./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 573d04c3ab16ffed1ccac6c6179d92b670a825d7 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 04:22:16,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:22:16,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:22:16,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:22:16,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:22:16,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:22:16,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:22:16,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:22:16,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:22:16,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:22:16,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:22:16,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:22:16,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:22:16,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:22:16,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:22:16,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:22:16,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:22:16,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:22:16,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:22:16,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:22:16,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:22:16,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:22:16,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:22:16,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:22:16,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:22:16,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:22:16,289 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:22:16,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:22:16,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:22:16,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:22:16,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:22:16,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:22:16,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:22:16,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:22:16,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:22:16,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:22:16,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:22:16,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:22:16,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:22:16,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:22:16,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:22:16,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 04:22:16,335 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:22:16,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:22:16,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:22:16,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:22:16,338 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:22:16,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:22:16,339 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:22:16,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:22:16,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:22:16,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:22:16,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 04:22:16,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:22:16,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 04:22:16,342 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:22:16,342 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:22:16,342 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:22:16,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 04:22:16,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:22:16,343 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:22:16,343 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:22:16,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:22:16,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:22:16,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:22:16,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:22:16,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 04:22:16,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:22:16,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 04:22:16,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 04:22:16,346 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_74addce6-9189-4449-a75d-3a2bc8140ad4/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 ! call(__VERIFIER_error())) ) 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 -> 573d04c3ab16ffed1ccac6c6179d92b670a825d7 [2019-11-20 04:22:16,562 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:22:16,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:22:16,592 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:22:16,594 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:22:16,595 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:22:16,596 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2019-11-20 04:22:16,670 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/data/4bae9d1e8/d36d26ae6497425e93f9fd693edd1bf3/FLAG119ce3c87 [2019-11-20 04:22:17,232 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:22:17,233 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2019-11-20 04:22:17,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/data/4bae9d1e8/d36d26ae6497425e93f9fd693edd1bf3/FLAG119ce3c87 [2019-11-20 04:22:17,448 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/data/4bae9d1e8/d36d26ae6497425e93f9fd693edd1bf3 [2019-11-20 04:22:17,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:22:17,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:22:17,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:22:17,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:22:17,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:22:17,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:22:17" (1/1) ... [2019-11-20 04:22:17,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545a30af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:17, skipping insertion in model container [2019-11-20 04:22:17,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:22:17" (1/1) ... [2019-11-20 04:22:17,475 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:22:17,554 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:22:18,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:22:18,121 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:22:18,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:22:18,264 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:22:18,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18 WrapperNode [2019-11-20 04:22:18,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:22:18,266 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:22:18,266 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:22:18,266 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:22:18,277 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:22:18,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:22:18,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:22:18,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:22:18,339 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,344 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... [2019-11-20 04:22:18,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:22:18,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:22:18,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:22:18,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:22:18,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:22:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 04:22:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 04:22:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 04:22:18,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 04:22:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 04:22:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:22:18,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:22:18,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:22:18,934 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:22:18,935 INFO L285 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-20 04:22:18,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:22:18 BoogieIcfgContainer [2019-11-20 04:22:18,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:22:18,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:22:18,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:22:18,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:22:18,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:22:17" (1/3) ... [2019-11-20 04:22:18,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512b9068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:22:18, skipping insertion in model container [2019-11-20 04:22:18,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:22:18" (2/3) ... [2019-11-20 04:22:18,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@512b9068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:22:18, skipping insertion in model container [2019-11-20 04:22:18,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:22:18" (3/3) ... [2019-11-20 04:22:18,948 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2019-11-20 04:22:18,960 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:22:18,968 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 04:22:18,983 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 04:22:19,011 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:22:19,012 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 04:22:19,012 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:22:19,012 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:22:19,012 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:22:19,012 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:22:19,012 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:22:19,012 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:22:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-20 04:22:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 04:22:19,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:19,039 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:19,040 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1957812527, now seen corresponding path program 1 times [2019-11-20 04:22:19,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:19,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166240375] [2019-11-20 04:22:19,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:19,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:19,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:19,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166240375] [2019-11-20 04:22:19,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:22:19,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-20 04:22:19,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429423758] [2019-11-20 04:22:19,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 04:22:19,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:19,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 