./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.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_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 d88c88b73ce2cba22159e6d055a27f0c7e4ebba5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:08:47,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:08:47,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:08:47,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:08:47,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:08:47,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:08:47,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:08:47,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:08:47,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:08:47,403 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:08:47,404 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:08:47,405 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:08:47,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:08:47,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:08:47,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:08:47,408 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:08:47,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:08:47,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:08:47,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:08:47,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:08:47,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:08:47,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:08:47,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:08:47,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:08:47,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:08:47,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:08:47,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:08:47,427 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:08:47,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:08:47,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:08:47,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:08:47,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:08:47,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:08:47,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:08:47,431 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:08:47,431 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:08:47,432 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:08:47,432 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:08:47,432 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:08:47,433 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:08:47,434 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:08:47,434 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2019-11-26 02:08:47,455 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:08:47,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:08:47,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:08:47,456 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:08:47,456 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:08:47,456 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:08:47,460 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:08:47,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:08:47,461 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:08:47,461 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:08:47,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:08:47,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:08:47,462 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:08:47,462 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:08:47,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:08:47,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:08:47,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:08:47,463 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:08:47,463 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:08:47,463 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-26 02:08:47,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:08:47,463 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:08:47,464 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:08:47,464 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:47,464 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:08:47,464 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:08:47,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:08:47,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:08:47,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:08:47,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:08:47,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:08:47,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:08:47,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:08:47,466 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:08:47,466 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:08:47,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:08:47,466 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_1a53587f-c075-4767-adc7-4b06fe715e30/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 -> d88c88b73ce2cba22159e6d055a27f0c7e4ebba5 [2019-11-26 02:08:47,629 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:08:47,643 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:08:47,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:08:47,646 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:08:47,647 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:08:47,647 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.i [2019-11-26 02:08:47,704 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/data/2b1d7e38e/4447c1f3a24a43189a7a947757a226c3/FLAG04cd802cb [2019-11-26 02:08:48,149 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:08:48,149 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-1.i [2019-11-26 02:08:48,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/data/2b1d7e38e/4447c1f3a24a43189a7a947757a226c3/FLAG04cd802cb [2019-11-26 02:08:48,486 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/data/2b1d7e38e/4447c1f3a24a43189a7a947757a226c3 [2019-11-26 02:08:48,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:08:48,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:08:48,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:08:48,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:08:48,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:08:48,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:08:48" (1/1) ... [2019-11-26 02:08:48,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e433afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:48, skipping insertion in model container [2019-11-26 02:08:48,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:08:48" (1/1) ... [2019-11-26 02:08:48,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:08:48,551 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:08:48,985 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 02:08:48,986 INFO L968 CHandler]: at location: C: (struct ldv_msg*)ldv_malloc(sizeof(struct ldv_msg)) [576] [2019-11-26 02:08:48,986 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:48,995 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 02:08:48,995 INFO L968 CHandler]: at location: C: (typeof(*msg) *)( (char *)__mptr - ((size_t) &((typeof(*msg) *)0)->list) ) [607] [2019-11-26 02:08:48,996 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:48,997 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 02:08:48,998 INFO L968 CHandler]: at location: C: (typeof(*(msg)) *)( (char *)__mptr - ((size_t) &((typeof(*(msg)) *)0)->list) ) [607] [2019-11-26 02:08:48,998 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:49,000 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 02:08:49,000 INFO L968 CHandler]: at location: C: (typeof(*(n)) *)( (char *)__mptr - ((size_t) &((typeof(*(n)) *)0)->list) ) [607] [2019-11-26 02:08:49,000 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:49,019 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 02:08:49,019 INFO L968 CHandler]: at location: C: (struct ldv_kobject *)( (char *)__mptr - ((size_t) &((struct ldv_kobject *)0)->kref) ) [706] [2019-11-26 02:08:49,019 INFO L969 CHandler]: current memory model: HoenickeLindenmann_4ByteResolution [2019-11-26 02:08:49,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:08:49,045 INFO L198 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2019-11-26 02:08:49,066 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:08:49,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:08:49,118 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:08:49,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:08:49,290 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:08:49,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49 WrapperNode [2019-11-26 02:08:49,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:08:49,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:08:49,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:08:49,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:08:49,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,339 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:08:49,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:08:49,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:08:49,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:08:49,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... [2019-11-26 02:08:49,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:08:49,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:08:49,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:08:49,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:08:49,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:08:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:08:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:08:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:08:49,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:08:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:08:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:08:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-26 02:08:49,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:08:49,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:08:50,227 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:08:50,227 INFO L284 CfgBuilder]: Removed 40 assume(true) statements. [2019-11-26 