./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext/tree_stack.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_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext/tree_stack.i -s /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 3e23c3bca784f04992b2007c94519fee617936af ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: incompatible size --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-19 23:59:16,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 23:59:16,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 23:59:16,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 23:59:16,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 23:59:16,232 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 23:59:16,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 23:59:16,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 23:59:16,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 23:59:16,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 23:59:16,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 23:59:16,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 23:59:16,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 23:59:16,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 23:59:16,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 23:59:16,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 23:59:16,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 23:59:16,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 23:59:16,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 23:59:16,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 23:59:16,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 23:59:16,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 23:59:16,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 23:59:16,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 23:59:16,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 23:59:16,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 23:59:16,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 23:59:16,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 23:59:16,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 23:59:16,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 23:59:16,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 23:59:16,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 23:59:16,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 23:59:16,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 23:59:16,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 23:59:16,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 23:59:16,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 23:59:16,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 23:59:16,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 23:59:16,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 23:59:16,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 23:59:16,281 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 23:59:16,304 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 23:59:16,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 23:59:16,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 23:59:16,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 23:59:16,306 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 23:59:16,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 23:59:16,306 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 23:59:16,307 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 23:59:16,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 23:59:16,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 23:59:16,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 23:59:16,310 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 23:59:16,310 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 23:59:16,310 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 23:59:16,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 23:59:16,311 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 23:59:16,311 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 23:59:16,311 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 23:59:16,311 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 23:59:16,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 23:59:16,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 23:59:16,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 23:59:16,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 23:59:16,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 23:59:16,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 23:59:16,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 23:59:16,316 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 23:59:16,316 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 23:59:16,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 23:59:16,317 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_589b3651-d7de-42c4-af4c-4bff87b4130d/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 -> 3e23c3bca784f04992b2007c94519fee617936af [2019-11-19 23:59:16,452 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 23:59:16,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 23:59:16,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 23:59:16,467 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 23:59:16,468 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 23:59:16,469 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext/tree_stack.i [2019-11-19 23:59:16,528 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/data/4bf7c4382/075f36bf3eea40a0874adcd1ef52a9e1/FLAGf0de894ca [2019-11-19 23:59:16,923 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 23:59:16,924 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/sv-benchmarks/c/memsafety-ext/tree_stack.i [2019-11-19 23:59:16,935 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/data/4bf7c4382/075f36bf3eea40a0874adcd1ef52a9e1/FLAGf0de894ca [2019-11-19 23:59:17,257 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/data/4bf7c4382/075f36bf3eea40a0874adcd1ef52a9e1 [2019-11-19 23:59:17,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 23:59:17,260 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 23:59:17,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 23:59:17,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 23:59:17,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 23:59:17,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f218234 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17, skipping insertion in model container [2019-11-19 23:59:17,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,284 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 23:59:17,335 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 23:59:17,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:59:17,760 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 23:59:17,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 23:59:17,863 INFO L192 MainTranslator]: Completed translation [2019-11-19 23:59:17,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17 WrapperNode [2019-11-19 23:59:17,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 23:59:17,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 23:59:17,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 23:59:17,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 23:59:17,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,895 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... [2019-11-19 23:59:17,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 23:59:17,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 23:59:17,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 23:59:17,933 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 23:59:17,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:17,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 23:59:17,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 23:59:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-19 23:59:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-19 23:59:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-19 23:59:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-19 23:59:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-19 23:59:17,986 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 23:59:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-19 23:59:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-19 23:59:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-19 23:59:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-19 23:59:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-19 23:59:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-19 23:59:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-19 23:59:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-19 23:59:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-19 23:59:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-19 23:59:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-19 23:59:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-19 23:59:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-19 23:59:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-19 23:59:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-19 23:59:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-19 23:59:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-19 23:59:17,989 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-19 23:59:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-19 23:59:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-19 23:59:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-19 23:59:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-19 23:59:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-19 23:59:17,990 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-19 23:59:17,991 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-19 23:59:17,992 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-19 23:59:17,993 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 23:59:17,994 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-19 23:59:17,995 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-19 23:59:17,996 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-19 23:59:17,997 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-19 23:59:17,998 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-19 23:59:17,999 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-19 23:59:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-19 23:59:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-19 23:59:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-19 23:59:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-19 23:59:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-19 23:59:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-19 23:59:18,000 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-19 23:59:18,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 23:59:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 23:59:18,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 23:59:18,919 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 23:59:18,920 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-19 23:59:18,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:59:18 BoogieIcfgContainer [2019-11-19 23:59:18,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 23:59:18,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 23:59:18,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 23:59:18,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 23:59:18,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 11:59:17" (1/3) ... [2019-11-19 23:59:18,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a590837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:59:18, skipping insertion in model container [2019-11-19 23:59:18,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 11:59:17" (2/3) ... [2019-11-19 23:59:18,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a590837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 11:59:18, skipping insertion in model container [2019-11-19 23:59:18,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 11:59:18" (3/3) ... [2019-11-19 23:59:18,928 INFO L109 eAbstractionObserver]: Analyzing ICFG tree_stack.i [2019-11-19 23:59:18,937 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 23:59:18,943 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 67 error locations. [2019-11-19 23:59:18,952 INFO L249 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2019-11-19 23:59:18,967 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 23:59:18,967 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 23:59:18,967 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 23:59:18,968 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 23:59:18,968 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 23:59:18,968 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 23:59:18,968 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 23:59:18,968 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 23:59:18,987 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2019-11-19 23:59:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-19 23:59:18,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:18,997 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:18,997 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash 69581329, now seen corresponding path program 1 times [2019-11-19 23:59:19,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:19,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [168594975] [2019-11-19 23:59:19,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:19,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 23:59:19,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:19,289 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 [2019-11-19 23:59:19,290 