./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 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_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 276936ba1494f32a328b3de86f664a380d5263e9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-678e011 [2019-11-20 04:56:18,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:56:18,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:56:18,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:56:18,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:56:18,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:56:18,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:56:18,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:56:18,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:56:18,357 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:56:18,358 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:56:18,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:56:18,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:56:18,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:56:18,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:56:18,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:56:18,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:56:18,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:56:18,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:56:18,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:56:18,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:56:18,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:56:18,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:56:18,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:56:18,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:56:18,383 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:56:18,383 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:56:18,385 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:56:18,385 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:56:18,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:56:18,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:56:18,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:56:18,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:56:18,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:56:18,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:56:18,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:56:18,389 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:56:18,389 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:56:18,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:56:18,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:56:18,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:56:18,391 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 04:56:18,411 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:56:18,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:56:18,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:56:18,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:56:18,414 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:56:18,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:56:18,415 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:56:18,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 04:56:18,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:56:18,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:56:18,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:56:18,416 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 04:56:18,417 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 04:56:18,417 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 04:56:18,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:56:18,417 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 04:56:18,418 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 04:56:18,418 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:56:18,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:56:18,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:56:18,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:56:18,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:56:18,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:56:18,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:56:18,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:56:18,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:56:18,420 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 04:56:18,420 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 04:56:18,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 04:56:18,420 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_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 276936ba1494f32a328b3de86f664a380d5263e9 [2019-11-20 04:56:18,578 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:56:18,588 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:56:18,593 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:56:18,594 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:56:18,597 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:56:18,597 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2019-11-20 04:56:18,661 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/data/91cbb89be/80306d9ab1854158b832a196a65c3cd0/FLAGc37c0cf4e [2019-11-20 04:56:19,122 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:56:19,122 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2019-11-20 04:56:19,140 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/data/91cbb89be/80306d9ab1854158b832a196a65c3cd0/FLAGc37c0cf4e [2019-11-20 04:56:19,485 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/data/91cbb89be/80306d9ab1854158b832a196a65c3cd0 [2019-11-20 04:56:19,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:56:19,488 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 04:56:19,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:56:19,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:56:19,492 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:56:19,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:56:19" (1/1) ... [2019-11-20 04:56:19,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c502a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:19, skipping insertion in model container [2019-11-20 04:56:19,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:56:19" (1/1) ... [2019-11-20 04:56:19,502 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:56:19,544 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:56:19,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:56:19,909 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:56:19,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:56:20,021 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:56:20,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20 WrapperNode [2019-11-20 04:56:20,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:56:20,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:56:20,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:56:20,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:56:20,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... [2019-11-20 04:56:20,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... [2019-11-20 04:56:20,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... [2019-11-20 04:56:20,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... [2019-11-20 04:56:20,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... [2019-11-20 04:56:20,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... [2019-11-20 04:56:20,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... [2019-11-20 04:56:20,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:56:20,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:56:20,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:56:20,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:56:20,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:56:20,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 04:56:20,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:56:20,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 04:56:20,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 04:56:20,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 04:56:20,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 04:56:20,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 04:56:20,145 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2019-11-20 04:56:20,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 04:56:20,146 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 04:56:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 04:56:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 04:56:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 04:56:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 04:56:20,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 04:56:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 04:56:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 04:56:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 04:56:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 04:56:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 04:56:20,149 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 04:56:20,150 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 04:56:20,151 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 04:56:20,152 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 04:56:20,153 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 04:56:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 04:56:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 04:56:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 04:56:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 04:56:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 04:56:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 04:56:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 04:56:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 04:56:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 04:56:20,155 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 04:56:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 04:56:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 04:56:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 04:56:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 04:56:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 04:56:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 04:56:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 04:56:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 04:56:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 04:56:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 04:56:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 04:56:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 04:56:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 04:56:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 04:56:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 04:56:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 04:56:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 04:56:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 04:56:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 