02:08:50,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:08:50 BoogieIcfgContainer [2019-11-26 02:08:50,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:08:50,229 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:08:50,229 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:08:50,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:08:50,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:08:48" (1/3) ... [2019-11-26 02:08:50,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1346747f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:08:50, skipping insertion in model container [2019-11-26 02:08:50,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:08:49" (2/3) ... [2019-11-26 02:08:50,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1346747f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:08:50, skipping insertion in model container [2019-11-26 02:08:50,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:08:50" (3/3) ... [2019-11-26 02:08:50,236 INFO L109 eAbstractionObserver]: Analyzing ICFG memleaks_test22_1-1.i [2019-11-26 02:08:50,244 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:08:50,252 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2019-11-26 02:08:50,262 INFO L249 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2019-11-26 02:08:50,282 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:08:50,282 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:08:50,283 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:08:50,283 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:08:50,283 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:08:50,283 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:08:50,283 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:08:50,283 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:08:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states. [2019-11-26 02:08:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:08:50,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:50,315 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:08:50,316 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:50,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:50,322 INFO L82 PathProgramCache]: Analyzing trace with hash 889508776, now seen corresponding path program 1 times [2019-11-26 02:08:50,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:50,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1341876073] [2019-11-26 02:08:50,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:50,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:08:50,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:50,515 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 02:08:50,515 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:50,521 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:50,522 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:50,522 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:08:50,552 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 02:08:50,553 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:50,557 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 02:08:50,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1341876073] [2019-11-26 02:08:50,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:50,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:08:50,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686548456] [2019-11-26 02:08:50,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:08:50,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:08:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:08:50,583 INFO L87 Difference]: Start difference. First operand 72 states. Second operand 5 states. [2019-11-26 02:08:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:51,103 INFO L93 Difference]: Finished difference Result 212 states and 230 transitions. [2019-11-26 02:08:51,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:08:51,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-26 02:08:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:51,115 INFO L225 Difference]: With dead ends: 212 [2019-11-26 02:08:51,116 INFO L226 Difference]: Without dead ends: 204 [2019-11-26 02:08:51,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:08:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-26 02:08:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 73. [2019-11-26 02:08:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-26 02:08:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-11-26 02:08:51,154 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 6 [2019-11-26 02:08:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:51,154 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-11-26 02:08:51,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:08:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-11-26 02:08:51,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:08:51,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:51,155 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:08:51,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:51,358 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash 889568358, now seen corresponding path program 1 times [2019-11-26 02:08:51,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:51,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1302933161] [2019-11-26 02:08:51,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:51,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:08:51,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:51,488 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 02:08:51,489 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:51,490 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 02:08:51,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1302933161] [2019-11-26 02:08:51,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:51,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:08:51,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843720130] [2019-11-26 02:08:51,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:08:51,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:08:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:08:51,493 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 4 states. [2019-11-26 02:08:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:51,539 INFO L93 Difference]: Finished difference Result 163 states and 177 transitions. [2019-11-26 02:08:51,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:08:51,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:08:51,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:51,545 INFO L225 Difference]: With dead ends: 163 [2019-11-26 02:08:51,545 INFO L226 Difference]: Without dead ends: 163 [2019-11-26 02:08:51,546 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 02:08:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-26 02:08:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 71. [2019-11-26 02:08:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-26 02:08:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2019-11-26 02:08:51,561 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 6 [2019-11-26 02:08:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:51,561 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2019-11-26 02:08:51,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:08:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2019-11-26 02:08:51,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:08:51,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:51,562 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:51,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:51,763 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:51,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968328, now seen corresponding path program 1 times [2019-11-26 02:08:51,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:51,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1757680308] [2019-11-26 02:08:51,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:51,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:08:51,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:51,894 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 02:08:51,894 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:51,900 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:51,900 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:51,901 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:08:51,947 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 02:08:51,947 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:52,157 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 02:08:52,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757680308] [2019-11-26 02:08:52,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:52,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-26 02:08:52,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530263254] [2019-11-26 02:08:52,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:08:52,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:08:52,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-26 02:08:52,159 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 10 states. [2019-11-26 02:08:52,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:52,709 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2019-11-26 02:08:52,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:08:52,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 7 [2019-11-26 02:08:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:52,711 INFO L225 Difference]: With dead ends: 162 [2019-11-26 02:08:52,712 INFO L226 Difference]: Without dead ends: 162 [2019-11-26 02:08:52,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-26 02:08:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-26 02:08:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 70. [2019-11-26 02:08:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-26 02:08:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2019-11-26 02:08:52,719 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 7 [2019-11-26 02:08:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:52,720 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2019-11-26 02:08:52,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:08:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2019-11-26 