./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f2222db53b1ba3adad8f3ce16bd4a15f62841c2c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-19 21:59:24,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-19 21:59:24,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-19 21:59:24,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-19 21:59:24,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-19 21:59:24,472 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-19 21:59:24,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-19 21:59:24,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-19 21:59:24,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-19 21:59:24,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-19 21:59:24,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-19 21:59:24,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-19 21:59:24,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-19 21:59:24,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-19 21:59:24,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-19 21:59:24,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-19 21:59:24,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-19 21:59:24,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-19 21:59:24,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-19 21:59:24,491 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-19 21:59:24,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-19 21:59:24,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-19 21:59:24,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-19 21:59:24,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-19 21:59:24,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-19 21:59:24,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-19 21:59:24,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-19 21:59:24,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-19 21:59:24,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-19 21:59:24,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-19 21:59:24,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-19 21:59:24,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-19 21:59:24,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-19 21:59:24,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-19 21:59:24,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-19 21:59:24,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-19 21:59:24,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-19 21:59:24,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-19 21:59:24,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-19 21:59:24,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-19 21:59:24,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-19 21:59:24,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-19 21:59:24,522 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-19 21:59:24,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-19 21:59:24,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-19 21:59:24,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-19 21:59:24,524 INFO L138 SettingsManager]: * Use SBE=true [2019-11-19 21:59:24,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-19 21:59:24,524 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-19 21:59:24,525 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-19 21:59:24,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-19 21:59:24,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-19 21:59:24,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-19 21:59:24,525 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-19 21:59:24,526 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-19 21:59:24,526 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-19 21:59:24,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-19 21:59:24,526 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-19 21:59:24,526 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-19 21:59:24,527 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-19 21:59:24,527 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-19 21:59:24,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-19 21:59:24,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-19 21:59:24,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-19 21:59:24,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-19 21:59:24,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:59:24,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-19 21:59:24,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-19 21:59:24,529 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-19 21:59:24,529 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-19 21:59:24,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-19 21:59:24,529 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_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2222db53b1ba3adad8f3ce16bd4a15f62841c2c [2019-11-19 21:59:24,665 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-19 21:59:24,675 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-19 21:59:24,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-19 21:59:24,680 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-19 21:59:24,680 INFO L275 PluginConnector]: CDTParser initialized [2019-11-19 21:59:24,681 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2019-11-19 21:59:24,730 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/data/3bffec9f6/7dfe756c28d2489f8372f757037baa15/FLAGbd62a6c8e [2019-11-19 21:59:25,215 INFO L306 CDTParser]: Found 1 translation units. [2019-11-19 21:59:25,216 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/sv-benchmarks/c/list-ext-properties/test-0158_1-3.i [2019-11-19 21:59:25,229 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/data/3bffec9f6/7dfe756c28d2489f8372f757037baa15/FLAGbd62a6c8e [2019-11-19 21:59:25,511 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/data/3bffec9f6/7dfe756c28d2489f8372f757037baa15 [2019-11-19 21:59:25,514 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-19 21:59:25,515 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-19 21:59:25,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-19 21:59:25,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-19 21:59:25,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-19 21:59:25,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:59:25" (1/1) ... [2019-11-19 21:59:25,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e410b99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:25, skipping insertion in model container [2019-11-19 21:59:25,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:59:25" (1/1) ... [2019-11-19 21:59:25,528 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-19 21:59:25,563 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-19 21:59:25,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:59:25,911 INFO L188 MainTranslator]: Completed pre-run [2019-11-19 21:59:25,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-19 21:59:26,014 INFO L192 MainTranslator]: Completed translation [2019-11-19 21:59:26,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26 WrapperNode [2019-11-19 21:59:26,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-19 21:59:26,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-19 21:59:26,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-19 21:59:26,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-19 21:59:26,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... [2019-11-19 21:59:26,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... [2019-11-19 21:59:26,047 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... [2019-11-19 21:59:26,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... [2019-11-19 21:59:26,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... [2019-11-19 21:59:26,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... [2019-11-19 21:59:26,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... [2019-11-19 21:59:26,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-19 21:59:26,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-19 21:59:26,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-19 21:59:26,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-19 21:59:26,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-19 21:59:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-19 21:59:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-19 21:59:26,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-19 21:59:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-19 21:59:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-19 21:59:26,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-19 21:59:26,254 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-19 21:59:26,255 