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:19,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:19,297 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:19,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:59:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:19,306 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:19,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [168594975] [2019-11-19 23:59:19,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:19,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-19 23:59:19,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345718541] [2019-11-19 23:59:19,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 23:59:19,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 23:59:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:59:19,341 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 3 states. [2019-11-19 23:59:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:19,666 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-19 23:59:19,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:59:19,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-19 23:59:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:19,678 INFO L225 Difference]: With dead ends: 153 [2019-11-19 23:59:19,678 INFO L226 Difference]: Without dead ends: 149 [2019-11-19 23:59:19,679 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:59:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-19 23:59:19,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 131. [2019-11-19 23:59:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-19 23:59:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2019-11-19 23:59:19,743 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 7 [2019-11-19 23:59:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:19,743 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2019-11-19 23:59:19,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 23:59:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2019-11-19 23:59:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-19 23:59:19,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:19,744 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:19,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:19,947 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash 69581330, now seen corresponding path program 1 times [2019-11-19 23:59:19,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:19,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1235227949] [2019-11-19 23:59:19,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:20,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:59:20,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:20,154 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 [2019-11-19 23:59:20,154 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:20,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:20,161 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:20,161 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:59:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:20,170 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:20,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235227949] [2019-11-19 23:59:20,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:20,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 23:59:20,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693891954] [2019-11-19 23:59:20,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:59:20,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:20,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:59:20,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:59:20,202 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand 4 states. [2019-11-19 23:59:20,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:20,536 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2019-11-19 23:59:20,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:59:20,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-19 23:59:20,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:20,539 INFO L225 Difference]: With dead ends: 129 [2019-11-19 23:59:20,539 INFO L226 Difference]: Without dead ends: 129 [2019-11-19 23:59:20,539 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:59:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-19 23:59:20,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2019-11-19 23:59:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-19 23:59:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 137 transitions. [2019-11-19 23:59:20,550 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 137 transitions. Word has length 7 [2019-11-19 23:59:20,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:20,550 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 137 transitions. [2019-11-19 23:59:20,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:59:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 137 transitions. [2019-11-19 23:59:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:59:20,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:20,551 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:20,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:20,755 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:20,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1571849246, now seen corresponding path program 1 times [2019-11-19 23:59:20,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:20,756 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1335036180] [2019-11-19 23:59:20,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:20,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:59:20,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:20,935 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 [2019-11-19 23:59:20,935 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:20,937 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:20,938 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:20,938 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:59:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:20,948 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:20,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1335036180] [2019-11-19 23:59:20,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:20,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-19 23:59:20,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122949903] [2019-11-19 23:59:20,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:59:20,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:59:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:59:20,962 INFO L87 Difference]: Start difference. First operand 129 states and 137 transitions. Second operand 4 states. [2019-11-19 23:59:21,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:21,394 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2019-11-19 23:59:21,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:59:21,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-19 23:59:21,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:21,396 INFO L225 Difference]: With dead ends: 136 [2019-11-19 23:59:21,396 INFO L226 Difference]: Without dead ends: 136 [2019-11-19 23:59:21,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:59:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-19 23:59:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 115. [2019-11-19 23:59:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-19 23:59:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2019-11-19 23:59:21,404 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 10 [2019-11-19 23:59:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:21,405 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2019-11-19 23:59:21,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:59:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2019-11-19 23:59:21,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-19 23:59:21,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:21,406 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:21,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:21,613 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:21,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:21,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1571849245, now seen corresponding path program 1 times [2019-11-19 23:59:21,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:21,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [253316145] [2019-11-19 23:59:21,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:21,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:59:21,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:21,786 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 [2019-11-19 23:59:21,787 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:21,793 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:21,794 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:21,794 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:59:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:21,814 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:21,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [253316145] [2019-11-19 23:59:21,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:21,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-19 23:59:21,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862561503] [2019-11-19 23:59:21,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:59:21,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:21,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:59:21,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:59:21,910 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 6 states. [2019-11-19 23:59:22,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:22,728 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2019-11-19 23:59:22,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 23:59:22,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-19 23:59:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:22,731 INFO L225 Difference]: With dead ends: 168 [2019-11-19 23:59:22,731 INFO L226 Difference]: Without dead ends: 168 [2019-11-19 23:59:22,732 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:59:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-19 23:59:22,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2019-11-19 23:59:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-19 23:59:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2019-11-19 23:59:22,741 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 10 [2019-11-19 23:59:22,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:22,741 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2019-11-19 23:59:22,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:59:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2019-11-19 23:59:22,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 23:59:22,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:22,742 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:22,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:22,945 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:22,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1482685381, now seen corresponding path program 1 times [2019-11-19 23:59:22,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:22,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [37044105] [2019-11-19 23:59:22,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:23,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 23:59:23,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:23,135 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:23,135 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-19 23:59:23,137 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:23,157 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-19 23:59:23,158 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. [2019-11-19 23:59:23,158 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-19 23:59:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:23,166 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:23,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37044105] [2019-11-19 23:59:23,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:23,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 3 [2019-11-19 23:59:23,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714742987] [2019-11-19 23:59:23,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:59:23,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:59:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:59:23,174 INFO L87 Difference]: Start difference. First operand 134 states and 153 transitions. Second operand 4 states. [2019-11-19 23:59:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:23,417 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2019-11-19 23:59:23,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 23:59:23,418 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-19 23:59:23,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:23,419 INFO L225 Difference]: With dead ends: 138 [2019-11-19 23:59:23,419 INFO L226 Difference]: Without dead ends: 138 [2019-11-19 23:59:23,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:59:23,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-19 23:59:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-19 23:59:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-19 23:59:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 155 transitions. [2019-11-19 23:59:23,442 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 155 transitions. Word has length 11 [2019-11-19 23:59:23,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:23,442 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 155 transitions. [2019-11-19 23:59:23,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:59:23,443 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 155 transitions. [2019-11-19 