02:08:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:08:52,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:52,721 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:52,925 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:52,926 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash 119421555, now seen corresponding path program 1 times [2019-11-26 02:08:52,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:52,927 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1689211937] [2019-11-26 02:08:52,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:53,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:08:53,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:53,049 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:53,050 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 02:08:53,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689211937] [2019-11-26 02:08:53,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:53,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:08:53,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77540926] [2019-11-26 02:08:53,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:08:53,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:53,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:08:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:08:53,052 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand 4 states. [2019-11-26 02:08:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:53,073 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2019-11-26 02:08:53,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:08:53,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:08:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:53,074 INFO L225 Difference]: With dead ends: 116 [2019-11-26 02:08:53,074 INFO L226 Difference]: Without dead ends: 116 [2019-11-26 02:08:53,075 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 02:08:53,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-26 02:08:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 70. [2019-11-26 02:08:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-26 02:08:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2019-11-26 02:08:53,080 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 8 [2019-11-26 02:08:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:53,081 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2019-11-26 02:08:53,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:08:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2019-11-26 02:08:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:08:53,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:53,082 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:53,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:53,284 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 176679857, now seen corresponding path program 1 times [2019-11-26 02:08:53,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:53,285 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1826929066] [2019-11-26 02:08:53,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:53,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:08:53,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:53,442 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 02:08:53,443 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:53,445 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 02:08:53,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826929066] [2019-11-26 02:08:53,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:53,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-26 02:08:53,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327185704] [2019-11-26 02:08:53,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:08:53,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:53,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:08:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:08:53,447 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 4 states. [2019-11-26 02:08:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:53,475 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2019-11-26 02:08:53,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:08:53,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:08:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:53,477 INFO L225 Difference]: With dead ends: 142 [2019-11-26 02:08:53,477 INFO L226 Difference]: Without dead ends: 142 [2019-11-26 02:08:53,477 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 02:08:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-26 02:08:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 72. [2019-11-26 02:08:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-26 02:08:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2019-11-26 02:08:53,482 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 8 [2019-11-26 02:08:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:53,483 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2019-11-26 02:08:53,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:08:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2019-11-26 02:08:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:08:53,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:53,484 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:53,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:53,686 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2147150397, now seen corresponding path program 1 times [2019-11-26 02:08:53,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:53,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1689197327] [2019-11-26 02:08:53,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:53,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-26 02:08:53,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:53,772 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 02:08:53,773 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:53,774 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 02:08:53,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1689197327] [2019-11-26 02:08:53,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:53,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:08:53,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950847800] [2019-11-26 02:08:53,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:08:53,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:53,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:08:53,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:08:53,776 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 3 states. [2019-11-26 02:08:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:53,868 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-26 02:08:53,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:08:53,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-26 02:08:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:53,869 INFO L225 Difference]: With dead ends: 98 [2019-11-26 02:08:53,870 INFO L226 Difference]: Without dead ends: 95 [2019-11-26 02:08:53,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 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 02:08:53,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-26 02:08:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2019-11-26 02:08:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-26 02:08:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-11-26 02:08:53,874 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 11 [2019-11-26 02:08:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:53,874 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-11-26 02:08:53,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:08:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-11-26 02:08:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:08:53,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:53,875 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:54,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:54,077 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:54,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2147148924, now seen corresponding path program 1 times [2019-11-26 02:08:54,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:54,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1163879828] [2019-11-26 02:08:54,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:54,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-26 02:08:54,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:54,204 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 02:08:54,204 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:54,208 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 02:08:54,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163879828] [2019-11-26 02:08:54,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:54,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:08:54,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742398599] [2019-11-26 02:08:54,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:08:54,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:54,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:08:54,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:08:54,209 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 5 states. [2019-11-26 02:08:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:54,269 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2019-11-26 02:08:54,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:08:54,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-26 02:08:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:54,270 INFO L225 Difference]: With dead ends: 77 [2019-11-26 02:08:54,270 INFO L226 Difference]: Without dead ends: 70 [2019-11-26 02:08:54,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:08:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-26 02:08:54,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-11-26 02:08:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-26 02:08:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-11-26 02:08:54,274 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 11 [2019-11-26 02:08:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:54,275 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-11-26 02:08:54,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:08:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-11-26 