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-19 21:59:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-19 21:59:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-19 21:59:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-19 21:59:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-19 21:59:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-19 21:59:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-19 21:59:26,260 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-19 21:59:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-19 21:59:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-19 21:59:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-19 21:59:26,261 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-19 21:59:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-19 21:59:26,262 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-19 21:59:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-19 21:59:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-19 21:59:26,263 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-19 21:59:26,264 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-19 21:59:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-19 21:59:26,265 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-19 21:59:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-19 21:59:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-19 21:59:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-19 21:59:26,281 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-19 21:59:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-19 21:59:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-19 21:59:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-19 21:59:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-19 21:59:26,282 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-19 21:59:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-19 21:59:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-19 21:59:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-19 21:59:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-19 21:59:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-19 21:59:26,283 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-19 21:59:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-19 21:59:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-19 21:59:26,284 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-19 21:59:26,288 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-19 21:59:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-19 21:59:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-19 21:59:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-19 21:59:26,289 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-19 21:59:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-19 21:59:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-19 21:59:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-19 21:59:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-19 21:59:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-19 21:59:26,290 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-19 21:59:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-19 21:59:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-19 21:59:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-19 21:59:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-19 21:59:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-19 21:59:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-19 21:59:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-19 21:59:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-19 21:59:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-19 21:59:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-19 21:59:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-19 21:59:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-19 21:59:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-19 21:59:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-19 21:59:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-19 21:59:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-19 21:59:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-19 21:59:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-19 21:59:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-19 21:59:26,294 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-19 21:59:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-19 21:59:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-19 21:59:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-19 21:59:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-19 21:59:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-19 21:59:26,296 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-19 21:59:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-19 21:59:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-19 21:59:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-19 21:59:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-19 21:59:26,297 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-19 21:59:26,298 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-19 21:59:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-19 21:59:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-19 21:59:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-19 21:59:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-19 21:59:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-19 21:59:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-19 21:59:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-19 21:59:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-19 21:59:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-19 21:59:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-19 21:59:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-19 21:59:26,300 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-19 21:59:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-19 21:59:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-19 21:59:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-19 21:59:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-19 21:59:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-19 21:59:26,301 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-19 21:59:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-19 21:59:26,302 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-19 21:59:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-19 21:59:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-19 21:59:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-19 21:59:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-19 21:59:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-19 21:59:26,303 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-19 21:59:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-19 21:59:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-19 21:59:26,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-19 21:59:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-19 21:59:26,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-19 21:59:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-19 21:59:26,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-19 21:59:26,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-19 21:59:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-19 21:59:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-19 21:59:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-19 21:59:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-19 21:59:26,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-19 21:59:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-19 21:59:26,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-19 21:59:26,968 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-19 21:59:26,968 INFO L285 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-19 21:59:26,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:59:26 BoogieIcfgContainer [2019-11-19 21:59:26,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-19 21:59:26,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-19 21:59:26,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-19 21:59:26,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-19 21:59:26,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:59:25" (1/3) ... [2019-11-19 21:59:26,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ac59c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:59:26, skipping insertion in model container [2019-11-19 21:59:26,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:59:26" (2/3) ... [2019-11-19 21:59:26,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ac59c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:59:26, skipping