./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) 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_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6439b1baef116d71fdff38c675a38b8a29c42257 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 08:39:30,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:39:30,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:39:30,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:39:30,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:39:30,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:39:30,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:39:30,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:39:30,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:39:30,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:39:30,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:39:30,223 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:39:30,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:39:30,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:39:30,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:39:30,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:39:30,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:39:30,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:39:30,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:39:30,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:39:30,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:39:30,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:39:30,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:39:30,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:39:30,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:39:30,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:39:30,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:39:30,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:39:30,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:39:30,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:39:30,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:39:30,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:39:30,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:39:30,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:39:30,252 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:39:30,252 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:39:30,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:39:30,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:39:30,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:39:30,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:39:30,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:39:30,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2019-11-20 08:39:30,278 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:39:30,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:39:30,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:39:30,279 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:39:30,279 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:39:30,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:39:30,279 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:39:30,280 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 08:39:30,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:39:30,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:39:30,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:39:30,280 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 08:39:30,280 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 08:39:30,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:39:30,281 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 08:39:30,281 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 08:39:30,281 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:39:30,281 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:39:30,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:39:30,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:39:30,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:39:30,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:39:30,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:39:30,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:39:30,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:39:30,283 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 08:39:30,283 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 08:39:30,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 08:39:30,283 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_55896bee-7edb-4914-a506-e4810f27352c/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-memcleanup) ) 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 -> 6439b1baef116d71fdff38c675a38b8a29c42257 [2019-11-20 08:39:30,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:39:30,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:39:30,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:39:30,465 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:39:30,466 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:39:30,466 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/../../sv-benchmarks/c/list-properties/list-2.i [2019-11-20 08:39:30,518 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/data/3b7f2e887/b288e2512bcb4a939d158ffd8c20d678/FLAG9950f4a01 [2019-11-20 08:39:30,966 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:39:30,967 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/sv-benchmarks/c/list-properties/list-2.i [2019-11-20 08:39:30,979 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/data/3b7f2e887/b288e2512bcb4a939d158ffd8c20d678/FLAG9950f4a01 [2019-11-20 08:39:31,304 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/data/3b7f2e887/b288e2512bcb4a939d158ffd8c20d678 [2019-11-20 08:39:31,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:39:31,307 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 08:39:31,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:39:31,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:39:31,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:39:31,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@417e7ded and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31, skipping insertion in model container [2019-11-20 08:39:31,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,326 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:39:31,357 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:39:31,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:39:31,759 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:39:31,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:39:31,849 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:39:31,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31 WrapperNode [2019-11-20 08:39:31,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:39:31,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:39:31,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:39:31,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:39:31,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,941 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... [2019-11-20 08:39:31,947 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:39:31,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:39:31,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:39:31,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:39:31,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:39:32,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 08:39:32,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:39:32,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 08:39:32,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 08:39:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 08:39:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 08:39:32,027 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 08:39:32,028 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 08:39:32,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 08:39:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 08:39:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 08:39:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 08:39:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 08:39:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 08:39:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 08:39:32,030 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 08:39:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 08:39:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 08:39:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 08:39:32,032 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 08:39:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 08:39:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 08:39:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 08:39:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 08:39:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 08:39:32,033 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 08:39:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 08:39:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 08:39:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 08:39:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 08:39:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 08:39:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 08:39:32,034 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 08:39:32,035 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 08:39:32,036 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 08:39:32,037 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 08:39:32,037 