02:08:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:08:54,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:54,276 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:54,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:54,479 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 820865718, now seen corresponding path program 1 times [2019-11-26 02:08:54,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:54,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1633616307] [2019-11-26 02:08:54,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:54,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-26 02:08:54,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:54,599 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 02:08:54,599 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:54,616 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 02:08:54,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1633616307] [2019-11-26 02:08:54,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:54,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-26 02:08:54,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779242301] [2019-11-26 02:08:54,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:08:54,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:54,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:08:54,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:08:54,617 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 6 states. [2019-11-26 02:08:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:54,641 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2019-11-26 02:08:54,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:08:54,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-11-26 02:08:54,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:54,646 INFO L225 Difference]: With dead ends: 70 [2019-11-26 02:08:54,647 INFO L226 Difference]: Without dead ends: 70 [2019-11-26 02:08:54,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:08:54,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-26 02:08:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-26 02:08:54,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-26 02:08:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-26 02:08:54,651 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 12 [2019-11-26 02:08:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:54,651 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-26 02:08:54,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:08:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-26 02:08:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:08:54,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:54,652 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:54,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:54,853 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:54,853 INFO L82 PathProgramCache]: Analyzing trace with hash 976647734, now seen corresponding path program 1 times [2019-11-26 02:08:54,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:54,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1372262679] [2019-11-26 02:08:54,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/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 02:08:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:54,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:08:54,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:55,019 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:55,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372262679] [2019-11-26 02:08:55,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45690669] [2019-11-26 02:08:55,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:08:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:55,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:08:55,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:55,185 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 02:08:55,185 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:55,188 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:55,188 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:55,188 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:08:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:55,278 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:55,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:08:55,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:08:55,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087818691] [2019-11-26 02:08:55,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:08:55,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:55,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:08:55,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:08:55,285 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 7 states. [2019-11-26 02:08:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:55,709 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2019-11-26 02:08:55,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:08:55,710 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-11-26 02:08:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:55,711 INFO L225 Difference]: With dead ends: 151 [2019-11-26 02:08:55,711 INFO L226 Difference]: Without dead ends: 151 [2019-11-26 02:08:55,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:08:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-26 02:08:55,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 69. [2019-11-26 02:08:55,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-26 02:08:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2019-11-26 02:08:55,715 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 14 [2019-11-26 02:08:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:55,716 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2019-11-26 02:08:55,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:08:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2019-11-26 02:08:55,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-26 02:08:55,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:55,716 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:56,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:08:56,119 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash 976647735, now seen corresponding path program 1 times [2019-11-26 02:08:56,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:56,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [937749120] [2019-11-26 02:08:56,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:56,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:08:56,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:56,259 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:56,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [937749120] [2019-11-26 02:08:56,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395332023] [2019-11-26 02:08:56,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:08:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:56,396 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:08:56,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:56,414 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 02:08:56,414 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:56,418 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:56,419 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:56,419 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:08:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:56,555 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:57,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:57,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:08:57,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:08:57,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960579333] [2019-11-26 02:08:57,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:08:57,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:57,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:08:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:08:57,006 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 14 states. [2019-11-26 02:08:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:57,648 INFO L93 Difference]: Finished difference Result 162 states and 174 transitions. [2019-11-26 02:08:57,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:08:57,651 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2019-11-26 02:08:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:57,653 INFO L225 Difference]: With dead ends: 162 [2019-11-26 02:08:57,653 INFO L226 Difference]: Without dead ends: 162 [2019-11-26 02:08:57,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:08:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-26 02:08:57,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 68. [2019-11-26 02:08:57,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-26 02:08:57,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-11-26 02:08:57,657 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 14 [2019-11-26 02:08:57,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:57,657 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-11-26 02:08:57,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:08:57,657 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-11-26 02:08:57,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:08:57,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:57,658 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:58,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:08:58,059 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:58,060 INFO L82 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 1 times [2019-11-26 02:08:58,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:58,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1773048823] [2019-11-26 02:08:58,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:58,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:08:58,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:58,157 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:58,160 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1773048823] [2019-11-26 02:08:58,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:08:58,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-26 02:08:58,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648302529] [2019-11-26 