insertion in model container [2019-11-19 21:59:26,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:59:26" (3/3) ... [2019-11-19 21:59:26,976 INFO L109 eAbstractionObserver]: Analyzing ICFG test-0158_1-3.i [2019-11-19 21:59:26,983 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-19 21:59:26,989 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2019-11-19 21:59:27,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2019-11-19 21:59:27,018 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-19 21:59:27,018 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-19 21:59:27,018 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-19 21:59:27,019 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-19 21:59:27,019 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-19 21:59:27,019 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-19 21:59:27,019 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-19 21:59:27,019 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-19 21:59:27,034 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-11-19 21:59:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-19 21:59:27,042 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:27,043 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:27,044 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1406256573, now seen corresponding path program 1 times [2019-11-19 21:59:27,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:27,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1547403317] [2019-11-19 21:59:27,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:27,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 21:59:27,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:27,348 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-19 21:59:27,349 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 19 treesize of output 18 [2019-11-19 21:59:27,349 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:27,361 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:27,364 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:27,364 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-11-19 21:59:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:27,388 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:27,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1547403317] [2019-11-19 21:59:27,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:27,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 21:59:27,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356731900] [2019-11-19 21:59:27,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 21:59:27,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 21:59:27,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:59:27,439 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2019-11-19 21:59:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:27,583 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-11-19 21:59:27,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 21:59:27,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-19 21:59:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:27,597 INFO L225 Difference]: With dead ends: 40 [2019-11-19 21:59:27,598 INFO L226 Difference]: Without dead ends: 37 [2019-11-19 21:59:27,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:59:27,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-19 21:59:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-19 21:59:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-19 21:59:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-19 21:59:27,658 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 7 [2019-11-19 21:59:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:27,658 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-19 21:59:27,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 21:59:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-19 21:59:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-19 21:59:27,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:27,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:27,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:27,860 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1406256572, now seen corresponding path program 1 times [2019-11-19 21:59:27,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:27,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [674859242] [2019-11-19 21:59:27,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:28,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-19 21:59:28,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:28,048 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_21|], 1=[|v_#valid_38|]} [2019-11-19 21:59:28,054 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 21:59:28,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 21:59:28,057 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:28,071 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:28,075 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 21:59:28,080 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-11-19 21:59:28,081 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:28,095 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:28,096 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:28,097 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2019-11-19 21:59:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:28,115 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:28,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:28,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674859242] [2019-11-19 21:59:28,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:28,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-19 21:59:28,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074881393] [2019-11-19 21:59:28,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-19 21:59:28,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-19 21:59:28,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:59:28,168 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 4 states. [2019-11-19 21:59:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:28,245 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-19 21:59:28,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-19 21:59:28,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-19 21:59:28,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:28,247 INFO L225 Difference]: With dead ends: 30 [2019-11-19 21:59:28,247 INFO L226 Difference]: Without dead ends: 30 [2019-11-19 21:59:28,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-19 21:59:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-19 21:59:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-19 21:59:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 21:59:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-19 21:59:28,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 7 [2019-11-19 21:59:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:28,253 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-19 21:59:28,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-19 21:59:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-19 21:59:28,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 21:59:28,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:28,254 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:28,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:28,461 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:28,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:28,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1892987731, now seen corresponding path program 1 times [2019-11-19 21:59:28,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:28,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1231602534] [2019-11-19 21:59:28,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:28,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-19 21:59:28,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:28,670 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-19 21:59:28,670 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:28,674 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:28,674 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:28,674 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:9 [2019-11-19 21:59:28,701 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-11-19 21:59:28,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:28,704 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:28,704 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:28,705 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:5 [2019-11-19 21:59:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:28,715 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:28,752 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1231602534] [2019-11-19 