23:59:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-19 23:59:23,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:23,443 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:23,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:23,644 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:23,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1482685380, now seen corresponding path program 1 times [2019-11-19 23:59:23,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:23,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2064688378] [2019-11-19 23:59:23,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:23,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:59:23,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:23,798 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 [2019-11-19 23:59:23,798 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:23,804 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:23,804 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:23,804 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:59:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:23,811 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:23,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064688378] [2019-11-19 23:59:23,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:23,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 23:59:23,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848970992] [2019-11-19 23:59:23,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 23:59:23,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 23:59:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:59:23,834 INFO L87 Difference]: Start difference. First operand 134 states and 155 transitions. Second operand 4 states. [2019-11-19 23:59:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:24,188 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2019-11-19 23:59:24,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 23:59:24,189 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-19 23:59:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:24,190 INFO L225 Difference]: With dead ends: 136 [2019-11-19 23:59:24,190 INFO L226 Difference]: Without dead ends: 136 [2019-11-19 23:59:24,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 23:59:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-19 23:59:24,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2019-11-19 23:59:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-19 23:59:24,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2019-11-19 23:59:24,196 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 11 [2019-11-19 23:59:24,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:24,196 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2019-11-19 23:59:24,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 23:59:24,197 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2019-11-19 23:59:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 23:59:24,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:24,197 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:24,400 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:24,400 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash 325667045, now seen corresponding path program 1 times [2019-11-19 23:59:24,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:24,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1826697098] [2019-11-19 23:59:24,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:24,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 23:59:24,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:24,525 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:24,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826697098] [2019-11-19 23:59:24,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:24,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-19 23:59:24,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368768923] [2019-11-19 23:59:24,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 23:59:24,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 23:59:24,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:59:24,538 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand 3 states. [2019-11-19 23:59:24,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:24,575 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2019-11-19 23:59:24,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:59:24,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-19 23:59:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:24,577 INFO L225 Difference]: With dead ends: 133 [2019-11-19 23:59:24,577 INFO L226 Difference]: Without dead ends: 133 [2019-11-19 23:59:24,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:59:24,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-19 23:59:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-11-19 23:59:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-19 23:59:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2019-11-19 23:59:24,582 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 15 [2019-11-19 23:59:24,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:24,582 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2019-11-19 23:59:24,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 23:59:24,582 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2019-11-19 23:59:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:59:24,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:24,583 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:24,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:24,786 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1505743044, now seen corresponding path program 1 times [2019-11-19 23:59:24,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:24,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1931960948] [2019-11-19 23:59:24,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:24,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:59:24,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:24,981 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:24,982 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-19 23:59:24,982 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:25,002 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-19 23:59:25,003 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. [2019-11-19 23:59:25,003 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-19 23:59:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:25,021 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:25,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931960948] [2019-11-19 23:59:25,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:25,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 4 [2019-11-19 23:59:25,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955474008] [2019-11-19 23:59:25,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-19 23:59:25,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:25,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-19 23:59:25,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-19 23:59:25,054 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand 5 states. [2019-11-19 23:59:25,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:25,408 INFO L93 Difference]: Finished difference Result 145 states and 165 transitions. [2019-11-19 23:59:25,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:59:25,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-19 23:59:25,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:25,409 INFO L225 Difference]: With dead ends: 145 [2019-11-19 23:59:25,409 INFO L226 Difference]: Without dead ends: 145 [2019-11-19 23:59:25,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:59:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-19 23:59:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2019-11-19 23:59:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-19 23:59:25,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2019-11-19 23:59:25,413 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 16 [2019-11-19 23:59:25,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:25,413 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2019-11-19 23:59:25,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-19 23:59:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2019-11-19 23:59:25,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 23:59:25,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:25,414 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:25,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:25,614 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1505743045, now seen corresponding path program 1 times [2019-11-19 23:59:25,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:25,615 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1906441240] [2019-11-19 23:59:25,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:25,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:59:25,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:25,788 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 [2019-11-19 23:59:25,788 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:25,793 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:25,793 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:25,793 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:59:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:25,807 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:25,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1906441240] [2019-11-19 23:59:25,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:25,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-19 23:59:25,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793410703] [2019-11-19 23:59:25,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:59:25,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:25,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:59:25,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:59:25,869 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand 6 states. [2019-11-19 23:59:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:26,479 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2019-11-19 23:59:26,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:59:26,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-19 23:59:26,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:26,480 INFO L225 Difference]: With dead ends: 168 [2019-11-19 23:59:26,481 INFO L226 Difference]: Without dead ends: 168 [2019-11-19 23:59:26,481 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:59:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-11-19 23:59:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2019-11-19 23:59:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-19 23:59:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 162 transitions. [2019-11-19 23:59:26,485 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 162 transitions. Word has length 16 [2019-11-19 23:59:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:26,485 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 162 transitions. [2019-11-19 23:59:26,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:59:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 162 transitions. [2019-11-19 23:59:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 23:59:26,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:26,486 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:26,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:26,687 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:26,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:26,687 INFO L82 PathProgramCache]: Analyzing trace with hash 587914317, now seen corresponding path program 1 times [2019-11-19 23:59:26,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:26,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2042988222] [2019-11-19 23:59:26,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:26,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-19 23:59:26,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:26,811 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:26,823 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042988222] [2019-11-19 23:59:26,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:26,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-19 23:59:26,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405452536] [2019-11-19 23:59:26,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-19 23:59:26,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:26,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-19 23:59:26,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-19 23:59:26,823 INFO L87 Difference]: Start difference. First operand 136 states and 162 transitions. Second operand 3 states. [2019-11-19 23:59:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:26,830 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2019-11-19 23:59:26,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 23:59:26,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-19 23:59:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:26,831 INFO L225 Difference]: With dead ends: 138 [2019-11-19 23:59:26,831 INFO L226 Difference]: Without dead ends: 138 [2019-11-19 23:59:26,831 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 [2019-11-19 23:59:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-19 23:59:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2019-11-19 23:59:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-19 23:59:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 164 transitions. [2019-11-19 23:59:26,835 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 164 transitions. Word has length 17 [2019-11-19 23:59:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:26,835 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 