:19:48,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:48,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:48,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:19:48,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:48,919 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:48,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1690575869] [2019-11-26 02:19:48,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:48,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:19:48,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487661859] [2019-11-26 02:19:48,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:19:48,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:19:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:19:48,925 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 4 states. [2019-11-26 02:19:48,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:48,972 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2019-11-26 02:19:48,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:19:48,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:19:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:48,974 INFO L225 Difference]: With dead ends: 166 [2019-11-26 02:19:48,974 INFO L226 Difference]: Without dead ends: 166 [2019-11-26 02:19:48,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:48,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-11-26 02:19:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 72. [2019-11-26 02:19:48,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-26 02:19:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2019-11-26 02:19:48,984 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 6 [2019-11-26 02:19:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:48,985 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2019-11-26 02:19:48,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:19:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2019-11-26 02:19:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:19:48,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:48,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:49,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:49,196 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968328, now seen corresponding path program 1 times [2019-11-26 02:19:49,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:49,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [76785463] [2019-11-26 02:19:49,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:49,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:19:49,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:49,341 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 [2019-11-26 02:19:49,341 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:49,347 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:49,347 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:49,347 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:19:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:49,396 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:49,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [76785463] [2019-11-26 02:19:49,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:49,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-26 02:19:49,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014489791] [2019-11-26 02:19:49,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:19:49,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:19:49,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:19:49,584 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2019-11-26 02:19:50,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:50,089 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2019-11-26 02:19:50,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:19:50,094 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-11-26 02:19:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:50,096 INFO L225 Difference]: With dead ends: 165 [2019-11-26 02:19:50,096 INFO L226 Difference]: Without dead ends: 165 [2019-11-26 02:19:50,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:19:50,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-26 02:19:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 71. [2019-11-26 02:19:50,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-26 02:19:50,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2019-11-26 02:19:50,105 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 7 [2019-11-26 02:19:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:50,105 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2019-11-26 02:19:50,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:19:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2019-11-26 02:19:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:19:50,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:50,106 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:50,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:50,309 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:50,310 INFO L82 PathProgramCache]: Analyzing trace with hash 119421555, now seen corresponding path program 1 times [2019-11-26 02:19:50,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:50,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [615613124] [2019-11-26 02:19:50,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:50,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:19:50,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:50,437 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:50,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615613124] [2019-11-26 02:19:50,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:50,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:19:50,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635713941] [2019-11-26 02:19:50,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:19:50,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:50,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:19:50,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:19:50,440 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 4 states. [2019-11-26 02:19:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:50,469 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2019-11-26 02:19:50,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:19:50,470 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:19:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:50,471 INFO L225 Difference]: With dead ends: 118 [2019-11-26 02:19:50,471 INFO L226 Difference]: Without dead ends: 118 [2019-11-26 02:19:50,471 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:50,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-26 02:19:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2019-11-26 02:19:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-26 02:19:50,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2019-11-26 02:19:50,476 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 8 [2019-11-26 02:19:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:50,477 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2019-11-26 02:19:50,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:19:50,477 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2019-11-26 02:19:50,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:19:50,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:50,478 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:50,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:50,680 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:50,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:50,681 INFO L82 PathProgramCache]: Analyzing trace with hash 176679857, now seen corresponding path program 1 times [2019-11-26 02:19:50,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:50,682 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [484461050] [2019-11-26 02:19:50,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:50,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:19:50,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:50,818 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:50,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [484461050] [2019-11-26 02:19:50,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:50,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:19:50,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196931876] [2019-11-26 02:19:50,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:19:50,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:19:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:19:50,824 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 4 states. [2019-11-26 02:19:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:50,857 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2019-11-26 02:19:50,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:19:50,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:19:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:50,863 INFO L225 Difference]: With dead ends: 145 [2019-11-26 02:19:50,864 INFO L226 Difference]: Without dead ends: 145 [2019-11-26 02:19:50,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-26 02:19:50,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 73. [2019-11-26 02:19:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-26 02:19:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-11-26 02:19:50,869 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 8 [2019-11-26 02:19:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:50,869 