./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.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_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 0775aa74e42740d69127a88680deb3bae2149559 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:08:52,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:08:52,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:08:52,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:08:52,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:08:52,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:08:52,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:08:52,162 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:08:52,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:08:52,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:08:52,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:08:52,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:08:52,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:08:52,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:08:52,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:08:52,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:08:52,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:08:52,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:08:52,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:08:52,186 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:08:52,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:08:52,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:08:52,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:08:52,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:08:52,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:08:52,198 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:08:52,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:08:52,200 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:08:52,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:08:52,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:08:52,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:08:52,201 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:08:52,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:08:52,203 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:08:52,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:08:52,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:08:52,204 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:08:52,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:08:52,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:08:52,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:08:52,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:08:52,208 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:08:52,231 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:08:52,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:08:52,242 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:08:52,242 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:08:52,242 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:08:52,242 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:08:52,242 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:08:52,242 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:08:52,243 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:08:52,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:08:52,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:08:52,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:08:52,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:08:52,243 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:08:52,244 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:08:52,245 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:52,245 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:08:52,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:08:52,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:08:52,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:08:52,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:08:52,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:08:52,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:08:52,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:08:52,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:08:52,247 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:08:52,247 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:08:52,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:08:52,247 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_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 -> 0775aa74e42740d69127a88680deb3bae2149559 [2019-11-26 02:08:52,376 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:08:52,385 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:08:52,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:08:52,389 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:08:52,389 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:08:52,390 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2019-11-26 02:08:52,438 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/data/bab56c2c5/3441367ff2be4de1a9ca1fc61fc24a16/FLAG9ded8f5d7 [2019-11-26 02:08:52,965 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:08:52,965 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/sv-benchmarks/c/ldv-memsafety/memleaks_test4-2.i [2019-11-26 02:08:52,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/data/bab56c2c5/3441367ff2be4de1a9ca1fc61fc24a16/FLAG9ded8f5d7 [2019-11-26 02:08:53,457 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/data/bab56c2c5/3441367ff2be4de1a9ca1fc61fc24a16 [2019-11-26 02:08:53,459 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:08:53,460 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:08:53,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:08:53,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:08:53,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:08:53,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:08:53" (1/1) ... [2019-11-26 02:08:53,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a5a177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:53, skipping insertion in model container [2019-11-26 02:08:53,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:08:53" (1/1) ... [2019-11-26 02:08:53,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:08:53,510 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:08:53,896 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 02:08:53,897 INFO L968 CHandler]: at location: C: (struct ldv_msg*)ldv_malloc(sizeof(struct ldv_msg)) [576] [2019-11-26 02:08:53,897 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:53,916 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 02:08:53,917 INFO L968 CHandler]: at location: C: (typeof(*msg) *)( (char *)__mptr - ((size_t) &((typeof(*msg) *)0)->list) ) [607] [2019-11-26 02:08:53,917 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:53,921 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 02:08:53,921 INFO L968 CHandler]: at location: C: (typeof(*(msg)) *)( (char *)__mptr - ((size_t) &((typeof(*(msg)) *)0)->list) ) [607] [2019-11-26 02:08:53,922 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:53,925 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 02:08:53,925 INFO L968 CHandler]: at location: C: (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) ) [607] [2019-11-26 02:08:53,925 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:53,961 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 02:08:53,962 INFO L968 CHandler]: at location: C: (struct ldv_kobject *)( (char *)__mptr - ((size_t) &((struct ldv_kobject *)0)->kref) ) [706] [2019-11-26 02:08:53,962 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:53,970 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 02:08:53,970 INFO L968 CHandler]: at location: C: (int *)ldv_malloc(sizeof(int)) [758] [2019-11-26 02:08:53,971 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:53,971 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 02:08:53,972 INFO L968 CHandler]: at location: C: (int *)ldv_malloc(sizeof(int)) [760] [2019-11-26 02:08:53,972 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:53,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:08:54,001 INFO L198 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2019-11-26 02:08:54,019 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:08:54,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:08:54,105 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:08:54,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:08:54,223 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:08:54,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54 WrapperNode [2019-11-26 02:08:54,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:08:54,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:08:54,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:08:54,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:08:54,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,254 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,272 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:08:54,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:08:54,273 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:08:54,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:08:54,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... [2019-11-26 02:08:54,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:08:54,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:08:54,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:08:54,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:08:54,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:08:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:08:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:08:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-26 02:08:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:08:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:08:54,596 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:08:54,596 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-26 02:08:54,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:08:54 BoogieIcfgContainer [2019-11-26 02:08:54,598 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:08:54,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:08:54,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:08:54,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:08:54,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:08:53" (1/3) ... [2019-11-26 02:08:54,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b69cccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:08:54, skipping insertion in model container [2019-11-26 02:08:54,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:54" (2/3) ... [2019-11-26 02:08:54,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b69cccd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:08:54, skipping insertion in model container [2019-11-26 