04:22:19,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 04:22:19,229 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-20 04:22:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:19,251 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2019-11-20 04:22:19,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 04:22:19,253 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-11-20 04:22:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:19,264 INFO L225 Difference]: With dead ends: 48 [2019-11-20 04:22:19,264 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 04:22:19,267 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 04:22:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 04:22:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-20 04:22:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-20 04:22:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2019-11-20 04:22:19,307 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 12 [2019-11-20 04:22:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:19,307 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-20 04:22:19,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 04:22:19,308 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2019-11-20 04:22:19,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 04:22:19,309 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:19,309 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:19,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1580862863, now seen corresponding path program 1 times [2019-11-20 04:22:19,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:19,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537173893] [2019-11-20 04:22:19,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:19,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:19,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537173893] [2019-11-20 04:22:19,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:22:19,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 04:22:19,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577311206] [2019-11-20 04:22:19,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:22:19,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:19,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:22:19,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:22:19,371 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand 3 states. [2019-11-20 04:22:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:19,424 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2019-11-20 04:22:19,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:22:19,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 04:22:19,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:19,426 INFO L225 Difference]: With dead ends: 46 [2019-11-20 04:22:19,426 INFO L226 Difference]: Without dead ends: 31 [2019-11-20 04:22:19,427 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:22:19,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-20 04:22:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-11-20 04:22:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 04:22:19,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-20 04:22:19,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 12 [2019-11-20 04:22:19,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:19,435 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-20 04:22:19,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:22:19,435 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-20 04:22:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 04:22:19,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:19,436 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:19,437 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:19,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:19,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2031015874, now seen corresponding path program 1 times [2019-11-20 04:22:19,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:19,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784517461] [2019-11-20 04:22:19,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:19,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784517461] [2019-11-20 04:22:19,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361857870] [2019-11-20 04:22:19,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:19,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:19,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:22:19,710 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:22:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:19,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 04:22:19,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-20 04:22:19,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042911615] [2019-11-20 04:22:19,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:22:19,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:19,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:22:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:22:19,747 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2019-11-20 04:22:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:19,781 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2019-11-20 04:22:19,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:22:19,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-20 04:22:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:19,783 INFO L225 Difference]: With dead ends: 53 [2019-11-20 04:22:19,783 INFO L226 Difference]: Without dead ends: 31 [2019-11-20 04:22:19,784 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:22:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-20 04:22:19,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-20 04:22:19,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 04:22:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2019-11-20 04:22:19,790 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 19 [2019-11-20 04:22:19,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:19,790 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2019-11-20 04:22:19,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:22:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2019-11-20 04:22:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 04:22:19,792 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:19,792 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:19,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:19,998 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:19,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1772850436, now seen corresponding path program 1 times [2019-11-20 04:22:19,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:19,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686463126] [2019-11-20 04:22:19,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:20,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686463126] [2019-11-20 04:22:20,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197316964] [2019-11-20 04:22:20,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:20,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:22:20,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:22:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:20,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:22:20,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-20 04:22:20,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898401187] [2019-11-20 04:22:20,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:22:20,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:20,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:22:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:22:20,221 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 5 states. [2019-11-20 04:22:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:20,278 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2019-11-20 04:22:20,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 04:22:20,282 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-20 04:22:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:20,284 INFO L225 Difference]: With dead ends: 53 [2019-11-20 04:22:20,284 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 04:22:20,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:22:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 04:22:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2019-11-20 04:22:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 04:22:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2019-11-20 04:22:20,294 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 19 [2019-11-20 04:22:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:20,294 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2019-11-20 04:22:20,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:22:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2019-11-20 04:22:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 04:22:20,297 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:20,297 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:20,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:20,501 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:20,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:20,501 INFO L82 PathProgramCache]: Analyzing trace with hash -282378703, now seen corresponding path program 1 times [2019-11-20 04:22:20,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:20,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302982690] [2019-11-20 04:22:20,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:20,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:20,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302982690] [2019-11-20 04:22:20,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76375294] [2019-11-20 04:22:20,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:20,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 04:22:20,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:22:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:20,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:22:20,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-20 04:22:20,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477881480] [2019-11-20 04:22:20,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:22:20,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:20,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:22:20,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:22:20,789 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 6 states. [2019-11-20 04:22:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:20,846 INFO L93 Difference]: Finished difference Result 60 states and 81 transitions. [2019-11-20 04:22:20,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 04:22:20,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-20 04:22:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:20,849 INFO L225 Difference]: With dead ends: 60 [2019-11-20 04:22:20,849 INFO L226 Difference]: Without dead ends: 45 [2019-11-20 