./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/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 3aee1e8d9b723b18f218b6c1185554e637930c5d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-25 08:46:09,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:46:09,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:46:09,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:46:09,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:46:09,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:46:09,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:46:09,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:46:09,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:46:09,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:46:09,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:46:09,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:46:09,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:46:09,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:46:09,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:46:09,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:46:09,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:46:09,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:46:09,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:46:09,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:46:09,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:46:09,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:46:09,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:46:09,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:46:09,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:46:09,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:46:09,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:46:09,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:46:09,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:46:09,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:46:09,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:46:09,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:46:09,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:46:09,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:46:09,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:46:09,247 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:46:09,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:46:09,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:46:09,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:46:09,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:46:09,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:46:09,250 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:46:09,274 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:46:09,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:46:09,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:46:09,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:46:09,276 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:46:09,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:46:09,276 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:46:09,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:46:09,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:46:09,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:46:09,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:46:09,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:46:09,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:46:09,277 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:46:09,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:46:09,278 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:46:09,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:46:09,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:46:09,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:46:09,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:46:09,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:46:09,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:46:09,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:46:09,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:46:09,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:46:09,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:46:09,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:46:09,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:46:09,280 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_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/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 -> 3aee1e8d9b723b18f218b6c1185554e637930c5d [2019-11-25 08:46:09,417 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:46:09,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:46:09,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:46:09,432 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:46:09,432 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:46:09,433 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2019-11-25 08:46:09,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/data/ca605fb1c/d246db8e94da4be283ccd5830e95fc25/FLAG8f9c68271 [2019-11-25 08:46:09,911 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:46:09,912 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2019-11-25 08:46:09,921 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/data/ca605fb1c/d246db8e94da4be283ccd5830e95fc25/FLAG8f9c68271 [2019-11-25 08:46:10,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/data/ca605fb1c/d246db8e94da4be283ccd5830e95fc25 [2019-11-25 08:46:10,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:46:10,213 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:46:10,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:10,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:46:10,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:46:10,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@465b102a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10, skipping insertion in model container [2019-11-25 08:46:10,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:46:10,275 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:46:10,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:10,625 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:46:10,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:10,732 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:46:10,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10 WrapperNode [2019-11-25 08:46:10,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:10,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:10,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:46:10,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:46:10,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:10,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:46:10,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:46:10,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:46:10,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,826 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,835 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... [2019-11-25 08:46:10,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:46:10,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:46:10,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:46:10,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:46:10,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/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 [2019-11-25 08:46:10,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:46:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:46:10,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:46:10,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:46:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:46:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:46:10,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:46:10,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:46:11,382 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:46:11,382 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-25 08:46:11,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:11 BoogieIcfgContainer [2019-11-25 08:46:11,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:46:11,385 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:46:11,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:46:11,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:46:11,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:46:10" (1/3) ... [2019-11-25 08:46:11,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592fb64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:11, skipping insertion in model container [2019-11-25 08:46:11,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:10" (2/3) ... [2019-11-25 08:46:11,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592fb64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:11, skipping insertion in model container [2019-11-25 08:46:11,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:11" (3/3) ... [2019-11-25 08:46:11,392 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2019-11-25 08:46:11,402 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:46:11,408 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-25 08:46:11,420 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-25 08:46:11,441 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:46:11,442 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:46:11,442 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:46:11,442 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:46:11,442 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:46:11,442 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:46:11,442 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:46:11,443 