02:08:58,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:08:58,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:58,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:08:58,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:08:58,161 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 5 states. [2019-11-26 02:08:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:58,197 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2019-11-26 02:08:58,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:08:58,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-26 02:08:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:58,198 INFO L225 Difference]: With dead ends: 68 [2019-11-26 02:08:58,199 INFO L226 Difference]: Without dead ends: 68 [2019-11-26 02:08:58,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:08:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-26 02:08:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-26 02:08:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-26 02:08:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2019-11-26 02:08:58,201 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 16 [2019-11-26 02:08:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:58,202 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2019-11-26 02:08:58,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:08:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2019-11-26 02:08:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:08:58,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:58,203 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:58,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:58,403 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:58,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365097, now seen corresponding path program 1 times [2019-11-26 02:08:58,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:58,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [996498771] [2019-11-26 02:08:58,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:58,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:08:58,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:58,552 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:58,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996498771] [2019-11-26 02:08:58,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068590073] [2019-11-26 02:08:58,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:08:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:58,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-26 02:08:58,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:58,686 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 02:08:58,686 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:58,688 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:58,688 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:58,688 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:08:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:58,779 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:58,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:08:58,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:08:58,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042734828] [2019-11-26 02:08:58,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:08:58,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:08:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:08:58,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:08:58,788 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 7 states. [2019-11-26 02:08:59,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:08:59,063 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2019-11-26 02:08:59,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:08:59,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-26 02:08:59,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:08:59,065 INFO L225 Difference]: With dead ends: 109 [2019-11-26 02:08:59,065 INFO L226 Difference]: Without dead ends: 109 [2019-11-26 02:08:59,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:08:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-26 02:08:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2019-11-26 02:08:59,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-26 02:08:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2019-11-26 02:08:59,068 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 16 [2019-11-26 02:08:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:08:59,068 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2019-11-26 02:08:59,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:08:59,068 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2019-11-26 02:08:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-26 02:08:59,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:08:59,069 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:08:59,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:59,470 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:08:59,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:08:59,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365096, now seen corresponding path program 1 times [2019-11-26 02:08:59,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:08:59,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1998339620] [2019-11-26 02:08:59,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:08:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:59,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:08:59,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:59,615 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:08:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:08:59,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998339620] [2019-11-26 02:08:59,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261512688] [2019-11-26 02:08:59,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:08:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:08:59,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-26 02:08:59,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:08:59,753 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 02:08:59,754 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:08:59,760 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:08:59,761 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:08:59,761 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:08:59,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:08:59,867 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:00,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:09:00,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:09:00,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266370671] [2019-11-26 02:09:00,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:09:00,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:00,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:09:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:09:00,304 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 14 states. [2019-11-26 02:09:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:00,972 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2019-11-26 02:09:00,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:09:00,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-11-26 02:09:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:00,974 INFO L225 Difference]: With dead ends: 111 [2019-11-26 02:09:00,974 INFO L226 Difference]: Without dead ends: 111 [2019-11-26 02:09:00,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:09:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-26 02:09:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 64. [2019-11-26 02:09:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-26 02:09:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2019-11-26 02:09:00,977 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 16 [2019-11-26 02:09:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:00,977 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2019-11-26 02:09:00,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:09:00,977 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2019-11-26 02:09:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-26 02:09:00,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:00,978 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:01,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:01,382 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:01,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1202804242, now seen corresponding path program 1 times [2019-11-26 02:09:01,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:01,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [780897626] [2019-11-26 02:09:01,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:01,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:09:01,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:01,492 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:01,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:01,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [780897626] [2019-11-26 02:09:01,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:09:01,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:09:01,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760028112] [2019-11-26 02:09:01,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:09:01,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:09:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:09:01,495 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 6 states. [2019-11-26 02:09:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:01,565 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2019-11-26 02:09:01,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:09:01,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-26 02:09:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:01,567 INFO L225 Difference]: With dead ends: 64 [2019-11-26 02:09:01,567 INFO L226 Difference]: Without dead ends: 64 [2019-11-26 02:09:01,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:09:01,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-26 02:09:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-26 02:09:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-26 02:09:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-26 02:09:01,569 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 17 [2019-11-26 