164 transitions. [2019-11-19 23:59:26,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-19 23:59:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 164 transitions. [2019-11-19 23:59:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:59:26,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:26,836 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:27,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:27,040 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:27,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1002652963, now seen corresponding path program 1 times [2019-11-19 23:59:27,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:27,041 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1693141866] [2019-11-19 23:59:27,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:27,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:59:27,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:27,224 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:27,224 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-19 23:59:27,225 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:27,240 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-19 23:59:27,241 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. [2019-11-19 23:59:27,241 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-19 23:59:27,265 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 11 treesize of output 7 [2019-11-19 23:59:27,266 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:27,272 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:27,273 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:27,273 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:9 [2019-11-19 23:59:27,291 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 17 treesize of output 9 [2019-11-19 23:59:27,291 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:27,297 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:27,297 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:27,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2019-11-19 23:59:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:27,305 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:27,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1693141866] [2019-11-19 23:59:27,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:27,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2019-11-19 23:59:27,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869186689] [2019-11-19 23:59:27,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:59:27,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:59:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:59:27,314 INFO L87 Difference]: Start difference. First operand 138 states and 164 transitions. Second operand 6 states. [2019-11-19 23:59:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:27,848 INFO L93 Difference]: Finished difference Result 203 states and 241 transitions. [2019-11-19 23:59:27,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:59:27,849 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-19 23:59:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:27,850 INFO L225 Difference]: With dead ends: 203 [2019-11-19 23:59:27,850 INFO L226 Difference]: Without dead ends: 203 [2019-11-19 23:59:27,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:59:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-19 23:59:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2019-11-19 23:59:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-19 23:59:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2019-11-19 23:59:27,855 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 18 [2019-11-19 23:59:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:27,855 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2019-11-19 23:59:27,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:59:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2019-11-19 23:59:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 23:59:27,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:27,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:28,060 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:28,062 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1002652964, now seen corresponding path program 1 times [2019-11-19 23:59:28,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:28,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2018618635] [2019-11-19 23:59:28,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:28,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:59:28,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:28,252 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 [2019-11-19 23:59:28,253 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,260 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:28,261 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,261 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:59:28,288 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 11 treesize of output 7 [2019-11-19 23:59:28,288 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:28,300 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 11 treesize of output 7 [2019-11-19 23:59:28,300 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,308 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:28,309 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,309 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:28, output treesize:17 [2019-11-19 23:59:28,324 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 17 treesize of output 9 [2019-11-19 23:59:28,324 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,331 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:28,334 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 15 treesize of output 7 [2019-11-19 23:59:28,334 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,338 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:28,339 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:28,339 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:31, output treesize:9 [2019-11-19 23:59:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:28,348 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:28,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018618635] [2019-11-19 23:59:28,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:28,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-19 23:59:28,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194088633] [2019-11-19 23:59:28,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:59:28,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:59:28,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:59:28,463 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 8 states. [2019-11-19 23:59:29,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:29,787 INFO L93 Difference]: Finished difference Result 247 states and 293 transitions. [2019-11-19 23:59:29,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:59:29,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-19 23:59:29,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:29,789 INFO L225 Difference]: With dead ends: 247 [2019-11-19 23:59:29,789 INFO L226 Difference]: Without dead ends: 247 [2019-11-19 23:59:29,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:59:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-11-19 23:59:29,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 136. [2019-11-19 23:59:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-19 23:59:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2019-11-19 23:59:29,794 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 18 [2019-11-19 23:59:29,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:29,794 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2019-11-19 23:59:29,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:59:29,794 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2019-11-19 23:59:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:59:29,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:29,795 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:29,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:29,998 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:29,999 INFO L82 PathProgramCache]: Analyzing trace with hash 952695660, now seen corresponding path program 1 times [2019-11-19 23:59:29,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:29,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1773204167] [2019-11-19 23:59:29,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:30,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:59:30,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:30,196 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:30,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1773204167] [2019-11-19 23:59:30,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:30,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 6 [2019-11-19 23:59:30,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518144133] [2019-11-19 23:59:30,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 23:59:30,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:30,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 23:59:30,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-19 23:59:30,223 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand 7 states. [2019-11-19 23:59:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:30,436 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2019-11-19 23:59:30,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:59:30,437 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-19 23:59:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:30,438 INFO L225 Difference]: With dead ends: 147 [2019-11-19 23:59:30,438 INFO L226 Difference]: Without dead ends: 147 [2019-11-19 23:59:30,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:59:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-19 23:59:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2019-11-19 23:59:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-19 23:59:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2019-11-19 23:59:30,441 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 19 [2019-11-19 23:59:30,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:30,441 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2019-11-19 23:59:30,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 23:59:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2019-11-19 23:59:30,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 23:59:30,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:30,443 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 23:59:30,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:30,645 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:30,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1013302512, now seen corresponding path program 1 times [2019-11-19 23:59:30,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:30,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1673037432] [2019-11-19 23:59:30,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:30,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-19 23:59:30,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:30,813 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 13 treesize of output 9 [2019-11-19 23:59:30,813 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:30,825 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:30,828 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 13 treesize of output 9 [2019-11-19 23:59:30,829 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:30,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:30,836 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:30,836 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-19 23:59:30,883 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 15 treesize of output 7 [2019-11-19 23:59:30,883 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:30,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:30,894 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 15 treesize of output 7 [2019-11-19 23:59:30,894 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:30,901 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:30,901 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:30,901 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-19 23:59:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:30,926 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:30,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-19 23:59:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:31,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1673037432] [2019-11-19 23:59:31,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:31,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2019-11-19 23:59:31,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441836010] [2019-11-19 23:59:31,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 23:59:31,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:31,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 23:59:31,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:59:31,011 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand 9 states. [2019-11-19 23:59:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:31,616 INFO L93 Difference]: Finished difference Result 164 states and 193 transitions. [2019-11-19 23:59:31,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-19 23:59:31,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-19 23:59:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:31,617 INFO L225 Difference]: With dead ends: 164 [2019-11-19 23:59:31,617 INFO L226 Difference]: Without dead ends: 164 [2019-11-19 23:59:31,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-19 23:59:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-11-19 23:59:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2019-11-19 