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:46:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-25 08:46:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-25 08:46:11,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:11,462 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-25 08:46:11,463 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash 889968582, now seen corresponding path program 1 times [2019-11-25 08:46:11,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:11,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965618495] [2019-11-25 08:46:11,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:11,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965618495] [2019-11-25 08:46:11,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:11,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:46:11,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739599099] [2019-11-25 08:46:11,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:46:11,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:11,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:46:11,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:46:11,631 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-25 08:46:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:11,647 INFO L93 Difference]: Finished difference Result 53 states and 84 transitions. [2019-11-25 08:46:11,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:46:11,649 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-25 08:46:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:11,657 INFO L225 Difference]: With dead ends: 53 [2019-11-25 08:46:11,657 INFO L226 Difference]: Without dead ends: 23 [2019-11-25 08:46:11,660 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 [2019-11-25 08:46:11,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-25 08:46:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-25 08:46:11,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-25 08:46:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-25 08:46:11,689 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 6 [2019-11-25 08:46:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:11,689 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-25 08:46:11,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:46:11,689 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-25 08:46:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-25 08:46:11,690 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:11,690 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:11,691 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1806853233, now seen corresponding path program 1 times [2019-11-25 08:46:11,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:11,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489494773] [2019-11-25 08:46:11,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:11,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489494773] [2019-11-25 08:46:11,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:11,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:46:11,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603277326] [2019-11-25 08:46:11,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:46:11,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:46:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:46:11,752 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-11-25 08:46:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:11,829 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-11-25 08:46:11,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:46:11,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-25 08:46:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:11,830 INFO L225 Difference]: With dead ends: 31 [2019-11-25 08:46:11,831 INFO L226 Difference]: Without dead ends: 29 [2019-11-25 08:46:11,831 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:46:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-25 08:46:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2019-11-25 08:46:11,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-25 08:46:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-25 08:46:11,835 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2019-11-25 08:46:11,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:11,836 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-25 08:46:11,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:46:11,836 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-25 08:46:11,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:46:11,836 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:11,837 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:11,838 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:11,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:11,839 INFO L82 PathProgramCache]: Analyzing trace with hash -856511048, now seen corresponding path program 1 times [2019-11-25 08:46:11,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:11,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73611577] [2019-11-25 08:46:11,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:11,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73611577] [2019-11-25 08:46:11,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:11,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:46:11,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777636149] [2019-11-25 08:46:11,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:46:11,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:11,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:46:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:46:11,966 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2019-11-25 08:46:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:12,086 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-25 08:46:12,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:46:12,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-25 08:46:12,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:12,088 INFO L225 Difference]: With dead ends: 47 [2019-11-25 08:46:12,088 INFO L226 Difference]: Without dead ends: 45 [2019-11-25 08:46:12,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:46:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-25 08:46:12,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2019-11-25 08:46:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:46:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-25 08:46:12,094 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2019-11-25 08:46:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:12,094 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-25 08:46:12,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:46:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-25 08:46:12,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:46:12,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:12,095 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:12,095 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:12,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:12,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1594081566, now seen corresponding path program 1 times [2019-11-25 08:46:12,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:12,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661789815] [2019-11-25 08:46:12,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:12,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661789815] [2019-11-25 08:46:12,314 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601856274] [2019-11-25 08:46:12,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/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 [2019-11-25 08:46:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:12,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-25 08:46:12,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:46:12,449 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 [2019-11-25 08:46:12,449 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,470 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,475 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 [2019-11-25 08:46:12,475 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,486 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,486 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,487 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2019-11-25 08:46:12,538 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,538 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-11-25 08:46:12,539 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,596 INFO L567 ElimStorePlain]: treesize reduction 14, result has 80.3 percent of original size [2019-11-25 08:46:12,607 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:46:12,638 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,647 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:46:12,651 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2019-11-25 08:46:12,651 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,666 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,667 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,667 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:59, output treesize:27 [2019-11-25 08:46:12,742 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,742 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2019-11-25 08:46:12,743 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,791 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,794 INFO L392 ElimStorePlain]: Different costs {2=[|v_#memory_int_23|, |v_#memory_int_24|], 4=[|v_#memory_int_26|]} [2019-11-25 08:46:12,806 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:46:12,842 