04:22:20,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:22:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-20 04:22:20,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2019-11-20 04:22:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 04:22:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2019-11-20 04:22:20,856 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 26 [2019-11-20 04:22:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:20,857 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2019-11-20 04:22:20,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:22:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2019-11-20 04:22:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 04:22:20,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:20,859 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:21,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:21,060 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:21,060 INFO L82 PathProgramCache]: Analyzing trace with hash 700996956, now seen corresponding path program 2 times [2019-11-20 04:22:21,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:21,061 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566598730] [2019-11-20 04:22:21,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:21,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566598730] [2019-11-20 04:22:21,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916620880] [2019-11-20 04:22:21,197 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:21,311 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:22:21,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:22:21,313 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:22:21,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:22:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:21,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:22:21,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-20 04:22:21,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455215724] [2019-11-20 04:22:21,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 04:22:21,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 04:22:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:22:21,346 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 7 states. [2019-11-20 04:22:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:21,415 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2019-11-20 04:22:21,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:22:21,416 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2019-11-20 04:22:21,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:21,418 INFO L225 Difference]: With dead ends: 67 [2019-11-20 04:22:21,418 INFO L226 Difference]: Without dead ends: 52 [2019-11-20 04:22:21,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:22:21,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-20 04:22:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2019-11-20 04:22:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-20 04:22:21,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2019-11-20 04:22:21,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2019-11-20 04:22:21,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:21,427 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2019-11-20 04:22:21,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 04:22:21,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2019-11-20 04:22:21,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-20 04:22:21,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:21,429 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:21,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:21,634 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:21,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -338892847, now seen corresponding path program 3 times [2019-11-20 04:22:21,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:21,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919915393] [2019-11-20 04:22:21,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:21,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919915393] [2019-11-20 04:22:21,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157314555] [2019-11-20 04:22:21,772 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:22,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 04:22:22,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:22:22,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-20 04:22:22,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:22:22,675 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,681 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2019-11-20 04:22:22,681 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:22,699 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:22,700 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:22,700 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2019-11-20 04:22:22,735 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_int_17|], 10=[|v_#memory_int_19|]} [2019-11-20 04:22:22,742 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:22:22,777 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:22,788 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,790 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,792 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,794 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,795 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,797 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,799 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,801 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,802 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,805 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,807 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:22,807 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2019-11-20 04:22:22,809 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:22,833 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:22,834 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:22,835 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2019-11-20 04:22:22,846 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,848 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,850 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:22:22,852 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:22,853 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2019-11-20 04:22:22,854 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:22,866 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:22,867 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:22,868 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2019-11-20 04:22:22,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:22:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-20 04:22:23,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 04:22:23,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2019-11-20 04:22:23,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777727952] [2019-11-20 04:22:23,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 04:22:23,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 04:22:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-11-20 04:22:23,023 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 11 states. [2019-11-20 04:22:23,658 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2019-11-20 04:22:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:23,745 INFO L93 Difference]: Finished difference Result 72 states and 98 transitions. [2019-11-20 04:22:23,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:22:23,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2019-11-20 04:22:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:23,747 INFO L225 Difference]: With dead ends: 72 [2019-11-20 04:22:23,748 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 04:22:23,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-20 04:22:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 04:22:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2019-11-20 04:22:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-20 04:22:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2019-11-20 04:22:23,756 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 40 [2019-11-20 04:22:23,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:23,757 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2019-11-20 04:22:23,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 04:22:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2019-11-20 04:22:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-20 04:22:23,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:23,759 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:23,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:23,966 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash -337045805, now seen corresponding path program 1 times [2019-11-20 04:22:23,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:23,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506481973] [2019-11-20 04:22:23,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:24,074 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506481973] [2019-11-20 04:22:24,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90595223] [2019-11-20 04:22:24,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:24,185 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 04:22:24,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:22:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:22:24,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:22:24,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 04:22:24,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443393595] [2019-11-20 04:22:24,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 04:22:24,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:24,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 04:22:24,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:22:24,205 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand 8 states. [2019-11-20 04:22:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:24,262 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2019-11-20 04:22:24,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:22:24,264 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-11-20 04:22:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:24,265 INFO L225 Difference]: With dead ends: 74 [2019-11-20 04:22:24,265 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 04:22:24,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:22:24,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 04:22:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-20 04:22:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-20 04:22:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2019-11-20 04:22:24,284 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 40 [2019-11-20 04:22:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:24,285 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-11-20 04:22:24,285 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 