21:59:28,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:28,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-19 21:59:28,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85803222] [2019-11-19 21:59:28,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:59:28,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:59:28,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:59:28,754 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 6 states. [2019-11-19 21:59:28,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:28,915 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-11-19 21:59:28,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-19 21:59:28,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-19 21:59:28,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:28,917 INFO L225 Difference]: With dead ends: 46 [2019-11-19 21:59:28,917 INFO L226 Difference]: Without dead ends: 46 [2019-11-19 21:59:28,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:59:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-19 21:59:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2019-11-19 21:59:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-19 21:59:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-19 21:59:28,923 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 15 [2019-11-19 21:59:28,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:28,924 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-19 21:59:28,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:59:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-19 21:59:28,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-19 21:59:28,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:28,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:29,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:29,125 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2040751091, now seen corresponding path program 1 times [2019-11-19 21:59:29,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:29,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1315683322] [2019-11-19 21:59:29,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:29,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 21:59:29,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:29,339 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 21:59:29,339 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:29,344 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:29,344 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:29,344 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-19 21:59:29,363 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 21:59:29,364 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-11-19 21:59:29,365 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:29,370 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:29,370 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:29,370 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2019-11-19 21:59:29,376 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-19 21:59:29,377 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:29,379 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:29,379 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:29,380 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-11-19 21:59:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:29,388 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:29,413 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:29,416 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:29,417 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:29,417 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2019-11-19 21:59:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:29,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1315683322] [2019-11-19 21:59:29,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:29,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-19 21:59:29,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993636281] [2019-11-19 21:59:29,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 21:59:29,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 21:59:29,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:59:29,455 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 7 states. [2019-11-19 21:59:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:29,564 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-11-19 21:59:29,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-19 21:59:29,564 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-19 21:59:29,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:29,565 INFO L225 Difference]: With dead ends: 31 [2019-11-19 21:59:29,565 INFO L226 Difference]: Without dead ends: 31 [2019-11-19 21:59:29,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-19 21:59:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-19 21:59:29,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-19 21:59:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-19 21:59:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-11-19 21:59:29,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 15 [2019-11-19 21:59:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:29,571 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-11-19 21:59:29,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 21:59:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-11-19 21:59:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-19 21:59:29,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:29,572 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:29,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:29,773 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:29,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:29,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1161225543, now seen corresponding path program 1 times [2019-11-19 21:59:29,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:29,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2096197822] [2019-11-19 21:59:29,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:29,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 21:59:29,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:30,019 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 21:59:30,019 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,035 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:30,035 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,036 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2019-11-19 21:59:30,076 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 21:59:30,078 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2019-11-19 21:59:30,078 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,094 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:30,094 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,094 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:14 [2019-11-19 21:59:30,103 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-19 21:59:30,103 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,114 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:30,115 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,115 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2019-11-19 21:59:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:30,130 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:30,158 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:30,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:30,162 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:30,162 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2019-11-19 21:59:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:30,219 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096197822] [2019-11-19 21:59:30,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:30,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2019-11-19 21:59:30,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643146183] [2019-11-19 21:59:30,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-19 21:59:30,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:30,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-19 21:59:30,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-19 21:59:30,220 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 9 states. [2019-11-19 21:59:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:30,501 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-19 21:59:30,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:59:30,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-11-19 21:59:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:30,503 INFO L225 Difference]: With dead ends: 30 [2019-11-19 21:59:30,503 INFO L226 Difference]: Without dead ends: 30 [2019-11-19 