04:56:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 04:56:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 04:56:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 04:56:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 04:56:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 04:56:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 04:56:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 04:56:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 04:56:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 04:56:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2019-11-20 04:56:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 04:56:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 04:56:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 04:56:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 04:56:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:56:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 04:56:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:56:20,730 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:56:20,730 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 04:56:20,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:56:20 BoogieIcfgContainer [2019-11-20 04:56:20,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:56:20,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:56:20,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:56:20,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:56:20,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:56:19" (1/3) ... [2019-11-20 04:56:20,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cdcb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:56:20, skipping insertion in model container [2019-11-20 04:56:20,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:56:20" (2/3) ... [2019-11-20 04:56:20,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28cdcb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:56:20, skipping insertion in model container [2019-11-20 04:56:20,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:56:20" (3/3) ... [2019-11-20 04:56:20,737 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2019-11-20 04:56:20,746 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:56:20,752 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2019-11-20 04:56:20,762 INFO L249 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2019-11-20 04:56:20,779 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:56:20,780 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 04:56:20,780 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:56:20,780 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:56:20,780 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:56:20,780 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:56:20,780 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:56:20,780 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:56:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-11-20 04:56:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:56:20,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:20,800 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:20,800 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash 567613501, now seen corresponding path program 1 times [2019-11-20 04:56:20,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:20,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [934108150] [2019-11-20 04:56:20,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:20,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 04:56:20,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:21,000 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:21,016 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [934108150] [2019-11-20 04:56:21,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:21,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 04:56:21,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035300686] [2019-11-20 04:56:21,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 04:56:21,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:21,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 04:56:21,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 04:56:21,032 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-11-20 04:56:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:21,045 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-20 04:56:21,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 04:56:21,046 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-20 04:56:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:21,054 INFO L225 Difference]: With dead ends: 42 [2019-11-20 04:56:21,054 INFO L226 Difference]: Without dead ends: 39 [2019-11-20 04:56:21,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 04:56:21,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-20 04:56:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-20 04:56:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 04:56:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-20 04:56:21,082 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 10 [2019-11-20 04:56:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:21,083 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-20 04:56:21,083 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 04:56:21,083 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-20 04:56:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:56:21,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:21,083 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:21,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:21,286 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:21,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 567613191, now seen corresponding path program 1 times [2019-11-20 04:56:21,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:21,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1812290283] [2019-11-20 04:56:21,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:21,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 04:56:21,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:21,497 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 [2019-11-20 04:56:21,497 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:21,500 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:21,501 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:21,501 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:56:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:21,509 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:21,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1812290283] [2019-11-20 04:56:21,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:21,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 04:56:21,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108247661] [2019-11-20 04:56:21,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:56:21,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:56:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:56:21,522 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 3 states. [2019-11-20 04:56:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:21,613 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-11-20 04:56:21,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:56:21,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-20 04:56:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:21,615 INFO L225 Difference]: With dead ends: 37 [2019-11-20 04:56:21,615 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 04:56:21,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:56:21,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 04:56:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-20 04:56:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 04:56:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-11-20 04:56:21,620 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 10 [2019-11-20 04:56:21,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:21,620 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-11-20 04:56:21,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:56:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-11-20 04:56:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:56:21,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:21,621 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:21,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:21,826 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash 567613192, now seen corresponding path program 1 times [2019-11-20 04:56:21,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:21,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1622342379] [2019-11-20 04:56:21,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:21,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:56:21,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:22,008 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 [2019-11-20 04:56:22,009 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:22,021 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:22,021 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:22,021 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 04:56:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:22,039 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:22,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1622342379] [2019-11-20 04:56:22,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:22,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 04:56:22,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469212611] [2019-11-20 04:56:22,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:56:22,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:56:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:56:22,181 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 6 states. [2019-11-20 04:56:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:22,471 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-20 04:56:22,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:56:22,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 04:56:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:22,483 INFO L225 Difference]: With dead ends: 47 [2019-11-20 04:56:22,483 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 04:56:22,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:56:22,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 04:56:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2019-11-20 04:56:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-20 04:56:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-20 04:56:22,492 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 10 [2019-11-20 04:56:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:22,492 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-20 04:56:22,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:56:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-20 04:56:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:56:22,493 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:22,493 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:22,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:22,704 