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-11-26 02:19:50,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:19:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-11-26 02:19:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:19:50,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:50,870 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:51,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:51,073 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash 820865718, now seen corresponding path program 1 times [2019-11-26 02:19:51,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:51,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1632333545] [2019-11-26 02:19:51,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:51,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:19:51,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:51,199 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:51,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1632333545] [2019-11-26 02:19:51,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:51,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-26 02:19:51,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481884834] [2019-11-26 02:19:51,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:19:51,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:51,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:19:51,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:19:51,215 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 6 states. [2019-11-26 02:19:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:51,249 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2019-11-26 02:19:51,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:19:51,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-26 02:19:51,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:51,251 INFO L225 Difference]: With dead ends: 111 [2019-11-26 02:19:51,251 INFO L226 Difference]: Without dead ends: 111 [2019-11-26 02:19:51,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:19:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-26 02:19:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2019-11-26 02:19:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-26 02:19:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2019-11-26 02:19:51,257 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 12 [2019-11-26 02:19:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:51,257 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2019-11-26 02:19:51,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:19:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2019-11-26 02:19:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:19:51,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:51,258 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:51,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:51,458 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2137107767, now seen corresponding path program 1 times [2019-11-26 02:19:51,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:51,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [719871928] [2019-11-26 02:19:51,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:51,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-26 02:19:51,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:51,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:51,577 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:51,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [719871928] [2019-11-26 02:19:51,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:51,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:19:51,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540802669] [2019-11-26 02:19:51,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:19:51,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:51,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:19:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:19:51,580 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand 3 states. [2019-11-26 02:19:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:51,660 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2019-11-26 02:19:51,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:19:51,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-26 02:19:51,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:51,661 INFO L225 Difference]: With dead ends: 102 [2019-11-26 02:19:51,661 INFO L226 Difference]: Without dead ends: 99 [2019-11-26 02:19:51,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:19:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-26 02:19:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2019-11-26 02:19:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-26 02:19:51,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2019-11-26 02:19:51,665 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 12 [2019-11-26 02:19:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:51,666 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2019-11-26 02:19:51,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:19:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2019-11-26 02:19:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:19:51,667 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:51,667 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:51,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:51,868 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:51,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:51,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2137106293, now seen corresponding path program 1 times [2019-11-26 02:19:51,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:51,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [681773646] [2019-11-26 02:19:51,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:52,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:19:52,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:52,046 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:52,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [681773646] [2019-11-26 02:19:52,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:52,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:19:52,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851631842] [2019-11-26 02:19:52,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:19:52,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:52,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:19:52,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:52,051 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 5 states. [2019-11-26 02:19:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:52,108 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2019-11-26 02:19:52,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:19:52,109 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-26 02:19:52,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:52,109 INFO L225 Difference]: With dead ends: 81 [2019-11-26 02:19:52,109 INFO L226 Difference]: Without dead ends: 73 [2019-11-26 02:19:52,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:19:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-26 02:19:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-11-26 02:19:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-26 02:19:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2019-11-26 02:19:52,114 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 12 [2019-11-26 02:19:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:52,114 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2019-11-26 02:19:52,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:19:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2019-11-26 02:19:52,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:19:52,114 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:52,115 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:52,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:52,315 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:52,316 INFO L82 PathProgramCache]: Analyzing trace with hash 976647734, now seen corresponding path program 1 times [2019-11-26 02:19:52,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:52,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1995294640] [2019-11-26 02:19:52,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:52,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:19:52,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:52,492 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:52,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:52,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1995294640] [2019-11-26 02:19:52,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195012675] [2019-11-26 02:19:52,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:52,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:19:52,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:52,672 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 [2019-11-26 02:19:52,672 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:52,675 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:52,675 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:52,675 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:19:52,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:52,745 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:52,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:19:52,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:19:52,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767785404] [2019-11-26 