02:09:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:01,569 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-26 02:09:01,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:09:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-26 02:09:01,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:09:01,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:01,570 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:01,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:01,774 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:01,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:01,774 INFO L82 PathProgramCache]: Analyzing trace with hash 208974459, now seen corresponding path program 1 times [2019-11-26 02:09:01,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:01,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [496126685] [2019-11-26 02:09:01,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:01,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:09:01,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:01,933 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:02,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [496126685] [2019-11-26 02:09:02,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629879797] [2019-11-26 02:09:02,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:02,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:09:02,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:02,089 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 02:09:02,089 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:09:02,091 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:02,091 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:09:02,091 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:09:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:02,149 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:02,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:09:02,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 15 [2019-11-26 02:09:02,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475103412] [2019-11-26 02:09:02,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:09:02,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:09:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:09:02,195 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 7 states. [2019-11-26 02:09:02,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:02,489 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2019-11-26 02:09:02,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:09:02,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-26 02:09:02,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:02,491 INFO L225 Difference]: With dead ends: 93 [2019-11-26 02:09:02,491 INFO L226 Difference]: Without dead ends: 93 [2019-11-26 02:09:02,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:09:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-26 02:09:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2019-11-26 02:09:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-26 02:09:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-26 02:09:02,493 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 21 [2019-11-26 02:09:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:02,494 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-26 02:09:02,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:09:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-26 02:09:02,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-26 02:09:02,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:02,495 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:02,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:02,901 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash 208974460, now seen corresponding path program 1 times [2019-11-26 02:09:02,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:02,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1726710770] [2019-11-26 02:09:02,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:03,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:09:03,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:03,130 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:03,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1726710770] [2019-11-26 02:09:03,243 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242071187] [2019-11-26 02:09:03,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:03,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-26 02:09:03,330 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:03,358 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 02:09:03,358 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:09:03,367 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:03,367 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:09:03,367 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:09:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:03,518 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:03,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:09:03,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 22 [2019-11-26 02:09:03,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829480244] [2019-11-26 02:09:03,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-26 02:09:03,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-26 02:09:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2019-11-26 02:09:03,994 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 14 states. [2019-11-26 02:09:04,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:04,435 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2019-11-26 02:09:04,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:09:04,436 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-26 02:09:04,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:04,437 INFO L225 Difference]: With dead ends: 95 [2019-11-26 02:09:04,437 INFO L226 Difference]: Without dead ends: 95 [2019-11-26 02:09:04,437 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2019-11-26 02:09:04,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-26 02:09:04,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2019-11-26 02:09:04,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-26 02:09:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-11-26 02:09:04,439 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 21 [2019-11-26 02:09:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:04,439 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-11-26 02:09:04,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-26 02:09:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-11-26 02:09:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-26 02:09:04,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:04,440 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:04,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:04,841 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2132003021, now seen corresponding path program 1 times [2019-11-26 02:09:04,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:04,842 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [914062551] [2019-11-26 02:09:04,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:04,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:09:04,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:04,960 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:04,962 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [914062551] [2019-11-26 02:09:04,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:09:04,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-26 02:09:04,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033186774] [2019-11-26 02:09:04,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:09:04,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:04,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:09:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:09:04,963 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 6 states. [2019-11-26 02:09:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:05,017 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2019-11-26 02:09:05,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:09:05,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-26 02:09:05,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:05,018 INFO L225 Difference]: With dead ends: 60 [2019-11-26 02:09:05,018 INFO L226 Difference]: Without dead ends: 60 [2019-11-26 02:09:05,019 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-26 02:09:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-26 02:09:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-26 02:09:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-26 02:09:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-11-26 02:09:05,020 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 24 [2019-11-26 02:09:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:05,021 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-11-26 02:09:05,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:09:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-11-26 02:09:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-26 02:09:05,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:05,022 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:05,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:05,223 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:05,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:05,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1721324957, now seen corresponding path program 1 times [2019-11-26 02:09:05,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:05,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1427563319] [2019-11-26 02:09:05,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:05,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:09:05,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:05,429 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:05,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1427563319] [2019-11-26 02:09:05,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:09:05,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2019-11-26 02:09:05,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102929621] [2019-11-26 02:09:05,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-26 02:09:05,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:05,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-26 