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:22,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:22,704 INFO L82 PathProgramCache]: Analyzing trace with hash 567613245, now seen corresponding path program 1 times [2019-11-20 04:56:22,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:22,705 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [90521279] [2019-11-20 04:56:22,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:22,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 04:56:22,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:22,897 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:22,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [90521279] [2019-11-20 04:56:22,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:22,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 04:56:22,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197362202] [2019-11-20 04:56:22,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:56:22,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:22,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:56:22,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:56:22,942 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 6 states. [2019-11-20 04:56:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:23,018 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2019-11-20 04:56:23,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:56:23,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 04:56:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:23,020 INFO L225 Difference]: With dead ends: 43 [2019-11-20 04:56:23,020 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 04:56:23,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:56:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 04:56:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-11-20 04:56:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 04:56:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-20 04:56:23,025 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 10 [2019-11-20 04:56:23,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:23,026 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-20 04:56:23,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:56:23,026 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-20 04:56:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:56:23,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:23,027 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:23,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:23,235 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:23,235 INFO L82 PathProgramCache]: Analyzing trace with hash 567672827, now seen corresponding path program 1 times [2019-11-20 04:56:23,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:23,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [640740362] [2019-11-20 04:56:23,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:23,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:56:23,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:23,420 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 [2019-11-20 04:56:23,420 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:23,439 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:23,440 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:23,440 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2019-11-20 04:56:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:23,466 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:23,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [640740362] [2019-11-20 04:56:23,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:23,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 04:56:23,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223385306] [2019-11-20 04:56:23,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:56:23,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:23,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:56:23,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:56:23,599 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2019-11-20 04:56:23,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:23,866 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-20 04:56:23,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:56:23,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-20 04:56:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:23,868 INFO L225 Difference]: With dead ends: 47 [2019-11-20 04:56:23,868 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 04:56:23,869 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:56:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 04:56:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-11-20 04:56:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 04:56:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-11-20 04:56:23,873 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 10 [2019-11-20 04:56:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:23,874 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-11-20 04:56:23,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:56:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-11-20 04:56:23,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 04:56:23,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:23,875 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:24,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:24,076 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:24,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:24,076 INFO L82 PathProgramCache]: Analyzing trace with hash 478380693, now seen corresponding path program 1 times [2019-11-20 04:56:24,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:24,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1797507666] [2019-11-20 04:56:24,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:24,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:56:24,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:24,244 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 [2019-11-20 04:56:24,244 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:24,246 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:24,247 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:24,247 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:56:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:24,265 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:24,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1797507666] [2019-11-20 04:56:24,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:24,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-20 04:56:24,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693117464] [2019-11-20 04:56:24,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:56:24,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:56:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:56:24,277 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 5 states. [2019-11-20 04:56:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:24,400 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-20 04:56:24,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:56:24,401 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-20 04:56:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:24,402 INFO L225 Difference]: With dead ends: 37 [2019-11-20 04:56:24,402 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 04:56:24,402 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:56:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 04:56:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-20 04:56:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 04:56:24,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-11-20 04:56:24,405 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2019-11-20 04:56:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:24,405 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-11-20 04:56:24,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:56:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-11-20 04:56:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 04:56:24,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:24,406 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:24,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:24,607 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 478380694, now seen corresponding path program 1 times [2019-11-20 04:56:24,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:24,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1575721172] [2019-11-20 04:56:24,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:24,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:56:24,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:24,801 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 [2019-11-20 04:56:24,801 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:24,808 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:24,809 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:24,809 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 04:56:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:24,865 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:25,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:25,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575721172] [2019-11-20 04:56:25,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:25,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 04:56:25,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086115808] [2019-11-20 04:56:25,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:56:25,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:25,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:56:25,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:56:25,096 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 10 states. [2019-11-20 04:56:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:25,687 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2019-11-20 04:56:25,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 04:56:25,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-20 04:56:25,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:25,689 INFO L225 Difference]: With dead ends: 65 [2019-11-20 04:56:25,690 INFO L226 Difference]: Without dead ends: 65 [2019-11-20 04:56:25,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-20 04:56:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-20 04:56:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 36. [2019-11-20 04:56:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-20 04:56:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-11-20 04:56:25,694 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 13 [2019-11-20 04:56:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:25,694 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-11-20 04:56:25,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:56:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-11-20 04:56:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 04:56:25,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:25,695 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:25,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:25,896 