02:19:52,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:19:52,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:19:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:19:52,751 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 7 states. [2019-11-26 02:19:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:53,170 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2019-11-26 02:19:53,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:19:53,170 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-26 02:19:53,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:53,171 INFO L225 Difference]: With dead ends: 154 [2019-11-26 02:19:53,171 INFO L226 Difference]: Without dead ends: 154 [2019-11-26 02:19:53,172 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:19:53,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-11-26 02:19:53,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 70. [2019-11-26 02:19:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-26 02:19:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-26 02:19:53,175 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 14 [2019-11-26 02:19:53,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:53,176 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-26 02:19:53,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:19:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-26 02:19:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:19:53,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:53,176 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:53,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:53,579 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:53,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash 976647735, now seen corresponding path program 1 times [2019-11-26 02:19:53,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:53,580 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [315283809] [2019-11-26 02:19:53,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:53,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:19:53,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:53,735 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:53,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [315283809] [2019-11-26 02:19:53,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353116991] [2019-11-26 02:19:53,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:53,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:19:53,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:53,901 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 [2019-11-26 02:19:53,901 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:53,907 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:53,907 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:53,907 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:19:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:54,041 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:54,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:19:54,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:19:54,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742631684] [2019-11-26 02:19:54,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:19:54,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:54,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:19:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:19:54,522 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 14 states. [2019-11-26 02:19:55,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:55,106 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2019-11-26 02:19:55,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:19:55,111 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-11-26 02:19:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:55,112 INFO L225 Difference]: With dead ends: 165 [2019-11-26 02:19:55,112 INFO L226 Difference]: Without dead ends: 165 [2019-11-26 02:19:55,113 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:19:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-26 02:19:55,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 69. [2019-11-26 02:19:55,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-26 02:19:55,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2019-11-26 02:19:55,116 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 14 [2019-11-26 02:19:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:55,117 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2019-11-26 02:19:55,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:19:55,117 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2019-11-26 02:19:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:19:55,117 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:55,117 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:55,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:55,518 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:55,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 1 times [2019-11-26 02:19:55,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:55,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1385461220] [2019-11-26 02:19:55,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:55,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:19:55,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:55,634 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:55,637 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385461220] [2019-11-26 02:19:55,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:55,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:19:55,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397431229] [2019-11-26 02:19:55,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:19:55,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:55,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:19:55,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:19:55,638 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 5 states. [2019-11-26 02:19:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:55,681 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-11-26 02:19:55,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:19:55,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-26 02:19:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:55,682 INFO L225 Difference]: With dead ends: 69 [2019-11-26 02:19:55,682 INFO L226 Difference]: Without dead ends: 69 [2019-11-26 02:19:55,683 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:19:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-26 02:19:55,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-26 02:19:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-26 02:19:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2019-11-26 02:19:55,685 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 16 [2019-11-26 02:19:55,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:55,686 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2019-11-26 02:19:55,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:19:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2019-11-26 02:19:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:19:55,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:55,687 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:55,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:55,887 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:55,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365097, now seen corresponding path program 1 times [2019-11-26 02:19:55,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:55,888 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [771007940] [2019-11-26 02:19:55,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/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 [2019-11-26 02:19:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:56,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:19:56,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:56,047 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:56,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771007940] [2019-11-26 02:19:56,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570735435] [2019-11-26 02:19:56,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:56,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:19:56,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:56,210 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 [2019-11-26 02:19:56,211 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:56,215 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:56,215 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:56,215 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:19:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:56,307 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:56,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:19:56,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:19:56,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716536754] [2019-11-26 02:19:56,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:19:56,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:56,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:19:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:19:56,313 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 7 states. [2019-11-26 02:19:56,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:56,613 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2019-11-26 