04:22:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2019-11-20 04:22:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 04:22:24,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:24,289 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:24,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:24,492 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:24,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2038353598, now seen corresponding path program 2 times [2019-11-20 04:22:24,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:24,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223913140] [2019-11-20 04:22:24,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:22:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 45 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-20 04:22:25,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223913140] [2019-11-20 04:22:25,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781554714] [2019-11-20 04:22:25,260 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:25,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:22:25,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:22:25,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-20 04:22:25,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:22:25,413 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 04:22:25,414 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,416 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:25,417 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,417 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:22:25,473 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:25,473 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-11-20 04:22:25,474 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,478 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:25,479 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,479 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2019-11-20 04:22:25,511 INFO L343 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2019-11-20 04:22:25,511 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2019-11-20 04:22:25,512 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,518 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:25,518 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,519 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:21 [2019-11-20 04:22:25,557 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_int_21|], 10=[|v_#memory_int_23|]} [2019-11-20 04:22:25,564 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:22:25,579 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:25,683 INFO L343 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2019-11-20 04:22:25,683 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 41 [2019-11-20 04:22:25,684 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,700 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:25,701 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,701 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:21 [2019-11-20 04:22:25,714 INFO L343 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2019-11-20 04:22:25,715 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2019-11-20 04:22:25,716 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,725 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:22:25,725 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:22:25,726 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:17 [2019-11-20 04:22:25,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:22:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-20 04:22:25,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:22:25,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2019-11-20 04:22:25,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235943373] [2019-11-20 04:22:25,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 04:22:25,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:22:25,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 04:22:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:22:25,893 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 20 states. [2019-11-20 04:22:26,912 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2019-11-20 04:22:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:22:27,123 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2019-11-20 04:22:27,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 04:22:27,123 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2019-11-20 04:22:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:22:27,124 INFO L225 Difference]: With dead ends: 86 [2019-11-20 04:22:27,124 INFO L226 Difference]: Without dead ends: 73 [2019-11-20 04:22:27,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2019-11-20 04:22:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-20 04:22:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2019-11-20 04:22:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-20 04:22:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2019-11-20 04:22:27,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 47 [2019-11-20 04:22:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:22:27,135 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2019-11-20 04:22:27,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 04:22:27,135 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2019-11-20 04:22:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 04:22:27,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:22:27,137 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:22:27,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:22:27,338 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:22:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:22:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2038355520, now seen corresponding path program 1 times [2019-11-20 04:22:27,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:22:27,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182054550] [2019-11-20 04:22:27,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:22:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:22:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:22:27,726 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:22:27,726 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 04:22:27,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:22:27 BoogieIcfgContainer [2019-11-20 04:22:27,799 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:22:27,799 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:22:27,799 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:22:27,800 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:22:27,800 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:22:18" (3/4) ... [2019-11-20 04:22:27,803 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 04:22:27,925 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_74addce6-9189-4449-a75d-3a2bc8140ad4/bin/uautomizer/witness.graphml [2019-11-20 04:22:27,925 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:22:27,927 INFO L168 Benchmark]: Toolchain (without parser) took 10474.02 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 304.6 MB). Free memory was 944.7 MB in the beginning and 1.3 GB in the end (delta: -312.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:22:27,927 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:22:27,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 810.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 04:22:27,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.43 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. [2019-11-20 04:22:27,929 INFO L168 Benchmark]: Boogie Preprocessor took 44.21 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. [2019-11-20 04:22:27,929 INFO L168 Benchmark]: RCFGBuilder took 568.67 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: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:22:27,930 INFO L168 Benchmark]: TraceAbstraction took 8859.30 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 132.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -147.1 MB). Peak memory consumption was 344.1 MB. Max. memory is 11.5 GB. [2019-11-20 04:22:27,930 INFO L168 Benchmark]: Witness Printer took 126.56 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 11.5 GB. [2019-11-20 04:22:27,932 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 810.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -204.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 59.43 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. * Boogie Preprocessor took 44.21 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 568.67 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: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8859.30 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 132.6 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -147.1 MB). Peak memory consumption was 344.1 MB. Max. memory is 11.5 GB. * Witness Printer took 126.56 ms. Allocated memory is still 1.3 GB. Free memory was 1.3 GB in the beginning and 1.3 GB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 605]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L588] const int len = 5; [L568] DLL head = ((void *)0); [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND FALSE !(\read(head)) [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND TRUE len > 0 [L570] DLL new_head = (DLL) malloc(sizeof(struct node)); [L571] COND FALSE !(((void *)0) == new_head) [L574] new_head->data_0 = 0 [L575] new_head->data_1 = 0 [L576] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L576] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L577] new_head->next = head [L578] new_head->prev = ((void *)0) [L579] COND TRUE \read(head) [L580] head->prev = new_head [L582] head = new_head [L583] len-- [L569] COND FALSE !(len > 0) [L585] return head; [L589] DLL head = dll_create(len); [L590] head->next [L590] COND TRUE head->next [L591] EXPR head->data_0 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] EXPR head->data_1 [L591] EXPR 0 != head->data_0 || 0 != head->data_1 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] EXPR head->data_2 [L591] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L591] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L605] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Result: UNSAFE, OverallTime: 8.7s, OverallIterations: 10, TraceHistogramMax: 5, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 250 SDtfs, 703 SDslu, 612 SDs, 0 SdLazy, 439 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 295 GetRequests, 222 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=9, 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, 9 MinimizatonAttempts, 50 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 519 NumberOfCodeBlocks, 512 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 456 ConstructedInterpolants, 0 QuantifiedInterpolants, 54239 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1065 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 184/404 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...