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:25,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1183967934, now seen corresponding path program 1 times [2019-11-20 04:56:25,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:25,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [512831629] [2019-11-20 04:56:25,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:26,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:56:26,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:26,039 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 [2019-11-20 04:56:26,039 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:26,050 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:26,050 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:26,050 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 04:56:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:26,146 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:26,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [512831629] [2019-11-20 04:56:26,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:56:26,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 04:56:26,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463862647] [2019-11-20 04:56:26,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:56:26,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:26,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:56:26,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:56:26,590 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 10 states. [2019-11-20 04:56:27,637 WARN L191 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2019-11-20 04:56:27,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:27,975 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2019-11-20 04:56:27,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:56:27,978 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-11-20 04:56:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:27,979 INFO L225 Difference]: With dead ends: 59 [2019-11-20 04:56:27,979 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 04:56:27,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 04:56:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 04:56:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2019-11-20 04:56:27,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 04:56:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2019-11-20 04:56:27,986 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 14 [2019-11-20 04:56:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:27,987 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2019-11-20 04:56:27,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:56:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2019-11-20 04:56:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 04:56:27,988 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:27,988 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:28,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:28,191 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:28,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:28,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1394405037, now seen corresponding path program 1 times [2019-11-20 04:56:28,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:28,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [20033599] [2019-11-20 04:56:28,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:28,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 04:56:28,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:28,313 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:28,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [20033599] [2019-11-20 04:56:28,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:28,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 04:56:28,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847784060] [2019-11-20 04:56:28,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:56:28,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:56:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:56:28,320 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 3 states. [2019-11-20 04:56:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:28,330 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-20 04:56:28,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:56:28,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-20 04:56:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:28,332 INFO L225 Difference]: With dead ends: 45 [2019-11-20 04:56:28,332 INFO L226 Difference]: Without dead ends: 45 [2019-11-20 04:56:28,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:56:28,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-20 04:56:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-20 04:56:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-20 04:56:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2019-11-20 04:56:28,335 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 17 [2019-11-20 04:56:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:28,336 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2019-11-20 04:56:28,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:56:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2019-11-20 04:56:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 04:56:28,337 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:28,337 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:28,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:28,543 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:28,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:28,543 INFO L82 PathProgramCache]: Analyzing trace with hash -12416150, now seen corresponding path program 1 times [2019-11-20 04:56:28,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:28,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1849002460] [2019-11-20 04:56:28,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:28,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 04:56:28,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:28,695 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 12 treesize of output 8 [2019-11-20 04:56:28,696 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:28,706 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:28,706 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:28,706 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-20 04:56:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:28,785 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:28,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:28,883 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-11-20 04:56:28,891 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 04:56:28,893 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 04:56:28,902 INFO L567 ElimStorePlain]: treesize reduction 7, result has 46.2 percent of original size [2019-11-20 04:56:28,902 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:28,904 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:28,905 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:28,905 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2019-11-20 04:56:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:28,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1849002460] [2019-11-20 04:56:28,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:28,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 14 [2019-11-20 04:56:28,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45945913] [2019-11-20 04:56:28,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 04:56:28,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 04:56:28,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-11-20 04:56:28,913 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 14 states. [2019-11-20 04:56:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:29,151 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2019-11-20 04:56:29,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:56:29,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 19 [2019-11-20 04:56:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:29,153 INFO L225 Difference]: With dead ends: 60 [2019-11-20 04:56:29,153 INFO L226 Difference]: Without dead ends: 60 [2019-11-20 04:56:29,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-11-20 04:56:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-20 04:56:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2019-11-20 04:56:29,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-20 04:56:29,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-11-20 04:56:29,158 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 19 [2019-11-20 04:56:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:29,158 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-11-20 04:56:29,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 04:56:29,158 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-11-20 04:56:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 04:56:29,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:29,164 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:29,365 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:29,365 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:29,365 INFO L82 PathProgramCache]: Analyzing trace with hash -599222164, now seen corresponding path program 1 times [2019-11-20 04:56:29,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:29,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1587969883] [2019-11-20 04:56:29,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:29,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 04:56:29,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:29,543 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 [2019-11-20 04:56:29,543 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:29,558 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:29,558 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:29,559 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2019-11-20 04:56:29,592 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2019-11-20 04:56:29,592 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:29,634 INFO L567 ElimStorePlain]: treesize reduction 20, result has 53.5 percent of original size [2019-11-20 04:56:29,634 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:29,634 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:23 [2019-11-20 04:56:29,888 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:29,889 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-11-20 04:56:29,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:29,891 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 04:56:29,921 INFO L567 ElimStorePlain]: treesize reduction 8, result has 69.2 percent of original size [2019-11-20 04:56:29,921 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:29,921 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2019-11-20 04:56:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:30,037 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:30,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:30,722 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2019-11-20 04:56:30,729 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 