02:09:05,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-26 02:09:05,434 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 7 states. [2019-11-26 02:09:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:05,528 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-26 02:09:05,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:09:05,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-26 02:09:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:05,530 INFO L225 Difference]: With dead ends: 60 [2019-11-26 02:09:05,530 INFO L226 Difference]: Without dead ends: 60 [2019-11-26 02:09:05,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-26 02:09:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-26 02:09:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-11-26 02:09:05,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-26 02:09:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-26 02:09:05,532 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 29 [2019-11-26 02:09:05,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:05,532 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-26 02:09:05,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-26 02:09:05,533 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-26 02:09:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-26 02:09:05,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:05,534 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:05,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:05,740 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1721326430, now seen corresponding path program 1 times [2019-11-26 02:09:05,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:05,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [921549215] [2019-11-26 02:09:05,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:05,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:09:05,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:05,948 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:06,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [921549215] [2019-11-26 02:09:06,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866069416] [2019-11-26 02:09:06,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:06,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-26 02:09:06,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:06,107 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 02:09:06,107 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:09:06,111 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:06,111 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:09:06,111 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:09:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:06,240 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:06,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:09:06,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 24 [2019-11-26 02:09:06,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397896796] [2019-11-26 02:09:06,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-26 02:09:06,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-26 02:09:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2019-11-26 02:09:06,775 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 16 states. [2019-11-26 02:09:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:07,268 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-26 02:09:07,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:09:07,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2019-11-26 02:09:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:07,270 INFO L225 Difference]: With dead ends: 58 [2019-11-26 02:09:07,270 INFO L226 Difference]: Without dead ends: 58 [2019-11-26 02:09:07,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2019-11-26 02:09:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-26 02:09:07,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-26 02:09:07,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-26 02:09:07,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-26 02:09:07,272 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 29 [2019-11-26 02:09:07,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:07,272 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-26 02:09:07,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-26 02:09:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-26 02:09:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-26 02:09:07,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:07,272 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:07,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:07,675 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1721326431, now seen corresponding path program 1 times [2019-11-26 02:09:07,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:07,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1795405223] [2019-11-26 02:09:07,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:07,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:09:07,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:07,871 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:07,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795405223] [2019-11-26 02:09:07,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227637349] [2019-11-26 02:09:07,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:08,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-26 02:09:08,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:08,028 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 02:09:08,028 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:09:08,030 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:08,030 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:09:08,030 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:09:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:08,107 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:08,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:09:08,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 16 [2019-11-26 02:09:08,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880413992] [2019-11-26 02:09:08,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-26 02:09:08,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-26 02:09:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-11-26 02:09:08,125 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 8 states. [2019-11-26 02:09:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:08,407 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-26 02:09:08,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-26 02:09:08,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-26 02:09:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:08,408 INFO L225 Difference]: With dead ends: 60 [2019-11-26 02:09:08,408 INFO L226 Difference]: Without dead ends: 60 [2019-11-26 02:09:08,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2019-11-26 02:09:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-26 02:09:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-11-26 02:09:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-26 02:09:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-26 02:09:08,410 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 29 [2019-11-26 02:09:08,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:08,410 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-26 02:09:08,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-26 02:09:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-26 02:09:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-26 02:09:08,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:08,411 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:08,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:08,816 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:08,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1851477083, now seen corresponding path program 1 times [2019-11-26 02:09:08,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:08,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [64640138] [2019-11-26 02:09:08,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:09,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:09:09,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:09,050 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:09,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64640138] [2019-11-26 02:09:09,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511739308] [2019-11-26 02:09:09,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:09,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-26 02:09:09,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:09,225 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 02:09:09,225 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:09:09,227 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:09,227 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:09:09,228 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:09:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:09,320 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:09,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:09:09,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6] total 17 [2019-11-26 02:09:09,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141891207] [2019-11-26 02:09:09,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-26 02:09:09,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:09,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-26 02:09:09,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:09:09,356 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 9 states. [2019-11-26 02:09:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:09,714 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2019-11-26 02:09:09,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:09:09,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-11-26 02:09:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:09,715 INFO L225 Difference]: With dead ends: 58 [2019-11-26 02:09:09,715 INFO L226 Difference]: Without dead ends: 58 [2019-11-26 02:09:09,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2019-11-26 02:09:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-26 02:09:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2019-11-26 