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 08:39:32,037 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 08:39:32,037 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 08:39:32,037 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 08:39:32,037 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 08:39:32,037 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 08:39:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 08:39:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 08:39:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 08:39:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 08:39:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 08:39:32,038 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 08:39:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 08:39:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 08:39:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 08:39:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 08:39:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 08:39:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 08:39:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 08:39:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 08:39:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 08:39:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 08:39:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 08:39:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 08:39:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 08:39:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 08:39:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 08:39:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 08:39:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 08:39:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 08:39:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 08:39:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 08:39:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 08:39:32,045 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 08:39:32,046 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 08:39:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 08:39:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 08:39:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 08:39:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 08:39:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 08:39:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 08:39:32,047 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 08:39:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 08:39:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 08:39:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 08:39:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 08:39:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 08:39:32,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:39:32,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:39:32,352 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 08:39:32,724 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:39:32,725 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 08:39:32,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:39:32 BoogieIcfgContainer [2019-11-20 08:39:32,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:39:32,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:39:32,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:39:32,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:39:32,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:39:31" (1/3) ... [2019-11-20 08:39:32,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe8f0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:39:32, skipping insertion in model container [2019-11-20 08:39:32,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:39:31" (2/3) ... [2019-11-20 08:39:32,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fe8f0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:39:32, skipping insertion in model container [2019-11-20 08:39:32,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:39:32" (3/3) ... [2019-11-20 08:39:32,737 INFO L109 eAbstractionObserver]: Analyzing ICFG list-2.i [2019-11-20 08:39:32,745 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:39:32,753 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2019-11-20 08:39:32,771 INFO L249 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2019-11-20 08:39:32,788 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:39:32,789 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 08:39:32,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:39:32,789 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:39:32,789 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:39:32,789 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:39:32,789 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:39:32,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:39:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2019-11-20 08:39:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 08:39:32,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:32,817 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:32,818 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:32,823 INFO L82 PathProgramCache]: Analyzing trace with hash 41225819, now seen corresponding path program 1 times [2019-11-20 08:39:32,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:32,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1404160193] [2019-11-20 08:39:32,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:33,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:39:33,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:33,074 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 08:39:33,074 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:33,083 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:33,084 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:33,084 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:39:33,099 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 08:39:33,100 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:33,110 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 08:39:33,111 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1404160193] [2019-11-20 08:39:33,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:33,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 08:39:33,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048893085] [2019-11-20 08:39:33,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:39:33,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:33,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:39:33,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:39:33,133 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2019-11-20 08:39:33,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:33,497 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2019-11-20 08:39:33,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:39:33,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-20 08:39:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:33,509 INFO L225 Difference]: With dead ends: 75 [2019-11-20 08:39:33,509 INFO L226 Difference]: Without dead ends: 66 [2019-11-20 08:39:33,511 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:39:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-20 08:39:33,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-11-20 08:39:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-20 08:39:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2019-11-20 08:39:33,566 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 10 [2019-11-20 08:39:33,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:33,566 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2019-11-20 08:39:33,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:39:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2019-11-20 08:39:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 08:39:33,567 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:33,567 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:33,767 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:33,768 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:33,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:33,768 INFO L82 PathProgramCache]: Analyzing trace with hash 41225820, now seen corresponding path program 1 times [2019-11-20 08:39:33,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:33,768 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1533589655] [2019-11-20 08:39:33,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:33,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:39:33,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:33,954 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 08:39:33,955 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:33,962 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:33,962 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:33,962 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:39:33,991 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 08:39:33,991 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:34,088 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 08:39:34,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1533589655] [2019-11-20 08:39:34,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:34,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 08:39:34,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963568664] [2019-11-20 08:39:34,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 08:39:34,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 08:39:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:39:34,091 