04:56:30,736 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 04:56:30,749 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2019-11-20 04:56:30,750 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:30,771 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:30,771 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:30,789 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2019-11-20 04:56:30,815 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 04:56:30,816 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 04:56:30,901 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 04:56:30,901 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:30,915 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2019-11-20 04:56:30,933 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 04:56:30,934 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2019-11-20 04:56:30,989 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 04:56:30,989 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:31,064 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:31,064 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 04:56:31,065 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:119, output treesize:83 [2019-11-20 04:56:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:31,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1587969883] [2019-11-20 04:56:31,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:56:31,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2019-11-20 04:56:31,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850390011] [2019-11-20 04:56:31,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 04:56:31,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:31,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 04:56:31,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:56:31,322 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 20 states. [2019-11-20 04:56:31,598 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-20 04:56:39,843 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-11-20 04:56:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:41,975 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2019-11-20 04:56:41,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:56:41,976 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-11-20 04:56:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:41,977 INFO L225 Difference]: With dead ends: 91 [2019-11-20 04:56:41,977 INFO L226 Difference]: Without dead ends: 91 [2019-11-20 04:56:41,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 04:56:41,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-20 04:56:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2019-11-20 04:56:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-20 04:56:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2019-11-20 04:56:41,984 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 19 [2019-11-20 04:56:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:41,985 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2019-11-20 04:56:41,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 04:56:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2019-11-20 04:56:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:56:41,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:41,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:42,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:42,189 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:42,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:42,190 INFO L82 PathProgramCache]: Analyzing trace with hash -416151240, now seen corresponding path program 1 times [2019-11-20 04:56:42,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:42,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1038880221] [2019-11-20 04:56:42,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:56:42,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:56:42,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:42,338 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 [2019-11-20 04:56:42,338 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:42,340 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:42,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:42,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:56:42,374 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:42,374 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-11-20 04:56:42,375 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:42,387 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-20 04:56:42,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,389 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:56:42,389 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2019-11-20 04:56:42,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,404 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:56:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:42,536 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:56:46,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038880221] [2019-11-20 04:56:46,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:56:46,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2019-11-20 04:56:46,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082264929] [2019-11-20 04:56:46,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 04:56:46,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 04:56:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=49, Unknown=2, NotChecked=0, Total=72 [2019-11-20 04:56:46,626 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 9 states. [2019-11-20 04:56:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:56:46,764 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2019-11-20 04:56:46,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:56:46,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2019-11-20 04:56:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:56:46,766 INFO L225 Difference]: With dead ends: 68 [2019-11-20 04:56:46,766 INFO L226 Difference]: Without dead ends: 46 [2019-11-20 04:56:46,766 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 11 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=34, Invalid=74, Unknown=2, NotChecked=0, Total=110 [2019-11-20 04:56:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-20 04:56:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-20 04:56:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-20 04:56:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-20 04:56:46,769 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2019-11-20 04:56:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:56:46,770 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-20 04:56:46,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 04:56:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-20 04:56:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 04:56:46,770 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:56:46,771 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:56:46,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:56:46,971 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:56:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:56:46,971 INFO L82 PathProgramCache]: Analyzing trace with hash 962016196, now seen corresponding path program 2 times [2019-11-20 04:56:46,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:56:46,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1152269049] [2019-11-20 04:56:46,972 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/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 [2019-11-20 04:56:47,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:56:47,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:56:47,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:56:47,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:56:47,150 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 [2019-11-20 04:56:47,150 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:56:47,159 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:56:47,159 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:56:47,160 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2019-11-20 04:56:47,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 04:56:47,364 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:56:48,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 04:56:49,705 WARN L191 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-11-20 04:56:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 04:56:58,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1152269049] [2019-11-20 04:56:58,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:56:58,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 04:56:58,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32471862] [2019-11-20 04:56:58,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 04:56:58,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:56:58,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 04:56:58,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2019-11-20 04:56:58,883 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 12 states. [2019-11-20 04:57:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:57:00,033 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-11-20 04:57:00,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:57:00,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-11-20 04:57:00,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:57:00,035 INFO L225 Difference]: With dead ends: 49 [2019-11-20 04:57:00,035 INFO L226 Difference]: Without dead ends: 49 [2019-11-20 04:57:00,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=76, Invalid=133, Unknown=1, NotChecked=0, Total=210 [2019-11-20 04:57:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-20 04:57:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-11-20 04:57:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 04:57:00,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-20 04:57:00,039 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 22 [2019-11-20 04:57:00,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:57:00,039 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-20 04:57:00,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 04:57:00,039 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-20 04:57:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 04:57:00,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:57:00,040 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:57:00,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:00,240 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:57:00,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:57:00,241 INFO L82 PathProgramCache]: Analyzing trace with hash -124147180, now seen corresponding path program 2 times [2019-11-20 04:57:00,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:57:00,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [139937880] [2019-11-20 04:57:00,241 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/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 [2019-11-20 