02:08:54,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:08:54" (3/3) ... [2019-11-26 02:08:54,603 INFO L109 eAbstractionObserver]: Analyzing ICFG memleaks_test4-2.i [2019-11-26 02:08:54,611 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:08:54,617 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-26 02:08:54,626 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-26 02:08:54,642 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:08:54,642 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:08:54,642 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:08:54,642 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:08:54,643 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:08:54,643 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:08:54,643 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:08:54,643 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:08:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-26 02:08:54,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:08:54,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:54,660 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:08:54,661 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 889509386, now seen corresponding path program 1 times [2019-11-26 02:08:54,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:54,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [31090592] [2019-11-26 02:08:54,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:54,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:08:54,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:54,838 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 02:08:54,839 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:54,842 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 02:08:54,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [31090592] [2019-11-26 02:08:54,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:54,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:08:54,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34231558] [2019-11-26 02:08:54,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:08:54,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:08:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:08:54,860 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2019-11-26 02:08:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:54,980 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2019-11-26 02:08:54,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:08:54,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:08:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:54,992 INFO L225 Difference]: With dead ends: 75 [2019-11-26 02:08:54,995 INFO L226 Difference]: Without dead ends: 67 [2019-11-26 02:08:54,998 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 02:08:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-26 02:08:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 23. [2019-11-26 02:08:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:08:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-11-26 02:08:55,041 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 6 [2019-11-26 02:08:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:55,042 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-11-26 02:08:55,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:08:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-11-26 02:08:55,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:08:55,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:55,043 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:08:55,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:55,246 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:55,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:55,246 INFO L82 PathProgramCache]: Analyzing trace with hash 889568968, now seen corresponding path program 1 times [2019-11-26 02:08:55,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:55,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1080410073] [2019-11-26 02:08:55,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:55,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-26 02:08:55,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:55,320 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 02:08:55,320 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:55,321 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 02:08:55,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1080410073] [2019-11-26 02:08:55,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:55,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:08:55,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159567875] [2019-11-26 02:08:55,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:08:55,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:08:55,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:08:55,324 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 3 states. [2019-11-26 02:08:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:55,361 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-26 02:08:55,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:08:55,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-26 02:08:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:55,363 INFO L225 Difference]: With dead ends: 32 [2019-11-26 02:08:55,363 INFO L226 Difference]: Without dead ends: 31 [2019-11-26 02:08:55,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 02:08:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-26 02:08:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2019-11-26 02:08:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-26 02:08:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-26 02:08:55,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 6 [2019-11-26 02:08:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:55,368 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-26 02:08:55,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:08:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-26 02:08:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:08:55,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:55,369 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:55,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:55,569 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:55,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:55,570 INFO L82 PathProgramCache]: Analyzing trace with hash 119384781, now seen corresponding path program 1 times [2019-11-26 02:08:55,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:55,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [903622160] [2019-11-26 02:08:55,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:55,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:08:55,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:55,654 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 02:08:55,654 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:55,656 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 02:08:55,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [903622160] [2019-11-26 02:08:55,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:55,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-26 02:08:55,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411383934] [2019-11-26 02:08:55,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:08:55,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:08:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:08:55,657 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2019-11-26 02:08:55,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:55,700 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-11-26 02:08:55,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:08:55,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:08:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:55,702 INFO L225 Difference]: With dead ends: 20 [2019-11-26 02:08:55,702 INFO L226 Difference]: Without dead ends: 20 [2019-11-26 02:08:55,702 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 02:08:55,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-26 02:08:55,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-26 02:08:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-26 02:08:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-26 02:08:55,705 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 8 [2019-11-26 02:08:55,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:55,705 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-26 02:08:55,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:08:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-26 02:08:55,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:08:55,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:55,706 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:55,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:55,906 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:55,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:55,907 INFO L82 PathProgramCache]: Analyzing trace with hash -594039032, now seen corresponding path program 1 times [2019-11-26 02:08:55,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:55,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [911103871] [2019-11-26 02:08:55,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:55,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:08:55,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:56,012 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 02:08:56,012 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:56,030 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 02:08:56,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [911103871] [2019-11-26 02:08:56,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:56,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 02:08:56,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371203563] [2019-11-26 02:08:56,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:08:56,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:56,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:08:56,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:08:56,032 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2019-11-26 02:08:56,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:56,164 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-26 02:08:56,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:08:56,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-11-26 02:08:56,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:56,165 INFO L225 Difference]: With dead ends: 33 [2019-11-26 02:08:56,166 INFO L226 Difference]: Without dead ends: 33 [2019-11-26 02:08:56,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:08:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-26 02:08:56,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2019-11-26 02:08:56,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-26 02:08:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-26 02:08:56,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 