02:19:56,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:19:56,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-26 02:19:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:56,615 INFO L225 Difference]: With dead ends: 111 [2019-11-26 02:19:56,615 INFO L226 Difference]: Without dead ends: 111 [2019-11-26 02:19:56,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:19:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-26 02:19:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 67. [2019-11-26 02:19:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-26 02:19:56,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2019-11-26 02:19:56,617 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 16 [2019-11-26 02:19:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:56,618 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2019-11-26 02:19:56,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:19:56,618 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2019-11-26 02:19:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:19:56,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:56,618 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:57,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:57,019 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:57,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365096, now seen corresponding path program 1 times [2019-11-26 02:19:57,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:57,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2126729027] [2019-11-26 02:19:57,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:57,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:19:57,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:57,204 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:57,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2126729027] [2019-11-26 02:19:57,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417139015] [2019-11-26 02:19:57,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:57,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:19:57,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:57,343 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 [2019-11-26 02:19:57,343 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:57,352 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:57,352 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:57,352 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:19:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:57,449 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:57,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:19:57,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:19:57,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959986689] [2019-11-26 02:19:57,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:19:57,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:19:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:19:57,961 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 14 states. [2019-11-26 02:19:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:58,521 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2019-11-26 02:19:58,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:19:58,522 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-11-26 02:19:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:58,523 INFO L225 Difference]: With dead ends: 113 [2019-11-26 02:19:58,523 INFO L226 Difference]: Without dead ends: 113 [2019-11-26 02:19:58,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:19:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-26 02:19:58,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 65. [2019-11-26 02:19:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-26 02:19:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2019-11-26 02:19:58,527 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 16 [2019-11-26 02:19:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:58,527 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2019-11-26 02:19:58,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:19:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2019-11-26 02:19:58,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:19:58,528 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:58,528 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:58,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:58,929 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:58,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:58,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1202804242, now seen corresponding path program 1 times [2019-11-26 02:19:58,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:58,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1781896199] [2019-11-26 02:19:58,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:59,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:19:59,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:59,035 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:59,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1781896199] [2019-11-26 02:19:59,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:19:59,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:19:59,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130008024] [2019-11-26 02:19:59,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:19:59,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:19:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:19:59,039 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 6 states. [2019-11-26 02:19:59,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:59,082 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2019-11-26 02:19:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:19:59,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-26 02:19:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:59,084 INFO L225 Difference]: With dead ends: 65 [2019-11-26 02:19:59,084 INFO L226 Difference]: Without dead ends: 65 [2019-11-26 02:19:59,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:19:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-26 02:19:59,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-26 02:19:59,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-26 02:19:59,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-26 02:19:59,087 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 17 [2019-11-26 02:19:59,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:59,087 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-26 02:19:59,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:19:59,087 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-26 02:19:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:19:59,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:59,088 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:19:59,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:59,288 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:19:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:19:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash 208974459, now seen corresponding path program 1 times [2019-11-26 02:19:59,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:19:59,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1913940229] [2019-11-26 02:19:59,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:19:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:59,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:19:59,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:59,478 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:19:59,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1913940229] [2019-11-26 02:19:59,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010217954] [2019-11-26 02:19:59,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:19:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:19:59,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:19:59,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:19:59,643 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:19:59,644 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:19:59,646 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:19:59,646 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:19:59,646 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:19:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:59,708 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:19:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:19:59,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:19:59,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:19:59,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013381196] [2019-11-26 02:19:59,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:19:59,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:19:59,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:19:59,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:19:59,727 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 7 states. [2019-11-26 02:19:59,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:19:59,968 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2019-11-26 02:19:59,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:19:59,969 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-26 02:19:59,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:19:59,969 INFO L225 Difference]: With dead ends: 95 [2019-11-26 02:19:59,969 INFO L226 Difference]: Without dead ends: 95 [2019-11-26 02:19:59,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:19:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-26 