04:57:00,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:57:00,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:57:00,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 04:57:00,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:57:00,436 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 [2019-11-20 04:57:00,436 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:00,447 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:00,447 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:00,447 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 04:57:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 04:57:00,598 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:57:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:01,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [139937880] [2019-11-20 04:57:01,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:57:01,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2019-11-20 04:57:01,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95884623] [2019-11-20 04:57:01,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 04:57:01,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:57:01,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 04:57:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-20 04:57:01,671 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-11-20 04:57:02,702 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-20 04:57:03,017 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 04:57:03,524 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-20 04:57:03,811 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 04:57:04,116 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2019-11-20 04:57:04,494 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2019-11-20 04:57:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:57:04,872 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2019-11-20 04:57:04,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:57:04,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2019-11-20 04:57:04,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:57:04,875 INFO L225 Difference]: With dead ends: 79 [2019-11-20 04:57:04,875 INFO L226 Difference]: Without dead ends: 69 [2019-11-20 04:57:04,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2019-11-20 04:57:04,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-20 04:57:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2019-11-20 04:57:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-20 04:57:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-11-20 04:57:04,879 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 31 [2019-11-20 04:57:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:57:04,879 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-11-20 04:57:04,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 04:57:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-11-20 04:57:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 04:57:04,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:57:04,881 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:57:05,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:05,088 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:57:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:57:05,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2103102926, now seen corresponding path program 1 times [2019-11-20 04:57:05,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:57:05,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1672697718] [2019-11-20 04:57:05,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:57:05,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-20 04:57:05,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:57:05,570 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2019-11-20 04:57:05,571 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:05,584 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:05,585 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:57:05,585 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2019-11-20 04:57:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:06,017 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:57:06,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:57:06,388 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2019-11-20 04:57:06,390 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-20 04:57:06,391 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 04:57:06,395 INFO L567 ElimStorePlain]: treesize reduction 7, result has 53.3 percent of original size [2019-11-20 04:57:06,395 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:06,396 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:06,396 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:06,396 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:18, output treesize:8 [2019-11-20 04:57:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:06,891 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1672697718] [2019-11-20 04:57:06,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:57:06,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2019-11-20 04:57:06,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975859186] [2019-11-20 04:57:06,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 04:57:06,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:57:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 04:57:06,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2019-11-20 04:57:06,893 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 29 states. [2019-11-20 04:57:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:57:08,472 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2019-11-20 04:57:08,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:57:08,473 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 39 [2019-11-20 04:57:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:57:08,474 INFO L225 Difference]: With dead ends: 74 [2019-11-20 04:57:08,474 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 04:57:08,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 04:57:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 04:57:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-11-20 04:57:08,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 04:57:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-11-20 04:57:08,478 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 39 [2019-11-20 04:57:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:57:08,479 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-11-20 04:57:08,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 04:57:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-11-20 04:57:08,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 04:57:08,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:57:08,480 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:57:08,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:08,684 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:57:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:57:08,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1300959173, now seen corresponding path program 2 times [2019-11-20 04:57:08,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:57:08,684 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1082936394] [2019-11-20 04:57:08,684 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/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 [2019-11-20 04:57:08,885 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:57:08,885 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:57:08,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 04:57:08,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:57:08,893 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 [2019-11-20 04:57:08,893 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:08,900 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:08,900 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:08,900 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 04:57:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 04:57:09,182 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:57:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 04:57:09,655 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1082936394] [2019-11-20 04:57:09,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:57:09,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-20 04:57:09,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352070986] [2019-11-20 04:57:09,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 04:57:09,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:57:09,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 04:57:09,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-11-20 04:57:09,656 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 18 states. [2019-11-20 04:57:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:57:10,264 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-20 04:57:10,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 04:57:10,265 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2019-11-20 04:57:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:57:10,266 INFO L225 Difference]: With dead ends: 60 [2019-11-20 04:57:10,266 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 04:57:10,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2019-11-20 04:57:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 04:57:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-20 04:57:10,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-20 04:57:10,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-20 04:57:10,268 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2019-11-20 04:57:10,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:57:10,269 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-20 04:57:10,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 04:57:10,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-20 04:57:10,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-20 04:57:10,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:57:10,270 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:57:10,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:10,470 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:57:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:57:10,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1897538069, now seen corresponding path program 3 times [2019-11-20 04:57:10,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:57:10,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1575282318] [2019-11-20 04:57:10,471 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:10,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 04:57:10,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:57:10,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 04:57:10,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:57:10,755 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 [2019-11-20 04:57:10,755 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:10,765 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:10,765 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:10,765 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 