9 [2019-11-26 02:08:56,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:56,170 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-26 02:08:56,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:08:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-26 02:08:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:08:56,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:56,171 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:56,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:56,372 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:56,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:56,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1237187795, now seen corresponding path program 1 times [2019-11-26 02:08:56,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:56,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [435840306] [2019-11-26 02:08:56,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:56,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:08:56,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:56,532 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 02:08:56,533 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:56,538 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:56,539 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:56,539 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:08:56,553 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 02:08:56,553 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:56,557 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 02:08:56,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [435840306] [2019-11-26 02:08:56,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:56,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-26 02:08:56,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063638060] [2019-11-26 02:08:56,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:08:56,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:08:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:08:56,559 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2019-11-26 02:08:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:56,624 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-26 02:08:56,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:08:56,625 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-26 02:08:56,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:56,626 INFO L225 Difference]: With dead ends: 24 [2019-11-26 02:08:56,626 INFO L226 Difference]: Without dead ends: 24 [2019-11-26 02:08:56,626 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 02:08:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-26 02:08:56,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2019-11-26 02:08:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-26 02:08:56,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-26 02:08:56,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 10 [2019-11-26 02:08:56,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:56,629 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-26 02:08:56,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:08:56,630 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-26 02:08:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:08:56,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:56,630 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:56,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:56,832 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash 359142378, now seen corresponding path program 1 times [2019-11-26 02:08:56,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:56,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [659133688] [2019-11-26 02:08:56,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:56,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:08:56,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:56,912 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 02:08:56,913 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:56,916 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 02:08:56,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [659133688] [2019-11-26 02:08:56,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:56,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-26 02:08:56,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190674110] [2019-11-26 02:08:56,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:08:56,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:08:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:08:56,917 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-11-26 02:08:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:56,942 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-11-26 02:08:56,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:08:56,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-26 02:08:56,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:56,943 INFO L225 Difference]: With dead ends: 17 [2019-11-26 02:08:56,943 INFO L226 Difference]: Without dead ends: 17 [2019-11-26 02:08:56,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 02:08:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-26 02:08:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-26 02:08:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-26 02:08:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-26 02:08:56,946 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2019-11-26 02:08:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:56,946 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-26 02:08:56,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:08:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-26 02:08:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:08:56,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:56,947 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:57,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:57,155 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:57,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1751488111, now seen corresponding path program 1 times [2019-11-26 02:08:57,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:57,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2002982683] [2019-11-26 02:08:57,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:57,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:08:57,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:57,293 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 02:08:57,293 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:57,317 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 02:08:57,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002982683] [2019-11-26 02:08:57,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:57,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2019-11-26 02:08:57,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273324780] [2019-11-26 02:08:57,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:08:57,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:57,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:08:57,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:08:57,319 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 7 states. [2019-11-26 02:08:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:57,388 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2019-11-26 02:08:57,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:08:57,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-11-26 02:08:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:57,389 INFO L225 Difference]: With dead ends: 16 [2019-11-26 02:08:57,389 INFO L226 Difference]: Without dead ends: 16 [2019-11-26 02:08:57,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:08:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-26 02:08:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-26 02:08:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-26 02:08:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-26 02:08:57,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-11-26 02:08:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:57,392 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-26 02:08:57,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:08:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-26 02:08:57,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:08:57,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:57,393 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:57,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:57,597 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:57,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1538443468, now seen corresponding path program 1 times [2019-11-26 02:08:57,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:57,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1916779562] [2019-11-26 02:08:57,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:57,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:08:57,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:57,697 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-26 02:08:57,698 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:57,703 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:57,703 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:57,703 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2019-11-26 02:08:57,774 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2019-11-26 02:08:57,775 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:57,794 INFO L567 ElimStorePlain]: treesize reduction 4, result has 76.5 percent of original size [2019-11-26 02:08:57,795 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:57,795 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:13 [2019-11-26 02:08:57,809 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 02:08:57,809 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:57,867 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 02:08:57,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1916779562] [2019-11-26 02:08:57,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:57,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2019-11-26 02:08:57,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810196455] [2019-11-26 02:08:57,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:08:57,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:57,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:08:57,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:08:57,869 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 10 states. [2019-11-26 02:08:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:58,146 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-11-26 02:08:58,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-26 02:08:58,147 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-26 02:08:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:58,147 INFO L225 Difference]: With dead ends: 37 [2019-11-26 02:08:58,147 