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 6 states. [2019-11-20 08:39:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:34,534 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2019-11-20 08:39:34,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 08:39:34,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 08:39:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:34,537 INFO L225 Difference]: With dead ends: 83 [2019-11-20 08:39:34,537 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 08:39:34,538 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 [2019-11-20 08:39:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 08:39:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 73. [2019-11-20 08:39:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-20 08:39:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2019-11-20 08:39:34,554 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 10 [2019-11-20 08:39:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:34,555 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2019-11-20 08:39:34,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 08:39:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2019-11-20 08:39:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 08:39:34,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:34,556 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:34,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:34,757 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:34,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:34,757 INFO L82 PathProgramCache]: Analyzing trace with hash -886979369, now seen corresponding path program 1 times [2019-11-20 08:39:34,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:34,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2130735123] [2019-11-20 08:39:34,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:34,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 08:39:34,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:35,012 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 08:39:35,012 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:35,018 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:35,019 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:35,019 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 08:39:35,061 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 [2019-11-20 08:39:35,061 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:35,063 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:35,064 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 08:39:35,064 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-20 08:39:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:35,075 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:35,149 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-20 08:39:35,150 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 08:39:35,162 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:35,163 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-20 08:39:35,163 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-20 08:39:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:35,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2130735123] [2019-11-20 08:39:35,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:35,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-20 08:39:35,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176402139] [2019-11-20 08:39:35,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 08:39:35,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:35,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 08:39:35,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:39:35,204 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 11 states. [2019-11-20 08:39:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:36,080 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2019-11-20 08:39:36,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 08:39:36,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-11-20 08:39:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:36,083 INFO L225 Difference]: With dead ends: 145 [2019-11-20 08:39:36,083 INFO L226 Difference]: Without dead ends: 145 [2019-11-20 08:39:36,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-20 08:39:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-20 08:39:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 80. [2019-11-20 08:39:36,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-20 08:39:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2019-11-20 08:39:36,092 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 17 [2019-11-20 08:39:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:36,092 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2019-11-20 08:39:36,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 08:39:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2019-11-20 08:39:36,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 08:39:36,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:36,093 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:36,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:36,305 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1656993711, now seen corresponding path program 1 times [2019-11-20 08:39:36,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:36,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [759265171] [2019-11-20 08:39:36,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:36,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:39:36,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:36,501 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:36,502 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 12 treesize of output 28 [2019-11-20 08:39:36,502 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:36,529 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:39:36,530 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:36,530 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-20 08:39:36,549 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 08:39:36,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:36,570 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:36,571 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 08:39:36,572 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-20 08:39:36,597 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 [2019-11-20 08:39:36,597 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:36,607 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:36,608 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:39:36,608 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2019-11-20 08:39:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:36,633 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:36,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [759265171] [2019-11-20 08:39:36,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:36,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 08:39:36,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797507716] [2019-11-20 08:39:36,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:39:36,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:39:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:39:36,664 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand 8 states. [2019-11-20 08:39:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:37,303 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2019-11-20 08:39:37,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 08:39:37,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-20 08:39:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:37,305 INFO L225 Difference]: With dead ends: 102 [2019-11-20 08:39:37,306 INFO L226 Difference]: Without dead ends: 102 [2019-11-20 08:39:37,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:39:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-20 08:39:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2019-11-20 08:39:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 08:39:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2019-11-20 08:39:37,318 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 17 [2019-11-20 08:39:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:37,318 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2019-11-20 08:39:37,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:39:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2019-11-20 08:39:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 08:39:37,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:37,319 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:37,529 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:37,534 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:37,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1656993712, now seen corresponding path program 1 times [2019-11-20 08:39:37,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:37,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1432930690] [2019-11-20 08:39:37,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:37,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:39:37,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:37,724 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 08:39:37,725 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:37,729 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:37,730 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:37,730 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:39:37,746 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 08:39:37,746 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:37,756 