21:59:30,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-19 21:59:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-19 21:59:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-19 21:59:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-19 21:59:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-19 21:59:30,507 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 16 [2019-11-19 21:59:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:30,507 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-19 21:59:30,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-19 21:59:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-19 21:59:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-19 21:59:30,508 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:30,508 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:30,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:30,711 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:30,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1638253387, now seen corresponding path program 1 times [2019-11-19 21:59:30,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:30,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [322496795] [2019-11-19 21:59:30,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:30,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-19 21:59:30,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:30,929 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-19 21:59:30,930 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 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-19 21:59:30,930 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,937 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:30,938 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,938 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:14 [2019-11-19 21:59:30,955 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 21:59:30,955 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,966 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:30,967 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:30,967 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:20 [2019-11-19 21:59:30,997 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-19 21:59:30,999 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2019-11-19 21:59:30,999 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:31,007 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:31,008 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:31,008 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:20 [2019-11-19 21:59:31,029 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 11 [2019-11-19 21:59:31,030 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:31,063 INFO L567 ElimStorePlain]: treesize reduction 5, result has 75.0 percent of original size [2019-11-19 21:59:31,064 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:31,064 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:15 [2019-11-19 21:59:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:31,088 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:31,131 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:31,139 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:31,139 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-19 21:59:31,140 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:25 [2019-11-19 21:59:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:31,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322496795] [2019-11-19 21:59:31,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:31,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-19 21:59:31,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292544194] [2019-11-19 21:59:31,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-19 21:59:31,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:31,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-19 21:59:31,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-19 21:59:31,293 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 7 states. [2019-11-19 21:59:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:31,440 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-11-19 21:59:31,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-19 21:59:31,440 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-19 21:59:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:31,442 INFO L225 Difference]: With dead ends: 29 [2019-11-19 21:59:31,442 INFO L226 Difference]: Without dead ends: 29 [2019-11-19 21:59:31,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-19 21:59:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-19 21:59:31,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-19 21:59:31,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-19 21:59:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-19 21:59:31,445 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2019-11-19 21:59:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:31,446 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-19 21:59:31,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-19 21:59:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-19 21:59:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-19 21:59:31,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:31,446 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:31,647 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:31,647 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash 753752635, now seen corresponding path program 1 times [2019-11-19 21:59:31,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:31,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1512987016] [2019-11-19 21:59:31,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:31,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-19 21:59:31,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:31,801 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 21:59:31,802 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:31,804 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:31,804 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:31,804 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-19 21:59:31,822 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-19 21:59:31,823 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:31,825 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:31,825 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:31,825 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-19 21:59:31,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:31,837 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:31,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512987016] [2019-11-19 21:59:31,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:31,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-19 21:59:31,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150272668] [2019-11-19 21:59:31,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-19 21:59:31,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:31,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-19 21:59:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-19 21:59:31,845 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2019-11-19 21:59:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:31,949 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-11-19 21:59:31,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-19 21:59:31,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-19 21:59:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:31,950 INFO L225 Difference]: With dead ends: 28 [2019-11-19 21:59:31,950 INFO L226 Difference]: Without dead ends: 28 [2019-11-19 21:59:31,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-19 21:59:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-19 21:59:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-19 21:59:31,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-19 21:59:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-19 21:59:31,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 18 [2019-11-19 21:59:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:31,953 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-19 21:59:31,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-19 21:59:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-19 21:59:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-19 21:59:31,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:31,954 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:32,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:32,155 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:32,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1891495287, now seen corresponding path program 1 times [2019-11-19 