02:19:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2019-11-26 02:19:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-26 02:19:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-11-26 02:19:59,972 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 21 [2019-11-26 02:19:59,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:19:59,972 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-11-26 02:19:59,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:19:59,972 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-11-26 02:19:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:19:59,973 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:19:59,973 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:20:00,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:00,378 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:20:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash 208974460, now seen corresponding path program 1 times [2019-11-26 02:20:00,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:20:00,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1999476334] [2019-11-26 02:20:00,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:00,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:20:00,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:00,598 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:00,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:00,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999476334] [2019-11-26 02:20:00,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300312869] [2019-11-26 02:20:00,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:00,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-26 02:20:00,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:00,803 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 [2019-11-26 02:20:00,804 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:20:00,808 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:20:00,808 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:20:00,808 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:20:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:00,970 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:01,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:20:01,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:20:01,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23163688] [2019-11-26 02:20:01,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:20:01,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:20:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:20:01,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:20:01,475 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 14 states. [2019-11-26 02:20:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:01,950 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2019-11-26 02:20:01,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:20:01,950 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-26 02:20:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:01,951 INFO L225 Difference]: With dead ends: 97 [2019-11-26 02:20:01,951 INFO L226 Difference]: Without dead ends: 97 [2019-11-26 02:20:01,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:20:01,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-26 02:20:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2019-11-26 02:20:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-26 02:20:01,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-26 02:20:01,954 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 21 [2019-11-26 02:20:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:01,955 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-26 02:20:01,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:20:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-26 02:20:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-26 02:20:01,955 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:01,956 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:20:02,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:02,358 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:20:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1667629311, now seen corresponding path program 1 times [2019-11-26 02:20:02,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:20:02,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1060513489] [2019-11-26 02:20:02,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:02,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:20:02,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:02,465 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:02,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060513489] [2019-11-26 02:20:02,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:20:02,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:20:02,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978066301] [2019-11-26 02:20:02,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:20:02,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:20:02,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:20:02,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:20:02,471 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 6 states. [2019-11-26 02:20:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:02,516 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2019-11-26 02:20:02,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:20:02,517 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-26 02:20:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:02,517 INFO L225 Difference]: With dead ends: 61 [2019-11-26 02:20:02,517 INFO L226 Difference]: Without dead ends: 61 [2019-11-26 02:20:02,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:20:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-26 02:20:02,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-26 02:20:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-26 02:20:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-11-26 02:20:02,520 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 25 [2019-11-26 02:20:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:02,520 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-11-26 02:20:02,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:20:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-11-26 02:20:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-26 02:20:02,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:02,521 INFO L410 BasicCegarLoop]: trace histogram [2, 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] [2019-11-26 02:20:02,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:02,721 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:20:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:02,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1821511215, now seen corresponding path program 1 times [2019-11-26 02:20:02,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:20:02,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [903803232] [2019-11-26 02:20:02,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:02,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:20:02,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:02,904 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:02,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [903803232] [2019-11-26 02:20:02,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:20:02,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2019-11-26 02:20:02,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674074556] [2019-11-26 02:20:02,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:20:02,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:20:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:20:02,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:20:02,911 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 7 states. [2019-11-26 02:20:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:03,018 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-26 02:20:03,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:20:03,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-11-26 02:20:03,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:03,019 INFO L225 Difference]: With dead ends: 61 [2019-11-26 02:20:03,020 INFO L226 Difference]: Without dead ends: 61 [2019-11-26 02:20:03,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:20:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-26 02:20:03,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-26 02:20:03,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-26 02:20:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2019-11-26 02:20:03,022 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 30 [2019-11-26 02:20:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:03,023 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2019-11-26 02:20:03,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:20:03,023 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2019-11-26 02:20:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-26 02:20:03,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:03,025 INFO L410 BasicCegarLoop]: trace histogram [2, 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] [2019-11-26 02:20:03,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:03,227 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:20:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1821512689, now seen corresponding path program 1 times [2019-11-26 