02:09:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-26 02:09:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-26 02:09:09,717 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 35 [2019-11-26 02:09:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:09,717 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-26 02:09:09,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-26 02:09:09,718 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-26 02:09:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-26 02:09:09,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:09:09,718 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:09:10,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 cvc4 --incremental --print-success --lang smt --rewrite-divk,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:10,119 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE]=== [2019-11-26 02:09:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:09:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1851477082, now seen corresponding path program 1 times [2019-11-26 02:09:10,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:09:10,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [361299046] [2019-11-26 02:09:10,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/cvc4 Starting monitored process 32 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:10,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-26 02:09:10,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:10,360 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:09:10,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [361299046] [2019-11-26 02:09:10,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540101316] [2019-11-26 02:09:10,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:09:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:09:10,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:09:10,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:09:10,726 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 37 [2019-11-26 02:09:10,727 INFO L343 Elim1Store]: treesize reduction 285, result has 21.5 percent of original size [2019-11-26 02:09:10,727 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 123 [2019-11-26 02:09:10,750 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:09:10,750 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 24 [2019-11-26 02:09:10,751 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:09:10,759 INFO L567 ElimStorePlain]: treesize reduction 13, result has 7.1 percent of original size [2019-11-26 02:09:10,759 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:09:10,760 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:10,760 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:09:10,761 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:1 [2019-11-26 02:09:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:10,762 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:09:11,189 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2019-11-26 02:09:11,190 INFO L343 Elim1Store]: treesize reduction 285, result has 28.7 percent of original size [2019-11-26 02:09:11,190 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 79 treesize of output 135 [2019-11-26 02:09:11,196 INFO L343 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2019-11-26 02:09:11,196 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 25 [2019-11-26 02:09:11,196 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:09:11,198 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:11,198 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:09:11,200 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:09:11,200 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-26 02:09:11,200 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:79, output treesize:12 [2019-11-26 02:09:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-26 02:09:11,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2019-11-26 02:09:11,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 8] imperfect sequences [6, 6] total 19 [2019-11-26 02:09:11,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879574252] [2019-11-26 02:09:11,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-26 02:09:11,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:09:11,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-26 02:09:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:09:11,240 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 11 states. [2019-11-26 02:09:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:09:11,390 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-26 02:09:11,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:09:11,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-11-26 02:09:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:09:11,390 INFO L225 Difference]: With dead ends: 31 [2019-11-26 02:09:11,390 INFO L226 Difference]: Without dead ends: 0 [2019-11-26 02:09:11,391 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-11-26 02:09:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-26 02:09:11,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-26 02:09:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-26 02:09:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-26 02:09:11,391 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2019-11-26 02:09:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:09:11,391 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-26 02:09:11,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-26 02:09:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-26 02:09:11,391 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-26 02:09:11,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:09:11,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:09:11 BoogieIcfgContainer [2019-11-26 02:09:11,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:09:11,796 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:09:11,796 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:09:11,796 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:09:11,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:08:50" (3/4) ... [2019-11-26 02:09:11,798 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-26 02:09:11,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 29 nodes and edges [2019-11-26 02:09:11,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2019-11-26 02:09:11,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-26 02:09:11,810 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-26 02:09:11,859 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1a53587f-c075-4767-adc7-4b06fe715e30/bin/utaipan/witness.graphml [2019-11-26 02:09:11,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:09:11,861 INFO L168 Benchmark]: Toolchain (without parser) took 23371.93 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 230.7 MB). Free memory was 944.7 MB in the beginning and 1.0 GB in the end (delta: -55.4 MB). Peak memory consumption was 175.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:11,861 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:09:11,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 802.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -208.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:11,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:11,862 INFO L168 Benchmark]: Boogie Preprocessor took 76.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:09:11,863 INFO L168 Benchmark]: RCFGBuilder took 774.18 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: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:11,863 INFO L168 Benchmark]: TraceAbstraction took 21566.36 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 38.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 95.7 MB). Peak memory consumption was 134.0 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:11,863 INFO L168 Benchmark]: Witness Printer took 63.92 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:09:11,865 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 802.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 192.4 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -208.6 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 85.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 76.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 774.18 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: 43.9 MB). Peak memory consumption was 43.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21566.36 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 38.3 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 95.7 MB). Peak memory consumption was 134.0 MB. Max. memory is 11.5 GB. * Witness Printer took 63.92 ms. Allocated memory is still 1.3 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 682]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 682]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 540]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 658]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 658]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 660]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 660]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 668]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 702]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 666]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 699]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 700]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 763]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 25 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 72 locations, 25 error locations. Result: SAFE, OverallTime: 21.5s, OverallIterations: 22, TraceHistogramMax: 2, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1564 SDtfs, 4888 SDslu, 2289 SDs, 0 SdLazy, 1510 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1234 GetRequests, 952 SyntacticMatches, 6 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 22 MinimizatonAttempts, 787 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 615 NumberOfCodeBlocks, 615 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 1166 ConstructedInterpolants, 1 QuantifiedInterpolants, 116072 SizeOfPredicates, 238 NumberOfNonLiveVariables, 3521 ConjunctsInSsa, 303 ConjunctsInUnsatCore, 64 InterpolantComputations, 44 PerfectInterpolantSequences, 84/144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...