21:59:32,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:32,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1705505445] [2019-11-19 21:59:32,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-19 21:59:32,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-19 21:59:32,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-19 21:59:32,360 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-19 21:59:32,360 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:32,372 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:32,372 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:32,373 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:11 [2019-11-19 21:59:32,400 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-19 21:59:32,401 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-19 21:59:32,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-19 21:59:32,408 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-19 21:59:32,409 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2019-11-19 21:59:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:32,460 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-19 21:59:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-19 21:59:32,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1705505445] [2019-11-19 21:59:32,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-19 21:59:32,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 10 [2019-11-19 21:59:32,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518072668] [2019-11-19 21:59:32,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-19 21:59:32,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-19 21:59:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-19 21:59:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-19 21:59:32,536 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 11 states. [2019-11-19 21:59:32,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-19 21:59:32,837 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-19 21:59:32,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-19 21:59:32,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-19 21:59:32,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-19 21:59:32,837 INFO L225 Difference]: With dead ends: 27 [2019-11-19 21:59:32,837 INFO L226 Difference]: Without dead ends: 27 [2019-11-19 21:59:32,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-19 21:59:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-19 21:59:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-19 21:59:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-19 21:59:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-19 21:59:32,841 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2019-11-19 21:59:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-19 21:59:32,841 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-19 21:59:32,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-19 21:59:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-19 21:59:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-19 21:59:32,842 INFO L402 BasicCegarLoop]: Found error trace [2019-11-19 21:59:32,842 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-19 21:59:33,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:33,046 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr19ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr17ASSERT_VIOLATIONMEMORY_FREE, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr18ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-19 21:59:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-19 21:59:33,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1493188163, now seen corresponding path program 1 times [2019-11-19 21:59:33,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-19 21:59:33,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1635006067] [2019-11-19 21:59:33,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:59:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-19 21:59:33,285 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-19 21:59:33,285 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-19 21:59:33,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-19 21:59:33,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 09:59:33 BoogieIcfgContainer [2019-11-19 21:59:33,510 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-19 21:59:33,511 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-19 21:59:33,511 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-19 21:59:33,511 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-19 21:59:33,512 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:59:26" (3/4) ... [2019-11-19 21:59:33,513 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-19 21:59:33,560 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0f92fb50-fb9b-44f8-8a86-d8f4c85dd134/bin/uautomizer/witness.graphml [2019-11-19 21:59:33,560 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-19 21:59:33,561 INFO L168 Benchmark]: Toolchain (without parser) took 8046.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 212.3 MB). Free memory was 946.1 MB in the beginning and 973.0 MB in the end (delta: -26.9 MB). Peak memory consumption was 185.5 MB. Max. memory is 11.5 GB. [2019-11-19 21:59:33,561 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:59:33,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 498.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-11-19 21:59:33,562 INFO L168 Benchmark]: Boogie Preprocessor took 90.64 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-19 21:59:33,563 INFO L168 Benchmark]: RCFGBuilder took 863.55 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: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 11.5 GB. [2019-11-19 21:59:33,563 INFO L168 Benchmark]: TraceAbstraction took 6540.01 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 62.9 MB). Free memory was 1.1 GB in the beginning and 975.6 MB in the end (delta: 93.8 MB). Peak memory consumption was 156.7 MB. Max. memory is 11.5 GB. [2019-11-19 21:59:33,563 INFO L168 Benchmark]: Witness Printer took 49.10 ms. Allocated memory is still 1.2 GB. Free memory was 975.6 MB in the beginning and 973.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. [2019-11-19 21:59:33,565 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 498.96 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -177.8 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 90.64 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 863.55 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: 54.5 MB). Peak memory consumption was 54.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6540.01 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 62.9 MB). Free memory was 1.1 GB in the beginning and 975.6 MB in the end (delta: 93.8 MB). Peak memory consumption was 156.7 MB. Max. memory is 11.5 GB. * Witness Printer took 49.10 ms. Allocated memory is still 1.2 GB. Free memory was 975.6 MB in the beginning and 973.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 534]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L515-L522] union { void *p0; struct { char c[2]; int p1; int p2; } str; } data; [L523] data.p0 = malloc(37U) VAL [data={14826754:0}, malloc(37U)={14825730:0}] [L524] EXPR data.p0 VAL [data={14826754:0}, data.p0={14825730:0}, malloc(37U)={14825730:0}] [L524] void *ptr = data.p0; [L525] COND FALSE !(__VERIFIER_nondet_int()) [L528] data.str.p2 = 30 VAL [data={14826754:0}, malloc(37U)={14825730:0}, ptr={14825730:0}] [L530] EXPR data.str.p2 VAL [data={14826754:0}, data.str.p2=30, malloc(37U)={14825730:0}, ptr={14825730:0}] [L530] COND FALSE !(25 > data.str.p2) [L533] EXPR data.p0 VAL [data={14826754:0}, data.p0={14825730:0}, malloc(37U)={14825730:0}, ptr={14825730:0}] [L533] free(data.p0) VAL [data={14826754:0}, data.p0={14825730:0}, malloc(37U)={14825730:0}, ptr={14825730:0}] [L533] free(data.p0) VAL [data={14826754:0}, data.p0={14825730:0}, malloc(37U)={14825730:0}, ptr={14825730:0}] [L533] free(data.p0) [L534] free(ptr) VAL [data={14826754:0}, malloc(37U)={14825730:0}, ptr={14825730:0}] [L534] free(ptr) VAL [data={14826754:0}, malloc(37U)={14825730:0}, ptr={14825730:0}] [L534] free(ptr) VAL [data={14826754:0}, malloc(37U)={14825730:0}, ptr={14825730:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 62 locations, 21 error locations. Result: UNSAFE, OverallTime: 6.4s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 172 SDtfs, 295 SDslu, 300 SDs, 0 SdLazy, 254 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 236 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 14 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 134 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 212 ConstructedInterpolants, 2 QuantifiedInterpolants, 16266 SizeOfPredicates, 29 NumberOfNonLiveVariables, 519 ConjunctsInSsa, 41 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...