02:20:03,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:20:03,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1094821371] [2019-11-26 02:20:03,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:03,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:20:03,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:03,471 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:03,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1094821371] [2019-11-26 02:20:03,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000776735] [2019-11-26 02:20:03,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:03,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:20:03,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:03,627 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 [2019-11-26 02:20:03,628 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:20:03,630 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:20:03,631 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:20:03,631 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:20:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:03,734 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:03,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:20:03,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 16 [2019-11-26 02:20:03,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959625264] [2019-11-26 02:20:03,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:20:03,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:20:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:20:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:20:03,753 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 8 states. [2019-11-26 02:20:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:04,046 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-26 02:20:04,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:20:04,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-26 02:20:04,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:04,047 INFO L225 Difference]: With dead ends: 63 [2019-11-26 02:20:04,047 INFO L226 Difference]: Without dead ends: 63 [2019-11-26 02:20:04,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:20:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-26 02:20:04,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2019-11-26 02:20:04,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-26 02:20:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-11-26 02:20:04,049 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 30 [2019-11-26 02:20:04,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:04,050 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-11-26 02:20:04,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:20:04,050 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-11-26 02:20:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-26 02:20:04,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:04,051 INFO L410 BasicCegarLoop]: trace histogram [2, 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] [2019-11-26 02:20:04,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:04,454 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:20:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:04,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1821512688, now seen corresponding path program 1 times [2019-11-26 02:20:04,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:20:04,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1484798018] [2019-11-26 02:20:04,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:04,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:20:04,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:04,691 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:04,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1484798018] [2019-11-26 02:20:04,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705795936] [2019-11-26 02:20:04,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:04,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-26 02:20:04,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:04,885 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 [2019-11-26 02:20:04,886 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:20:04,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:20:04,892 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:20:04,892 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:20:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:05,041 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:05,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:20:05,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 24 [2019-11-26 02:20:05,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811248603] [2019-11-26 02:20:05,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-26 02:20:05,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:20:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-26 02:20:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2019-11-26 02:20:05,627 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 16 states. [2019-11-26 02:20:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:06,254 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-11-26 02:20:06,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:20:06,255 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-11-26 02:20:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:06,256 INFO L225 Difference]: With dead ends: 57 [2019-11-26 02:20:06,256 INFO L226 Difference]: Without dead ends: 57 [2019-11-26 02:20:06,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2019-11-26 02:20:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-26 02:20:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-26 02:20:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-26 02:20:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-26 02:20:06,259 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 30 [2019-11-26 02:20:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:06,259 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-26 02:20:06,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-26 02:20:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-26 02:20:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-26 02:20:06,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:06,262 INFO L410 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2019-11-26 02:20:06,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:06,663 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:20:06,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1129251155, now seen corresponding path program 1 times [2019-11-26 02:20:06,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:20:06,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [903051878] [2019-11-26 02:20:06,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:06,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:06,899 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:20:06,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:06,926 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:06,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [903051878] [2019-11-26 02:20:06,991 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430399793] [2019-11-26 02:20:06,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:07,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-26 02:20:07,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:07,082 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 [2019-11-26 02:20:07,082 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:20:07,084 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:20:07,084 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:20:07,084 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:20:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:07,179 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:07,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:20:07,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 17 [2019-11-26 02:20:07,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820372260] [2019-11-26 02:20:07,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:20:07,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:20:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:20:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:20:07,228 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 9 states. [2019-11-26 02:20:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:07,623 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2019-11-26 02:20:07,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:20:07,623 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-11-26 02:20:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:07,623 INFO L225 Difference]: With dead ends: 59 [2019-11-26 02:20:07,623 INFO L226 Difference]: Without dead ends: 59 [2019-11-26 02:20:07,624 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:20:07,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-26 02:20:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2019-11-26 02:20:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-26 02:20:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-26 02:20:07,625 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 36 [2019-11-26 02:20:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:07,625 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-26 02:20:07,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:20:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-26 