INFO L226 Difference]: Without dead ends: 37 [2019-11-26 02:08:58,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:08:58,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-26 02:08:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-11-26 02:08:58,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-26 02:08:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-26 02:08:58,151 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 13 [2019-11-26 02:08:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:58,151 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-26 02:08:58,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:08:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-26 02:08:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:08:58,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:58,152 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:58,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:58,354 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:58,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2055459250, now seen corresponding path program 1 times [2019-11-26 02:08:58,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:58,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [107260445] [2019-11-26 02:08:58,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/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 02:08:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:58,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:08:58,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:58,443 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 02:08:58,443 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:58,446 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 02:08:58,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [107260445] [2019-11-26 02:08:58,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:58,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:08:58,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44454668] [2019-11-26 02:08:58,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:08:58,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:58,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:08:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:08:58,447 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2019-11-26 02:08:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:58,527 INFO L93 Difference]: Finished difference Result 37 states and 36 transitions. [2019-11-26 02:08:58,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:08:58,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-26 02:08:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:58,529 INFO L225 Difference]: With dead ends: 37 [2019-11-26 02:08:58,529 INFO L226 Difference]: Without dead ends: 24 [2019-11-26 02:08:58,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:08:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-26 02:08:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2019-11-26 02:08:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-26 02:08:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-26 02:08:58,532 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-11-26 02:08:58,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:58,532 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-26 02:08:58,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:08:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-26 02:08:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:08:58,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:58,533 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:58,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:58,735 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-26 02:08:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash 447107319, now seen corresponding path program 1 times [2019-11-26 02:08:58,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:58,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1321651737] [2019-11-26 02:08:58,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:58,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-26 02:08:58,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:58,866 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-26 02:08:58,872 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2019-11-26 02:08:58,872 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:58,886 INFO L567 ElimStorePlain]: treesize reduction 4, result has 73.3 percent of original size [2019-11-26 02:08:58,886 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:08:58,887 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:11 [2019-11-26 02:08:59,123 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 02:08:59,123 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:12,144 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 02:09:12,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1321651737] [2019-11-26 02:09:12,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:09:12,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 15 [2019-11-26 02:09:12,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022167136] [2019-11-26 02:09:12,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-26 02:09:12,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:12,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-26 02:09:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=218, Unknown=3, NotChecked=0, Total=272 [2019-11-26 02:09:12,148 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2019-11-26 02:09:19,887 WARN L192 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 30 [2019-11-26 02:09:20,117 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 15 [2019-11-26 02:09:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:20,118 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2019-11-26 02:09:20,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-26 02:09:20,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-11-26 02:09:20,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:20,118 INFO L225 Difference]: With dead ends: 22 [2019-11-26 02:09:20,118 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:09:20,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=154, Invalid=544, Unknown=4, NotChecked=0, Total=702 [2019-11-26 02:09:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:09:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:09:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:09:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:09:20,119 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-11-26 02:09:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:20,120 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:09:20,120 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-26 02:09:20,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:09:20,120 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:09:20,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:20,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:09:20 BoogieIcfgContainer [2019-11-26 02:09:20,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:09:20,328 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:09:20,328 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:09:20,328 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:09:20,329 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:08:54" (3/4) ... [2019-11-26 02:09:20,333 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:09:20,347 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2019-11-26 02:09:20,347 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-26 02:09:20,348 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:09:20,385 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6e6bfdc7-fd80-4d43-b2bd-1860604b6a33/bin/utaipan/witness.graphml [2019-11-26 02:09:20,385 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:09:20,386 INFO L168 Benchmark]: Toolchain (without parser) took 26926.27 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -116.7 MB). Peak memory consumption was 66.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:20,387 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:09:20,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 762.60 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -111.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:20,387 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:09:20,388 INFO L168 Benchmark]: Boogie Preprocessor took 26.03 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:09:20,388 INFO L168 Benchmark]: RCFGBuilder took 298.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:20,389 INFO L168 Benchmark]: TraceAbstraction took 25727.25 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 79.7 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -44.6 MB). Peak memory consumption was 35.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:20,389 INFO L168 Benchmark]: Witness Printer took 57.43 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: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:20,391 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 762.60 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 103.8 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -111.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 48.64 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 26.03 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 298.72 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 29.0 MB). Peak memory consumption was 29.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 25727.25 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 79.7 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -44.6 MB). Peak memory consumption was 35.1 MB. Max. memory is 11.5 GB. * Witness Printer took 57.43 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: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 762]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 761]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 765]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 761]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 761]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 762]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 762]: free always succeeds For all program executions holds that free always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 7 error locations. Result: SAFE, OverallTime: 25.6s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 8.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 168 SDtfs, 322 SDslu, 177 SDs, 0 SdLazy, 344 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 211 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 21.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 90 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 184 ConstructedInterpolants, 15 QuantifiedInterpolants, 12141 SizeOfPredicates, 25 NumberOfNonLiveVariables, 407 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 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...