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:37,760 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 08:39:37,761 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:37,769 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:37,770 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 08:39:37,770 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-20 08:39:37,798 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 23 treesize of output 11 [2019-11-20 08:39:37,799 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:37,816 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:37,818 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 [2019-11-20 08:39:37,819 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:37,825 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:37,826 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 08:39:37,826 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2019-11-20 08:39:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:37,858 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:38,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1432930690] [2019-11-20 08:39:38,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:38,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 08:39:38,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894111255] [2019-11-20 08:39:38,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:39:38,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:38,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:39:38,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:39:38,038 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 10 states. [2019-11-20 08:39:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:39,091 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2019-11-20 08:39:39,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:39:39,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-20 08:39:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:39,093 INFO L225 Difference]: With dead ends: 103 [2019-11-20 08:39:39,093 INFO L226 Difference]: Without dead ends: 103 [2019-11-20 08:39:39,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-20 08:39:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-20 08:39:39,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2019-11-20 08:39:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-20 08:39:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2019-11-20 08:39:39,100 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 17 [2019-11-20 08:39:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:39,101 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2019-11-20 08:39:39,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:39:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2019-11-20 08:39:39,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 08:39:39,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:39,102 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:39,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:39,306 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:39,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:39,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1044897063, now seen corresponding path program 1 times [2019-11-20 08:39:39,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:39,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1729058650] [2019-11-20 08:39:39,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:39,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:39:39,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:39,520 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:39,520 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 12 treesize of output 28 [2019-11-20 08:39:39,521 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:39,542 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:39:39,543 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:39,543 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-20 08:39:39,556 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 08:39:39,556 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:39,565 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:39,565 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 08:39:39,566 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-20 08:39:39,584 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 [2019-11-20 08:39:39,585 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:39,597 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:39,597 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:39:39,598 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:13 [2019-11-20 08:39:39,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:39,617 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:39,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1729058650] [2019-11-20 08:39:39,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:39,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 08:39:39,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010397754] [2019-11-20 08:39:39,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:39:39,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:39,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:39:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:39:39,651 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 8 states. [2019-11-20 08:39:39,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:39,969 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2019-11-20 08:39:39,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 08:39:39,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-20 08:39:39,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:39,970 INFO L225 Difference]: With dead ends: 96 [2019-11-20 08:39:39,970 INFO L226 Difference]: Without dead ends: 96 [2019-11-20 08:39:39,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:39:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-20 08:39:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2019-11-20 08:39:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 08:39:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2019-11-20 08:39:39,979 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 18 [2019-11-20 08:39:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:39,980 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2019-11-20 08:39:39,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:39:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2019-11-20 08:39:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 08:39:39,981 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:39,981 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:40,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:40,184 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:40,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1044897062, now seen corresponding path program 1 times [2019-11-20 08:39:40,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:40,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1666648329] [2019-11-20 08:39:40,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:40,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:39:40,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:40,349 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 08:39:40,349 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:40,356 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:40,356 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:40,356 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:39:40,383 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 08:39:40,383 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:40,397 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:40,406 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 08:39:40,406 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:40,421 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:40,422 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 08:39:40,422 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-20 08:39:40,450 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 23 treesize of output 11 [2019-11-20 08:39:40,450 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:40,460 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:40,463 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 [2019-11-20 08:39:40,463 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:40,467 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:40,468 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 08:39:40,468 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:9 [2019-11-20 08:39:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:40,492 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:40,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666648329] [2019-11-20 08:39:40,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:40,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 08:39:40,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222563378] [2019-11-20 08:39:40,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:39:40,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:39:40,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:39:40,660 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 10 states. [2019-11-20 08:39:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:41,609 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-11-20 08:39:41,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:39:41,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-20 08:39:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:41,610 INFO L225 Difference]: With dead ends: 94 [2019-11-20 