23:59:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-19 23:59:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2019-11-19 23:59:31,622 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 19 [2019-11-19 23:59:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:31,622 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2019-11-19 23:59:31,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 23:59:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2019-11-19 23:59:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-19 23:59:31,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:31,623 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] [2019-11-19 23:59:31,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:31,826 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:31,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:31,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2039924261, now seen corresponding path program 1 times [2019-11-19 23:59:31,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:31,827 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1873892857] [2019-11-19 23:59:31,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:31,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 23:59:31,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:32,014 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:32,014 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-19 23:59:32,015 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,029 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-19 23:59:32,030 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. [2019-11-19 23:59:32,030 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-19 23:59:32,041 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 13 treesize of output 9 [2019-11-19 23:59:32,041 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,047 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:32,048 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,048 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:11 [2019-11-19 23:59:32,065 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 21 treesize of output 9 [2019-11-19 23:59:32,065 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,069 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:32,069 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,069 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:7 [2019-11-19 23:59:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:32,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:32,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1873892857] [2019-11-19 23:59:32,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:32,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 5 [2019-11-19 23:59:32,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850633956] [2019-11-19 23:59:32,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 23:59:32,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 23:59:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-19 23:59:32,088 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand 6 states. [2019-11-19 23:59:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:32,555 INFO L93 Difference]: Finished difference Result 167 states and 194 transitions. [2019-11-19 23:59:32,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 23:59:32,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-19 23:59:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:32,557 INFO L225 Difference]: With dead ends: 167 [2019-11-19 23:59:32,557 INFO L226 Difference]: Without dead ends: 167 [2019-11-19 23:59:32,558 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-19 23:59:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-19 23:59:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 154. [2019-11-19 23:59:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-11-19 23:59:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2019-11-19 23:59:32,562 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 20 [2019-11-19 23:59:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:32,562 INFO L462 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2019-11-19 23:59:32,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 23:59:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2019-11-19 23:59:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-19 23:59:32,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:32,563 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] [2019-11-19 23:59:32,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:32,766 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2039924262, now seen corresponding path program 1 times [2019-11-19 23:59:32,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:32,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1301298629] [2019-11-19 23:59:32,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:32,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 23:59:32,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:32,921 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 [2019-11-19 23:59:32,921 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,925 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:32,925 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,925 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-19 23:59:32,939 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 13 treesize of output 9 [2019-11-19 23:59:32,940 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,949 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:32,953 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 13 treesize of output 9 [2019-11-19 23:59:32,954 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,962 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:32,962 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,963 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:21 [2019-11-19 23:59:32,988 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 21 treesize of output 9 [2019-11-19 23:59:32,989 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:32,997 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:32,999 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 19 treesize of output 7 [2019-11-19 23:59:32,999 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:33,003 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:33,003 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:33,004 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2019-11-19 23:59:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:33,013 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:33,146 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1301298629] [2019-11-19 23:59:33,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:33,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-19 23:59:33,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264948862] [2019-11-19 23:59:33,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-19 23:59:33,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:33,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-19 23:59:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-19 23:59:33,148 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand 8 states. [2019-11-19 23:59:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 23:59:34,503 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2019-11-19 23:59:34,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 23:59:34,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-19 23:59:34,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 23:59:34,505 INFO L225 Difference]: With dead ends: 213 [2019-11-19 23:59:34,505 INFO L226 Difference]: Without dead ends: 213 [2019-11-19 23:59:34,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-11-19 23:59:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-19 23:59:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 153. [2019-11-19 23:59:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-19 23:59:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 181 transitions. [2019-11-19 23:59:34,510 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 181 transitions. Word has length 20 [2019-11-19 23:59:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 23:59:34,510 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 181 transitions. [2019-11-19 23:59:34,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-19 23:59:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 181 transitions. [2019-11-19 23:59:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-19 23:59:34,511 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 23:59:34,511 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] [2019-11-19 23:59:34,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 23:59:34,714 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-19 23:59:34,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 23:59:34,714 INFO L82 PathProgramCache]: Analyzing trace with hash 712500911, now seen corresponding path program 1 times [2019-11-19 23:59:34,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 23:59:34,715 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1970353370] [2019-11-19 23:59:34,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 [2019-11-19 23:59:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 23:59:34,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-19 23:59:34,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 23:59:34,878 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 [2019-11-19 23:59:34,878 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:34,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:34,880 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:34,880 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-19 23:59:34,901 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:34,901 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 19 treesize of output 41 [2019-11-19 23:59:34,902 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:34,920 INFO L567 ElimStorePlain]: treesize reduction 14, result has 56.3 percent of original size [2019-11-19 23:59:34,920 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:34,920 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-19 23:59:34,941 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-19 23:59:34,942 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:34,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:34,956 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:34,956 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:34 [2019-11-19 23:59:35,000 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 25 treesize of output 13 [2019-11-19 23:59:35,001 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:35,006 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 23:59:35,006 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 23:59:35,006 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:15 [2019-11-19 23:59:35,060 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2019-11-19 23:59:35,061 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 23:59:35,080 INFO L567 ElimStorePlain]: treesize reduction 4, result has 73.3 percent of original size [2019-11-19 23:59:35,080 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. [2019-11-19 23:59:35,080 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:11 [2019-11-19 23:59:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:35,101 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 23:59:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 23:59:35,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970353370] [2019-11-19 23:59:35,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 23:59:35,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2019-11-19 23:59:35,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788416122] [2019-11-19 23:59:35,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-19 23:59:35,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 23:59:35,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-19 23:59:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2019-11-19 23:59:35,259 INFO L87 Difference]: Start difference. First operand 153 states and 181 transitions. Second operand 15 states. [2019-11-20 00:00:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:00:06,637 INFO L93 Difference]: Finished difference Result 173 states and 201 transitions. [2019-11-20 00:00:06,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:00:06,638 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2019-11-20 00:00:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:00:06,639 INFO L225 Difference]: With dead ends: 173 [2019-11-20 00:00:06,639 INFO L226 Difference]: Without dead ends: 173 [2019-11-20 00:00:06,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2019-11-20 00:00:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-20 00:00:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 158. [2019-11-20 00:00:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-20 00:00:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 187 transitions. [2019-11-20 00:00:06,643 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 187 transitions. Word has length 21 [2019-11-20 00:00:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:00:06,644 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 187 transitions. [2019-11-20 00:00:06,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 00:00:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 187 transitions. [2019-11-20 00:00:06,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 00:00:06,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:00:06,645 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] [2019-11-20 00:00:06,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:06,845 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 