02:20:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-26 02:20:07,626 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:20:07,626 INFO L410 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2019-11-26 02:20:08,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 cvc4 --incremental --print-success --lang smt --rewrite-divk,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:08,027 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:20:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:20:08,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1129251156, now seen corresponding path program 1 times [2019-11-26 02:20:08,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:20:08,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [178863908] [2019-11-26 02:20:08,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/cvc4 Starting monitored process 32 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:08,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:20:08,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:08,282 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:20:08,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [178863908] [2019-11-26 02:20:08,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792745720] [2019-11-26 02:20:08,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:20:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:20:08,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:20:08,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:20:08,684 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2019-11-26 02:20:08,685 INFO L343 Elim1Store]: treesize reduction 285, result has 21.5 percent of original size [2019-11-26 02:20:08,685 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 123 [2019-11-26 02:20:08,705 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:20:08,705 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 24 [2019-11-26 02:20:08,705 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:20:08,708 INFO L567 ElimStorePlain]: treesize reduction 13, result has 7.1 percent of original size [2019-11-26 02:20:08,709 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:20:08,710 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:20:08,710 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:20:08,710 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:1 [2019-11-26 02:20:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:08,712 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:20:09,134 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2019-11-26 02:20:09,135 INFO L343 Elim1Store]: treesize reduction 285, result has 28.7 percent of original size [2019-11-26 02:20:09,135 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 135 [2019-11-26 02:20:09,148 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:20:09,148 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 25 [2019-11-26 02:20:09,149 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:20:09,152 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:20:09,152 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:20:09,159 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:20:09,160 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:20:09,160 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2019-11-26 02:20:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:20:09,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:20:09,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 8] imperfect sequences [6, 6] total 19 [2019-11-26 02:20:09,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253054503] [2019-11-26 02:20:09,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:20:09,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:20:09,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:20:09,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:20:09,236 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 11 states. [2019-11-26 02:20:09,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:20:09,467 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-26 02:20:09,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:20:09,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-11-26 02:20:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:20:09,467 INFO L225 Difference]: With dead ends: 32 [2019-11-26 02:20:09,467 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:20:09,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-11-26 02:20:09,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:20:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:20:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:20:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:20:09,468 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2019-11-26 02:20:09,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:20:09,468 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:20:09,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:20:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:20:09,469 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:20:09,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:20:09,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:20:09 BoogieIcfgContainer [2019-11-26 02:20:09,873 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:20:09,873 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:20:09,873 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:20:09,873 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:20:09,874 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:19:47" (3/4) ... [2019-11-26 02:20:09,876 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:20:09,886 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2019-11-26 02:20:09,886 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-11-26 02:20:09,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-26 02:20:09,887 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:20:09,945 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8ae378ef-bfc1-4bba-8e27-3ec61b742147/bin/utaipan/witness.graphml [2019-11-26 02:20:09,945 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:20:09,946 INFO L168 Benchmark]: Toolchain (without parser) took 23874.94 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 352.8 MB). Free memory was 944.7 MB in the beginning and 1.3 GB in the end (delta: -351.0 MB). Peak memory consumption was 1.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:20:09,947 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:20:09,947 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -164.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:20:09,948 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.49 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:20:09,948 INFO L168 Benchmark]: Boogie Preprocessor took 72.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:20:09,948 INFO L168 Benchmark]: RCFGBuilder took 684.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:20:09,949 INFO L168 Benchmark]: TraceAbstraction took 22245.26 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 197.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -239.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:20:09,949 INFO L168 Benchmark]: Witness Printer took 72.13 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:20:09,951 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 693.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 155.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -164.5 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 98.49 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 72.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 684.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 41.7 MB). Peak memory consumption was 41.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 22245.26 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 197.7 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -239.3 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 72.13 ms. Allocated memory is still 1.4 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 4.4 MB). Peak memory consumption was 4.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 682]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 682]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 658]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 658]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 660]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 660]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 769]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 25 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 73 locations, 25 error locations. Result: SAFE, OverallTime: 22.1s, OverallIterations: 22, TraceHistogramMax: 2, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1640 SDtfs, 5200 SDslu, 2312 SDs, 0 SdLazy, 1454 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1258 GetRequests, 978 SyntacticMatches, 4 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=7, 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, 22 MinimizatonAttempts, 841 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 5.9s InterpolantComputationTime, 627 NumberOfCodeBlocks, 627 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1190 ConstructedInterpolants, 1 QuantifiedInterpolants, 120962 SizeOfPredicates, 250 NumberOfNonLiveVariables, 3613 ConjunctsInSsa, 315 ConjunctsInUnsatCore, 64 InterpolantComputations, 44 PerfectInterpolantSequences, 84/144 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 correct! Received shutdown request...