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,848 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-25 08:46:12,873 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,882 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-25 08:46:12,912 INFO L343 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2019-11-25 08:46:12,912 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2019-11-25 08:46:12,913 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-25 08:46:12,945 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:12,947 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-25 08:46:12,947 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:80, output treesize:43 [2019-11-25 08:46:13,046 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2019-11-25 08:46:13,047 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:46:13,058 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:46:13,059 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:46:13,059 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2019-11-25 08:46:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:13,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:46:13,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2019-11-25 08:46:13,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931887923] [2019-11-25 08:46:13,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:46:13,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:46:13,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:46:13,065 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 11 states. [2019-11-25 08:46:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:13,568 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2019-11-25 08:46:13,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:46:13,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2019-11-25 08:46:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:13,570 INFO L225 Difference]: With dead ends: 60 [2019-11-25 08:46:13,570 INFO L226 Difference]: Without dead ends: 58 [2019-11-25 08:46:13,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:46:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-25 08:46:13,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 19. [2019-11-25 08:46:13,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-25 08:46:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-25 08:46:13,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2019-11-25 08:46:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:13,580 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-25 08:46:13,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:46:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-25 08:46:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:46:13,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:13,582 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:13,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:46:13,783 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:13,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:13,783 INFO L82 PathProgramCache]: Analyzing trace with hash -839217458, now seen corresponding path program 1 times [2019-11-25 08:46:13,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:13,784 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902721312] [2019-11-25 08:46:13,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:46:13,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902721312] [2019-11-25 08:46:13,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:13,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:46:13,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14446228] [2019-11-25 08:46:13,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:46:13,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:13,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:46:13,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:46:13,928 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2019-11-25 08:46:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:14,021 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-25 08:46:14,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:46:14,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-25 08:46:14,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:14,024 INFO L225 Difference]: With dead ends: 35 [2019-11-25 08:46:14,024 INFO L226 Difference]: Without dead ends: 27 [2019-11-25 08:46:14,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:46:14,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-25 08:46:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-11-25 08:46:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-25 08:46:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-25 08:46:14,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2019-11-25 08:46:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:14,028 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-25 08:46:14,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:46:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-25 08:46:14,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:46:14,029 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:14,029 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:14,030 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:14,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:14,030 INFO L82 PathProgramCache]: Analyzing trace with hash -839157876, now seen corresponding path program 1 times [2019-11-25 08:46:14,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:14,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942996119] [2019-11-25 08:46:14,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:14,067 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:46:14,067 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:46:14,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:46:14 BoogieIcfgContainer [2019-11-25 08:46:14,091 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:46:14,092 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:46:14,092 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:46:14,092 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:46:14,093 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:11" (3/4) ... [2019-11-25 08:46:14,095 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:46:14,138 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a2c79906-3a85-4b8b-8d12-c7b40fcaca24/bin/uautomizer/witness.graphml [2019-11-25 08:46:14,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:46:14,140 INFO L168 Benchmark]: Toolchain (without parser) took 3926.61 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 939.3 MB in the beginning and 884.1 MB in the end (delta: 55.2 MB). Peak memory consumption was 212.5 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:14,140 INFO L168 Benchmark]: CDTParser took 0.19 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. [2019-11-25 08:46:14,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 518.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -195.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:14,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.05 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. [2019-11-25 08:46:14,142 INFO L168 Benchmark]: Boogie Preprocessor took 72.96 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. [2019-11-25 08:46:14,142 INFO L168 Benchmark]: RCFGBuilder took 514.11 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: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:14,143 INFO L168 Benchmark]: TraceAbstraction took 2706.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 884.1 MB in the end (delta: 221.6 MB). Peak memory consumption was 221.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:14,143 INFO L168 Benchmark]: Witness Printer took 46.69 ms. Allocated memory is still 1.2 GB. Free memory is still 884.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:46:14,145 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 518.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -195.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 63.05 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 72.96 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 514.11 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: 28.8 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2706.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 884.1 MB in the end (delta: 221.6 MB). Peak memory consumption was 221.6 MB. Max. memory is 11.5 GB. * Witness Printer took 46.69 ms. Allocated memory is still 1.2 GB. Free memory is still 884.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1038]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L995] SLL* list = malloc(sizeof(SLL)); [L996] list->next = ((void*)0) [L997] list->colour = BLACK [L999] SLL* end = list; [L1002] COND FALSE !(__VERIFIER_nondet_int()) [L1023] end = ((void*)0) [L1024] end = list [L1027] COND FALSE !(!(((void*)0) != end)) [L1028] EXPR end->colour [L1028] COND FALSE !(!(BLACK == end->colour)) [L1030] COND TRUE ((void*)0) != end [L1032] EXPR end->colour [L1032] COND FALSE !(RED == end->colour) [L1038] EXPR end->next [L1038] COND TRUE !(end->next) [L1038] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 3 error locations. Result: UNSAFE, OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 152 SDslu, 203 SDs, 0 SdLazy, 205 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 5 MinimizatonAttempts, 70 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 58 ConstructedInterpolants, 6 QuantifiedInterpolants, 7236 SizeOfPredicates, 11 NumberOfNonLiveVariables, 84 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 0/4 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...