00:00:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:00:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 712500912, now seen corresponding path program 1 times [2019-11-20 00:00:06,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:00:06,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [805593569] [2019-11-20 00:00:06,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 00:00:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:00:07,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 00:00:07,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:00:07,028 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 00:00:07,028 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,037 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,039 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 00:00:07,040 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,046 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,047 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,047 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 00:00:07,066 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 00:00:07,067 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2019-11-20 00:00:07,067 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,093 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,103 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,103 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 13 treesize of output 17 [2019-11-20 00:00:07,104 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,125 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,125 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,125 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:21 [2019-11-20 00:00:07,152 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 00:00:07,152 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,168 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,171 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 00:00:07,171 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,184 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,185 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,185 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:39 [2019-11-20 00:00:07,245 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 25 treesize of output 13 [2019-11-20 00:00:07,245 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,263 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,271 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-20 00:00:07,272 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:07,286 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:07,287 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 00:00:07,287 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2019-11-20 00:00:07,376 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 00:00:07,376 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:00:07,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:00:08,195 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 00:00:08,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [805593569] [2019-11-20 00:00:08,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:00:08,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 00:00:08,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689343730] [2019-11-20 00:00:08,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 00:00:08,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:00:08,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 00:00:08,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:00:08,197 INFO L87 Difference]: Start difference. First operand 158 states and 187 transitions. Second operand 14 states. [2019-11-20 00:00:09,289 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2019-11-20 00:00:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:00:11,442 INFO L93 Difference]: Finished difference Result 253 states and 290 transitions. [2019-11-20 00:00:11,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 00:00:11,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-11-20 00:00:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:00:11,445 INFO L225 Difference]: With dead ends: 253 [2019-11-20 00:00:11,445 INFO L226 Difference]: Without dead ends: 253 [2019-11-20 00:00:11,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2019-11-20 00:00:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-11-20 00:00:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 173. [2019-11-20 00:00:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-20 00:00:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2019-11-20 00:00:11,450 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 21 [2019-11-20 00:00:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:00:11,450 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2019-11-20 00:00:11,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 00:00:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2019-11-20 00:00:11,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 00:00:11,451 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:00:11,451 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] [2019-11-20 00:00:11,651 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:11,652 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 00:00:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:00:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1463074255, now seen corresponding path program 1 times [2019-11-20 00:00:11,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:00:11,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2113372413] [2019-11-20 00:00:11,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 00:00:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:00:11,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 00:00:11,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:00:11,842 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 00:00:11,842 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:11,844 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:11,844 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:11,844 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:00:11,887 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:11,887 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 00:00:11,888 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:11,902 INFO L567 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-11-20 00:00:11,903 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:11,903 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2019-11-20 00:00:11,916 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 00:00:11,916 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:11,924 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:11,925 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:11,925 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:25 [2019-11-20 00:00:11,979 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:11,979 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 51 [2019-11-20 00:00:11,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:00:11,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:11,981 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-11-20 00:00:12,012 INFO L567 ElimStorePlain]: treesize reduction 70, result has 34.6 percent of original size [2019-11-20 00:00:12,012 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 00:00:12,012 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:36 [2019-11-20 00:00:12,052 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:12,053 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 31 [2019-11-20 00:00:12,053 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:12,066 INFO L567 ElimStorePlain]: treesize reduction 12, result has 61.3 percent of original size [2019-11-20 00:00:12,067 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 00:00:12,067 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2019-11-20 00:00:12,084 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 00:00:12,084 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:00:12,181 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:12,197 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:12,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:00:12,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:12,198 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 00:00:12,199 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:44 [2019-11-20 00:00:12,274 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 00:00:12,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113372413] [2019-11-20 00:00:12,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:00:12,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-20 00:00:12,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610582829] [2019-11-20 00:00:12,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:00:12,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:00:12,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:00:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:00:12,276 INFO L87 Difference]: Start difference. First operand 173 states and 204 transitions. Second operand 16 states. [2019-11-20 00:00:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:00:13,506 INFO L93 Difference]: Finished difference Result 208 states and 243 transitions. [2019-11-20 00:00:13,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:00:13,506 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-11-20 00:00:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:00:13,507 INFO L225 Difference]: With dead ends: 208 [2019-11-20 00:00:13,507 INFO L226 Difference]: Without dead ends: 208 [2019-11-20 00:00:13,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:00:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-20 00:00:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 172. [2019-11-20 00:00:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-20 00:00:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 201 transitions. [2019-11-20 00:00:13,512 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 201 transitions. Word has length 21 [2019-11-20 00:00:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:00:13,512 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 201 transitions. [2019-11-20 00:00:13,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:00:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 201 transitions. [2019-11-20 00:00:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 00:00:13,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:00:13,513 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] [2019-11-20 00:00:13,713 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:13,714 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 00:00:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:00:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1463074254, now seen corresponding path program 1 times [2019-11-20 00:00:13,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:00:13,714 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [847748772] [2019-11-20 00:00:13,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/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 00:00:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:00:13,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 00:00:13,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:00:13,913 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 00:00:13,914 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,915 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:13,915 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,916 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:00:13,923 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_100|], 1=[|v_#valid_177|]} [2019-11-20 00:00:13,926 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 00:00:13,926 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,935 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:13,941 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:13,941 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 15 [2019-11-20 00:00:13,941 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,947 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:13,947 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,947 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-11-20 00:00:13,963 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 00:00:13,963 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,974 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:13,977 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 00:00:13,977 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,986 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:13,986 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:13,986 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:25 [2019-11-20 00:00:14,040 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:14,041 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 62 [2019-11-20 00:00:14,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:14,042 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:14,071 INFO L567 ElimStorePlain]: treesize reduction 20, result has 73.3 percent of original size [2019-11-20 00:00:14,074 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2019-11-20 00:00:14,075 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:14,086 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:14,086 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 00:00:14,086 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:47 [2019-11-20 00:00:14,124 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:14,125 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2019-11-20 00:00:14,125 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:14,148 INFO L567 ElimStorePlain]: treesize reduction 12, result has 72.1 percent of original size [2019-11-20 00:00:14,151 