08:39:41,610 INFO L226 Difference]: Without dead ends: 94 [2019-11-20 08:39:41,611 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-20 08:39:41,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-20 08:39:41,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2019-11-20 08:39:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-20 08:39:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2019-11-20 08:39:41,616 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 18 [2019-11-20 08:39:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:41,617 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2019-11-20 08:39:41,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:39:41,617 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2019-11-20 08:39:41,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 08:39:41,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:41,618 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:39:41,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:41,820 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:41,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:41,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2031227228, now seen corresponding path program 1 times [2019-11-20 08:39:41,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:41,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [644441446] [2019-11-20 08:39:41,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:39:41,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 08:39:41,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:39:41,986 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 08:39:41,986 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:41,993 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:41,993 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:39:41,994 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-20 08:39:42,022 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 [2019-11-20 08:39:42,023 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:39:42,025 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:42,026 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 08:39:42,026 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2019-11-20 08:39:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:42,035 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:39:42,097 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2019-11-20 08:39:42,097 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 08:39:42,101 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:39:42,102 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-20 08:39:42,102 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:7 [2019-11-20 08:39:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:39:42,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [644441446] [2019-11-20 08:39:42,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:39:42,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-11-20 08:39:42,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240624703] [2019-11-20 08:39:42,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 08:39:42,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:39:42,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 08:39:42,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:39:42,120 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 11 states. [2019-11-20 08:39:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:39:42,708 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2019-11-20 08:39:42,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 08:39:42,709 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-20 08:39:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:39:42,710 INFO L225 Difference]: With dead ends: 126 [2019-11-20 08:39:42,710 INFO L226 Difference]: Without dead ends: 126 [2019-11-20 08:39:42,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-20 08:39:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-20 08:39:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2019-11-20 08:39:42,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 08:39:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-11-20 08:39:42,715 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 19 [2019-11-20 08:39:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:39:42,716 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-11-20 08:39:42,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 08:39:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-11-20 08:39:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 08:39:42,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:39:42,717 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] [2019-11-20 08:39:42,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:42,917 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr24ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 08:39:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:39:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1454840270, now seen corresponding path program 1 times [2019-11-20 08:39:42,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:39:42,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [871691083] [2019-11-20 08:39:42,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:39:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 08:39:43,189 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 08:39:43,189 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 08:39:43,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:39:43,401 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-20 08:39:43,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 08:39:43 BoogieIcfgContainer [2019-11-20 08:39:43,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 08:39:43,413 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 08:39:43,413 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 08:39:43,413 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 08:39:43,413 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:39:32" (3/4) ... [2019-11-20 08:39:43,415 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 08:39:43,418 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-20 08:39:43,459 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_55896bee-7edb-4914-a506-e4810f27352c/bin/uautomizer/witness.graphml [2019-11-20 08:39:43,459 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 08:39:43,463 INFO L168 Benchmark]: Toolchain (without parser) took 12153.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 184.0 MB). Free memory was 944.7 MB in the beginning and 903.6 MB in the end (delta: 41.1 MB). Peak memory consumption was 225.1 MB. Max. memory is 11.5 GB. [2019-11-20 08:39:43,463 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:39:43,464 INFO L168 Benchmark]: CACSL2BoogieTranslator took 542.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -177.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-20 08:39:43,464 INFO L168 Benchmark]: Boogie Preprocessor took 96.28 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:39:43,464 INFO L168 Benchmark]: RCFGBuilder took 778.65 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: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 11.5 GB. [2019-11-20 08:39:43,465 INFO L168 Benchmark]: TraceAbstraction took 10685.55 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.1 GB in the beginning and 911.6 MB in the end (delta: 148.8 MB). Peak memory consumption was 189.6 MB. Max. memory is 11.5 GB. [2019-11-20 08:39:43,465 INFO L168 Benchmark]: Witness Printer took 46.93 ms. Allocated memory is still 1.2 GB. Free memory was 911.6 MB in the beginning and 903.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. [2019-11-20 08:39:43,474 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 542.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -177.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 96.28 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 778.65 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: 56.0 MB). Peak memory consumption was 56.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 10685.55 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.1 GB in the beginning and 911.6 MB in the end (delta: 148.8 MB). Peak memory consumption was 189.6 MB. Max. memory is 11.5 GB. * Witness Printer took 46.93 ms. Allocated memory is still 1.2 GB. Free memory was 911.6 MB in the beginning and 903.6 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 520]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L522] COND FALSE !(a == 0) VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L523] List t; [L524] List p = a; VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L540] p = a VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L541] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L541] COND FALSE !(p->h == 2) [L543] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L543] COND FALSE !(p->h == 1) [L545] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=3] [L545] COND FALSE !(p->h != 3) [L547] return 0; VAL [\result=0, a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 86 locations, 25 error locations. Result: UNSAFE, OverallTime: 10.6s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 321 SDtfs, 954 SDslu, 1077 SDs, 0 SdLazy, 1476 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 280 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 225 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 236 ConstructedInterpolants, 0 QuantifiedInterpolants, 18076 SizeOfPredicates, 64 NumberOfNonLiveVariables, 496 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 16/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...