04:57:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:11,267 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:57:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:13,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575282318] [2019-11-20 04:57:13,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:57:13,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2019-11-20 04:57:13,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525922505] [2019-11-20 04:57:13,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-20 04:57:13,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:57:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-20 04:57:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2019-11-20 04:57:13,489 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 29 states. [2019-11-20 04:57:16,331 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2019-11-20 04:57:16,994 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2019-11-20 04:57:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:57:17,882 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2019-11-20 04:57:17,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 04:57:17,883 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 43 [2019-11-20 04:57:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:57:17,883 INFO L225 Difference]: With dead ends: 91 [2019-11-20 04:57:17,884 INFO L226 Difference]: Without dead ends: 91 [2019-11-20 04:57:17,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 04:57:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-20 04:57:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 50. [2019-11-20 04:57:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 04:57:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-20 04:57:17,887 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2019-11-20 04:57:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:57:17,887 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-20 04:57:17,887 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-20 04:57:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-20 04:57:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-20 04:57:17,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:57:17,888 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:57:18,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:18,089 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:57:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:57:18,089 INFO L82 PathProgramCache]: Analyzing trace with hash 128340735, now seen corresponding path program 4 times [2019-11-20 04:57:18,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:57:18,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [224284574] [2019-11-20 04:57:18,089 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/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 [2019-11-20 04:57:18,286 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:57:18,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:57:18,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-20 04:57:18,289 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:57:18,796 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 11 [2019-11-20 04:57:18,796 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:18,814 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:18,815 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:57:18,815 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2019-11-20 04:57:19,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:19,309 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:57:19,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:57:19,794 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2019-11-20 04:57:19,796 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-20 04:57:19,797 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 04:57:19,801 INFO L567 ElimStorePlain]: treesize reduction 7, result has 53.3 percent of original size [2019-11-20 04:57:19,801 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:19,802 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:19,802 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:19,803 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:18, output treesize:8 [2019-11-20 04:57:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:20,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224284574] [2019-11-20 04:57:20,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:57:20,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-11-20 04:57:20,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708399702] [2019-11-20 04:57:20,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-20 04:57:20,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:57:20,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-20 04:57:20,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 04:57:20,789 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 35 states. [2019-11-20 04:57:22,056 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2019-11-20 04:57:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:57:22,963 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2019-11-20 04:57:22,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 04:57:22,963 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 49 [2019-11-20 04:57:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:57:22,964 INFO L225 Difference]: With dead ends: 81 [2019-11-20 04:57:22,964 INFO L226 Difference]: Without dead ends: 57 [2019-11-20 04:57:22,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 04:57:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-20 04:57:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-20 04:57:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 04:57:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-11-20 04:57:22,967 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 49 [2019-11-20 04:57:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:57:22,968 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-11-20 04:57:22,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-20 04:57:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-11-20 04:57:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-20 04:57:22,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:57:22,969 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:57:23,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:23,169 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:57:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:57:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash 277193436, now seen corresponding path program 5 times [2019-11-20 04:57:23,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:57:23,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2058627835] [2019-11-20 04:57:23,170 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/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 [2019-11-20 04:57:23,428 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-20 04:57:23,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:57:23,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-20 04:57:23,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:57:23,436 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 [2019-11-20 04:57:23,436 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:23,443 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:23,443 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:23,443 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 04:57:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:24,085 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:57:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:57:27,715 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2058627835] [2019-11-20 04:57:27,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:57:27,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2019-11-20 04:57:27,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038359782] [2019-11-20 04:57:27,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-20 04:57:27,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:57:27,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-20 04:57:27,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2019-11-20 04:57:27,717 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 32 states. [2019-11-20 04:57:29,690 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2019-11-20 04:57:30,390 WARN L191 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2019-11-20 04:57:31,125 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-20 04:57:31,717 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 04:57:32,508 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-20 04:57:33,155 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2019-11-20 04:57:34,109 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2019-11-20 04:57:35,445 WARN L191 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2019-11-20 04:57:35,933 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2019-11-20 04:57:36,517 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2019-11-20 04:57:36,942 WARN L191 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2019-11-20 04:57:37,469 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-11-20 04:57:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:57:38,317 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2019-11-20 04:57:38,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-20 04:57:38,317 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 53 [2019-11-20 04:57:38,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:57:38,318 INFO L225 Difference]: With dead ends: 134 [2019-11-20 04:57:38,318 INFO L226 Difference]: Without dead ends: 134 [2019-11-20 04:57:38,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=396, Invalid=2684, Unknown=0, NotChecked=0, Total=3080 [2019-11-20 04:57:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-20 04:57:38,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2019-11-20 04:57:38,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-20 04:57:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2019-11-20 04:57:38,323 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 53 [2019-11-20 04:57:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:57:38,325 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2019-11-20 04:57:38,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-20 04:57:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2019-11-20 04:57:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-20 04:57:38,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:57:38,327 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:57:38,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:38,531 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 04:57:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:57:38,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1474240720, now seen corresponding path program 6 times [2019-11-20 04:57:38,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:57:38,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1787024110] [2019-11-20 04:57:38,532 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:57:38,961 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-20 