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2019-11-20 00:00:14,151 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:14,157 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:14,157 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:14,157 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:61, output treesize:9 [2019-11-20 00:00:14,172 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 00:00:14,172 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:00:15,155 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:15,465 WARN L191 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-11-20 00:00:15,465 INFO L567 ElimStorePlain]: treesize reduction 10, result has 93.3 percent of original size [2019-11-20 00:00:15,472 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:15,636 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-11-20 00:00:15,636 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:15,644 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:15,870 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2019-11-20 00:00:15,870 INFO L567 ElimStorePlain]: treesize reduction 48, result has 69.0 percent of original size [2019-11-20 00:00:15,875 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:16,018 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2019-11-20 00:00:16,018 INFO L567 ElimStorePlain]: treesize reduction 10, result has 85.5 percent of original size [2019-11-20 00:00:16,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:16,019 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-2 vars, End of recursive call: and 4 xjuncts. [2019-11-20 00:00:16,019 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:160, output treesize:34 [2019-11-20 00:00:16,116 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 14 treesize of output 12 [2019-11-20 00:00:16,117 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:16,121 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:16,121 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:16,121 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:10 [2019-11-20 00:00:16,168 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 00:00:16,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [847748772] [2019-11-20 00:00:16,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:00:16,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-20 00:00:16,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191656988] [2019-11-20 00:00:16,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:00:16,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:00:16,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:00:16,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:00:16,169 INFO L87 Difference]: Start difference. First operand 172 states and 201 transitions. Second operand 16 states. [2019-11-20 00:00:18,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:00:18,441 INFO L93 Difference]: Finished difference Result 207 states and 240 transitions. [2019-11-20 00:00:18,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:00:18,443 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2019-11-20 00:00:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:00:18,444 INFO L225 Difference]: With dead ends: 207 [2019-11-20 00:00:18,445 INFO L226 Difference]: Without dead ends: 207 [2019-11-20 00:00:18,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:00:18,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-20 00:00:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 171. [2019-11-20 00:00:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-20 00:00:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2019-11-20 00:00:18,451 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 21 [2019-11-20 00:00:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:00:18,452 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2019-11-20 00:00:18,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:00:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2019-11-20 00:00:18,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 00:00:18,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:00:18,453 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 00:00:18,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:18,664 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 00:00:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:00:18,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1891462857, now seen corresponding path program 1 times [2019-11-20 00:00:18,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:00:18,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [494067636] [2019-11-20 00:00:18,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:00:18,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 00:00:18,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:00:18,892 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 00:00:18,893 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:18,895 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:18,895 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:18,895 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:00:18,924 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:18,924 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 00:00:18,925 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:18,944 INFO L567 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-11-20 00:00:18,944 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:18,945 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2019-11-20 00:00:18,961 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 00:00:18,961 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:18,975 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:18,976 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:18,976 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:29 [2019-11-20 00:00:19,060 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:19,060 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 59 [2019-11-20 00:00:19,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:19,061 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:19,091 INFO L567 ElimStorePlain]: treesize reduction 26, result has 61.8 percent of original size [2019-11-20 00:00:19,092 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 00:00:19,092 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:42 [2019-11-20 00:00:19,169 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:19,169 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 33 [2019-11-20 00:00:19,170 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:19,186 INFO L567 ElimStorePlain]: treesize reduction 14, result has 57.6 percent of original size [2019-11-20 00:00:19,187 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 00:00:19,187 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:19 [2019-11-20 00:00:19,209 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 00:00:19,209 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:00:19,349 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:19,380 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:19,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:00:19,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:19,381 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 00:00:19,381 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:44 [2019-11-20 00:00:19,518 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 00:00:19,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [494067636] [2019-11-20 00:00:19,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:00:19,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-20 00:00:19,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736909446] [2019-11-20 00:00:19,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:00:19,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:00:19,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:00:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:00:19,520 INFO L87 Difference]: Start difference. First operand 171 states and 198 transitions. Second operand 16 states. [2019-11-20 00:00:21,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:00:21,054 INFO L93 Difference]: Finished difference Result 181 states and 210 transitions. [2019-11-20 00:00:21,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:00:21,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-11-20 00:00:21,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:00:21,056 INFO L225 Difference]: With dead ends: 181 [2019-11-20 00:00:21,056 INFO L226 Difference]: Without dead ends: 181 [2019-11-20 00:00:21,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:00:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-20 00:00:21,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2019-11-20 00:00:21,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-20 00:00:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 197 transitions. [2019-11-20 00:00:21,061 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 197 transitions. Word has length 23 [2019-11-20 00:00:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:00:21,062 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 197 transitions. [2019-11-20 00:00:21,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:00:21,062 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 197 transitions. [2019-11-20 00:00:21,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 00:00:21,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:00:21,063 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 00:00:21,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:21,266 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 00:00:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:00:21,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1891462858, now seen corresponding path program 1 times [2019-11-20 00:00:21,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:00:21,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [988562019] [2019-11-20 00:00:21,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:00:21,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 00:00:21,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:00:21,529 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 00:00:21,529 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,531 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,531 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,532 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:00:21,542 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_104|], 1=[|v_#valid_190|]} [2019-11-20 00:00:21,545 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 00:00:21,545 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,555 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,564 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,565 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 15 [2019-11-20 00:00:21,565 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,577 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,577 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,578 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-11-20 00:00:21,613 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 00:00:21,614 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,631 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,637 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 00:00:21,637 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,651 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,651 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,652 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:31 [2019-11-20 00:00:21,747 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,747 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 70 [2019-11-20 00:00:21,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:00:21,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:21,749 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-11-20 00:00:21,819 INFO L567 ElimStorePlain]: treesize reduction 132, result has 34.0 percent of original size [2019-11-20 00:00:21,824 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2019-11-20 00:00:21,825 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,842 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,843 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 00:00:21,843 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:77, output treesize:57 [2019-11-20 00:00:21,904 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,905 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 40 [2019-11-20 00:00:21,906 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,977 INFO L567 ElimStorePlain]: treesize reduction 14, result has 72.5 percent of original size [2019-11-20 00:00:21,982 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2019-11-20 00:00:21,982 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,993 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:21,994 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:21,994 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:75, output treesize:11 [2019-11-20 00:00:22,033 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 00:00:22,033 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:00:23,995 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:24,185 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2019-11-20 00:00:24,186 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:24,200 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:24,605 WARN L191 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2019-11-20 00:00:24,606 INFO L567 ElimStorePlain]: treesize reduction 12, result has 93.0 percent of original size [2019-11-20 00:00:24,616 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:24,945 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2019-11-20 00:00:24,945 INFO L567 ElimStorePlain]: treesize