04:57:38,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:57:38,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-20 04:57:38,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:57:38,987 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 [2019-11-20 04:57:38,987 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:38,997 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:38,997 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:38,998 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2019-11-20 04:57:39,019 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2019-11-20 04:57:39,019 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:57:39,042 INFO L567 ElimStorePlain]: treesize reduction 13, result has 69.0 percent of original size [2019-11-20 04:57:39,042 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:39,042 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:29 [2019-11-20 04:57:39,712 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:57:39,712 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-11-20 04:57:39,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:57:39,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 04:57:39,779 INFO L567 ElimStorePlain]: treesize reduction 8, result has 79.5 percent of original size [2019-11-20 04:57:39,779 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:57:39,779 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:31 [2019-11-20 04:57:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-20 04:57:40,045 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:57:46,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:58:15,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:02:17,269 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 88 [2019-11-20 05:02:17,363 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-20 05:02:17,364 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 05:02:17,577 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-11-20 05:02:17,577 INFO L567 ElimStorePlain]: treesize reduction 39, result has 55.2 percent of original size [2019-11-20 05:02:17,578 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:02:18,148 WARN L191 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-11-20 05:02:18,149 INFO L567 ElimStorePlain]: treesize reduction 72, result has 57.9 percent of original size [2019-11-20 05:02:18,176 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 48 [2019-11-20 05:02:18,255 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2019-11-20 05:02:18,256 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 05:02:18,397 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2019-11-20 05:02:18,398 INFO L567 ElimStorePlain]: treesize reduction 7, result has 85.1 percent of original size [2019-11-20 05:02:18,398 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:02:18,597 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2019-11-20 05:02:18,597 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:02:18,598 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-20 05:02:18,598 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:181, output treesize:89 [2019-11-20 05:02:19,463 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-20 05:02:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-20 05:02:19,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787024110] [2019-11-20 05:02:19,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:02:19,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2019-11-20 05:02:19,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697405359] [2019-11-20 05:02:19,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 05:02:19,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:02:19,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 05:02:19,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=455, Unknown=21, NotChecked=0, Total=552 [2019-11-20 05:02:19,635 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 24 states. [2019-11-20 05:02:24,467 WARN L191 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2019-11-20 05:02:28,864 WARN L191 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2019-11-20 05:02:41,844 WARN L191 SmtUtils]: Spent 8.51 s on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2019-11-20 05:02:56,666 WARN L191 SmtUtils]: Spent 8.37 s on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2019-11-20 05:03:34,049 WARN L191 SmtUtils]: Spent 26.58 s on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2019-11-20 05:03:57,133 WARN L191 SmtUtils]: Spent 22.59 s on a formula simplification. DAG size of input: 101 DAG size of output: 68 [2019-11-20 05:04:30,815 WARN L191 SmtUtils]: Spent 33.19 s on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2019-11-20 05:04:46,069 WARN L191 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2019-11-20 05:04:57,313 WARN L191 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2019-11-20 05:05:22,651 WARN L191 SmtUtils]: Spent 22.74 s on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2019-11-20 05:05:45,915 WARN L191 SmtUtils]: Spent 22.78 s on a formula simplification. DAG size of input: 108 DAG size of output: 74 [2019-11-20 05:06:19,889 WARN L191 SmtUtils]: Spent 33.43 s on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2019-11-20 05:06:41,133 WARN L191 SmtUtils]: Spent 8.78 s on a formula simplification. DAG size of input: 108 DAG size of output: 75 [2019-11-20 05:06:52,575 WARN L191 SmtUtils]: Spent 8.48 s on a formula simplification. DAG size of input: 102 DAG size of output: 73 [2019-11-20 05:06:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:06:54,684 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2019-11-20 05:06:54,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-20 05:06:54,691 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 59 [2019-11-20 05:06:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:06:54,691 INFO L225 Difference]: With dead ends: 108 [2019-11-20 05:06:54,691 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 05:06:54,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 76 SyntacticMatches, 19 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 526.8s TimeCoverageRelationStatistics Valid=307, Invalid=1067, Unknown=32, NotChecked=0, Total=1406 [2019-11-20 05:06:54,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 05:06:54,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 05:06:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 05:06:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 05:06:54,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2019-11-20 05:06:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:06:54,692 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 05:06:54,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 05:06:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 05:06:54,692 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 05:06:54,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:06:54,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:06:54 BoogieIcfgContainer [2019-11-20 05:06:54,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 05:06:54,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 05:06:54,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 05:06:54,897 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 05:06:54,897 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:56:20" (3/4) ... [2019-11-20 05:06:54,899 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrchr [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-20 05:06:54,904 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-11-20 05:06:54,908 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2019-11-20 05:06:54,908 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2019-11-20 05:06:54,908 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 05:06:54,908 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 05:06:54,942 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_99004c3f-24b5-41f2-8bed-dd04ece6af30/bin/uautomizer/witness.graphml [2019-11-20 05:06:54,942 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 05:06:54,943 INFO L168 Benchmark]: Toolchain (without parser) took 635455.32 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 314.6 MB). Free memory was 938.0 MB in the beginning and 1.3 GB in the end (delta: -362.4 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 05:06:54,943 INFO L168 Benchmark]: CDTParser took 0.70 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. [2019-11-20 05:06:54,944 INFO L168 Benchmark]: CACSL2BoogieTranslator took 534.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -174.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 05:06:54,944 INFO L168 Benchmark]: Boogie Preprocessor took 55.89 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. [2019-11-20 05:06:54,945 INFO L168 Benchmark]: RCFGBuilder took 651.71 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: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 11.5 GB. [2019-11-20 05:06:54,945 INFO L168 Benchmark]: TraceAbstraction took 634164.04 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -243.7 MB). Peak memory consumption was 469.5 MB. Max. memory is 11.5 GB. [2019-11-20 05:06:54,945 INFO L168 Benchmark]: Witness Printer took 45.55 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. [2019-11-20 05:06:54,947 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.70 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 534.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 135.8 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -174.3 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 55.89 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: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 651.71 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: 50.2 MB). Peak memory consumption was 50.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 634164.04 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.8 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -243.7 MB). Peak memory consumption was 469.5 MB. Max. memory is 11.5 GB. * Witness Printer took 45.55 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 57 locations, 11 error locations. Result: SAFE, OverallTime: 634.1s, OverallIterations: 20, TraceHistogramMax: 5, AutomataDifference: 312.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 555 SDtfs, 1385 SDslu, 2917 SDs, 0 SdLazy, 3501 SolverSat, 279 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 43.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1117 GetRequests, 689 SyntacticMatches, 53 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 576.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=19, 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, 20 MinimizatonAttempts, 203 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 313.3s InterpolantComputationTime, 505 NumberOfCodeBlocks, 505 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 970 ConstructedInterpolants, 103 QuantifiedInterpolants, 771211 SizeOfPredicates, 108 NumberOfNonLiveVariables, 1527 ConjunctsInSsa, 267 ConjunctsInUnsatCore, 40 InterpolantComputations, 20 PerfectInterpolantSequences, 269/728 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...