reduction 56, result has 61.9 percent of original size [2019-11-20 00:00:24,954 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:25,191 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2019-11-20 00:00:25,192 INFO L567 ElimStorePlain]: treesize reduction 12, result has 84.8 percent of original size [2019-11-20 00:00:25,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:00:25,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:00:25,193 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 4 dim-2 vars, End of recursive call: and 5 xjuncts. [2019-11-20 00:00:25,193 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:190, output treesize:54 [2019-11-20 00:00:25,396 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2019-11-20 00:00:25,402 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 14 treesize of output 12 [2019-11-20 00:00:25,404 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:25,409 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:25,409 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:25,409 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:10 [2019-11-20 00:00:25,479 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 00:00:25,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988562019] [2019-11-20 00:00:25,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:00:25,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-20 00:00:25,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799312737] [2019-11-20 00:00:25,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:00:25,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:00:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:00:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:00:25,481 INFO L87 Difference]: Start difference. First operand 170 states and 197 transitions. Second operand 16 states. [2019-11-20 00:00:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:00:28,094 INFO L93 Difference]: Finished difference Result 180 states and 209 transitions. [2019-11-20 00:00:28,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 00:00:28,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-11-20 00:00:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:00:28,099 INFO L225 Difference]: With dead ends: 180 [2019-11-20 00:00:28,099 INFO L226 Difference]: Without dead ends: 180 [2019-11-20 00:00:28,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650 [2019-11-20 00:00:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-20 00:00:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 169. [2019-11-20 00:00:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-11-20 00:00:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2019-11-20 00:00:28,104 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 23 [2019-11-20 00:00:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:00:28,104 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2019-11-20 00:00:28,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:00:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2019-11-20 00:00:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 00:00:28,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:00:28,106 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:00:28,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:28,309 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 00:00:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:00:28,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1961197578, now seen corresponding path program 1 times [2019-11-20 00:00:28,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:00:28,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1319379319] [2019-11-20 00:00:28,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:00:28,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 00:00:28,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:00:28,609 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 13 treesize of output 9 [2019-11-20 00:00:28,610 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:28,620 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:28,620 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:28,621 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2019-11-20 00:00:28,657 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 15 treesize of output 7 [2019-11-20 00:00:28,657 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:28,662 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:28,663 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:28,663 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-11-20 00:00:28,697 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 00:00:28,698 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:00:28,778 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 00:00:28,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1319379319] [2019-11-20 00:00:28,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:00:28,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 13 [2019-11-20 00:00:28,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624094661] [2019-11-20 00:00:28,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 00:00:28,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:00:28,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 00:00:28,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:00:28,779 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand 14 states. [2019-11-20 00:00:29,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:00:29,714 INFO L93 Difference]: Finished difference Result 184 states and 213 transitions. [2019-11-20 00:00:29,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 00:00:29,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2019-11-20 00:00:29,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:00:29,715 INFO L225 Difference]: With dead ends: 184 [2019-11-20 00:00:29,715 INFO L226 Difference]: Without dead ends: 184 [2019-11-20 00:00:29,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2019-11-20 00:00:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-20 00:00:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 171. [2019-11-20 00:00:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-11-20 00:00:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 198 transitions. [2019-11-20 00:00:29,720 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 198 transitions. Word has length 26 [2019-11-20 00:00:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:00:29,720 INFO L462 AbstractCegarLoop]: Abstraction has 171 states and 198 transitions. [2019-11-20 00:00:29,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 00:00:29,720 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 198 transitions. [2019-11-20 00:00:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 00:00:29,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:00:29,721 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:00:29,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:29,924 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr51REQUIRES_VIOLATION, mainErr66ENSURES_VIOLATIONMEMORY_LEAK, mainErr9REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr49REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr47REQUIRES_VIOLATION, mainErr43REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr46ASSERT_VIOLATIONMEMORY_FREE, mainErr22REQUIRES_VIOLATION, mainErr65ASSERT_VIOLATIONMEMORY_FREE, mainErr19REQUIRES_VIOLATION, mainErr40REQUIRES_VIOLATION, mainErr61REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr38REQUIRES_VIOLATION, mainErr59REQUIRES_VIOLATION, mainErr57REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr34REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr36REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr53REQUIRES_VIOLATION, mainErr55REQUIRES_VIOLATION, mainErr64ASSERT_VIOLATIONMEMORY_FREE, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr50REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr52REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr48REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr42REQUIRES_VIOLATION, mainErr63ASSERT_VIOLATIONMEMORY_FREE, mainErr44ASSERT_VIOLATIONMEMORY_FREE, mainErr23REQUIRES_VIOLATION, mainErr62REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr41REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr37REQUIRES_VIOLATION, mainErr60REQUIRES_VIOLATION, mainErr39REQUIRES_VIOLATION, mainErr58REQUIRES_VIOLATION, mainErr35REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr56REQUIRES_VIOLATION, mainErr45ASSERT_VIOLATIONMEMORY_FREE, mainErr10REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr33REQUIRES_VIOLATION, mainErr54REQUIRES_VIOLATION]=== [2019-11-20 00:00:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:00:29,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1597137303, now seen corresponding path program 1 times [2019-11-20 00:00:29,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:00:29,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [272247184] [2019-11-20 00:00:29,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_589b3651-d7de-42c4-af4c-4bff87b4130d/bin/uautomizer/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:00:30,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 00:00:30,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:00:30,182 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 11 treesize of output 7 [2019-11-20 00:00:30,182 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,196 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:30,199 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 11 treesize of output 7 [2019-11-20 00:00:30,199 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,211 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:30,211 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,211 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-20 00:00:30,233 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 00:00:30,234 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-11-20 00:00:30,235 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,270 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:30,274 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 00:00:30,275 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2019-11-20 00:00:30,275 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,295 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:30,296 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,296 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:44, output treesize:18 [2019-11-20 00:00:30,301 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 15 treesize of output 7 [2019-11-20 00:00:30,301 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,309 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:30,309 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 00:00:30,309 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2019-11-20 00:00:30,358 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:30,359 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 24 treesize of output 24 [2019-11-20 00:00:30,359 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,370 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:00:30,370 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:00:30,370 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:27, output treesize:7 [2019-11-20 00:00:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:00:30,382 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:00:30,800 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 00:00:33,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:00:33,074 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: incompatible size at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.computeCostEstimation(ArrayIndexBasedCostEstimation.java:152) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.(ArrayIndexBasedCostEstimation.java:64) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:519) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:390) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 00:00:33,077 INFO L168 Benchmark]: Toolchain (without parser) took 75816.54 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 262.1 MB). Free memory was 939.3 MB in the beginning and 1.2 GB in the end (delta: -222.0 MB). Peak memory consumption was 40.2 MB. Max. memory is 11.5 GB. [2019-11-20 00:00:33,077 INFO L168 Benchmark]: CDTParser took 0.99 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 00:00:33,077 INFO L168 Benchmark]: CACSL2BoogieTranslator took 602.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2019-11-20 00:00:33,078 INFO L168 Benchmark]: Boogie Preprocessor took 68.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-20 00:00:33,078 INFO L168 Benchmark]: RCFGBuilder took 988.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 11.5 GB. [2019-11-20 00:00:33,078 INFO L168 Benchmark]: TraceAbstraction took 74153.93 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 115.9 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -114.2 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. [2019-11-20 00:00:33,080 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.99 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 602.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 68.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 988.17 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 70.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 74153.93 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 115.9 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -114.2 MB). Peak memory consumption was 1.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: incompatible size de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: incompatible size: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayIndexBasedCostEstimation.analyzeCosts(ArrayIndexBasedCostEstimation.java:211) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...