./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/stateful_check.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/stateful_check.c -s /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/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 1225f82562543767c482452e9133e4a69d5dae70 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 17:15:10,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 17:15:10,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 17:15:10,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 17:15:10,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 17:15:10,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 17:15:10,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 17:15:10,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 17:15:10,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 17:15:10,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 17:15:10,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 17:15:10,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 17:15:10,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 17:15:10,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 17:15:10,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 17:15:10,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 17:15:10,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 17:15:10,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 17:15:10,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 17:15:10,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 17:15:10,252 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 17:15:10,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 17:15:10,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 17:15:10,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 17:15:10,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 17:15:10,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 17:15:10,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 17:15:10,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 17:15:10,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 17:15:10,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 17:15:10,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 17:15:10,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 17:15:10,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 17:15:10,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 17:15:10,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 17:15:10,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 17:15:10,259 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 17:15:10,259 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 17:15:10,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 17:15:10,260 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 17:15:10,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 17:15:10,261 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 17:15:10,269 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 17:15:10,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 17:15:10,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 17:15:10,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 17:15:10,270 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 17:15:10,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 17:15:10,271 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 17:15:10,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 17:15:10,272 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 17:15:10,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 17:15:10,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 17:15:10,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 17:15:10,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 17:15:10,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 17:15:10,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 17:15:10,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 17:15:10,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 17:15:10,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 17:15:10,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 17:15:10,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 17:15:10,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 17:15:10,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 17:15:10,273 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_69837757-625d-4993-8e7e-14a87d137bc3/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 -> 1225f82562543767c482452e9133e4a69d5dae70 [2019-12-07 17:15:10,374 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 17:15:10,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 17:15:10,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 17:15:10,386 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 17:15:10,386 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 17:15:10,386 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/stateful_check.c [2019-12-07 17:15:10,422 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/data/d85693434/f300b1b66157493b96e59ef4b9f11396/FLAG8de8abe6f [2019-12-07 17:15:10,750 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 17:15:10,750 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/sv-benchmarks/c/ldv-regression/stateful_check.c [2019-12-07 17:15:10,755 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/data/d85693434/f300b1b66157493b96e59ef4b9f11396/FLAG8de8abe6f [2019-12-07 17:15:10,763 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/data/d85693434/f300b1b66157493b96e59ef4b9f11396 [2019-12-07 17:15:10,765 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 17:15:10,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 17:15:10,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 17:15:10,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 17:15:10,769 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 17:15:10,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c78915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10, skipping insertion in model container [2019-12-07 17:15:10,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 17:15:10,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 17:15:10,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:15:10,936 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 17:15:10,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 17:15:10,959 INFO L208 MainTranslator]: Completed translation [2019-12-07 17:15:10,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10 WrapperNode [2019-12-07 17:15:10,960 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 17:15:10,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 17:15:10,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 17:15:10,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 17:15:10,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 17:15:10,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 17:15:10,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 17:15:10,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 17:15:10,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... [2019-12-07 17:15:10,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 17:15:10,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 17:15:10,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 17:15:10,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 17:15:10,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/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 [2019-12-07 17:15:11,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 17:15:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 17:15:11,189 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 17:15:11,190 INFO L287 CfgBuilder]: Removed 35 assume(true) statements. [2019-12-07 17:15:11,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:11 BoogieIcfgContainer [2019-12-07 17:15:11,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 17:15:11,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 17:15:11,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 17:15:11,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 17:15:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 05:15:10" (1/3) ... [2019-12-07 17:15:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa72bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:15:11, skipping insertion in model container [2019-12-07 17:15:11,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 05:15:10" (2/3) ... [2019-12-07 17:15:11,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fa72bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 05:15:11, skipping insertion in model container [2019-12-07 17:15:11,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:11" (3/3) ... [2019-12-07 17:15:11,196 INFO L109 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2019-12-07 17:15:11,202 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 17:15:11,206 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-12-07 17:15:11,213 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-12-07 17:15:11,232 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 17:15:11,232 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 17:15:11,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 17:15:11,232 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 17:15:11,232 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 17:15:11,232 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 17:15:11,232 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 17:15:11,232 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 17:15:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2019-12-07 17:15:11,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-12-07 17:15:11,246 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:11,247 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-12-07 17:15:11,247 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:11,251 INFO L82 PathProgramCache]: Analyzing trace with hash 889605129, now seen corresponding path program 1 times [2019-12-07 17:15:11,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:11,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052711443] [2019-12-07 17:15:11,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:11,334 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052711443] [2019-12-07 17:15:11,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:11,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:15:11,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917590327] [2019-12-07 17:15:11,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 17:15:11,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:11,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 17:15:11,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 17:15:11,349 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2019-12-07 17:15:11,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:11,363 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2019-12-07 17:15:11,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 17:15:11,364 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-12-07 17:15:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:11,370 INFO L225 Difference]: With dead ends: 89 [2019-12-07 17:15:11,371 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 17:15:11,373 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 [2019-12-07 17:15:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 17:15:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-07 17:15:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-07 17:15:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-12-07 17:15:11,396 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 6 [2019-12-07 17:15:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:11,397 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-12-07 17:15:11,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 17:15:11,397 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-12-07 17:15:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 17:15:11,397 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:11,398 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:11,398 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:11,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1804046918, now seen corresponding path program 1 times [2019-12-07 17:15:11,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:11,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646938622] [2019-12-07 17:15:11,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:11,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646938622] [2019-12-07 17:15:11,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:11,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 17:15:11,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983440504] [2019-12-07 17:15:11,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:15:11,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:11,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:15:11,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:15:11,429 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 3 states. [2019-12-07 17:15:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:11,458 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2019-12-07 17:15:11,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:15:11,458 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 17:15:11,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:11,459 INFO L225 Difference]: With dead ends: 70 [2019-12-07 17:15:11,459 INFO L226 Difference]: Without dead ends: 63 [2019-12-07 17:15:11,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:15:11,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-07 17:15:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-12-07 17:15:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-12-07 17:15:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2019-12-07 17:15:11,467 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 7 [2019-12-07 17:15:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:11,467 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2019-12-07 17:15:11,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:15:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2019-12-07 17:15:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 17:15:11,468 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:11,468 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:11,468 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash -147365405, now seen corresponding path program 1 times [2019-12-07 17:15:11,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:11,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661566340] [2019-12-07 17:15:11,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:11,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661566340] [2019-12-07 17:15:11,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:11,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:15:11,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415808673] [2019-12-07 17:15:11,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:15:11,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:11,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:15:11,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:15:11,493 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 3 states. [2019-12-07 17:15:11,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:11,522 INFO L93 Difference]: Finished difference Result 150 states and 212 transitions. [2019-12-07 17:15:11,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:15:11,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-12-07 17:15:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:11,523 INFO L225 Difference]: With dead ends: 150 [2019-12-07 17:15:11,523 INFO L226 Difference]: Without dead ends: 90 [2019-12-07 17:15:11,524 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 [2019-12-07 17:15:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-07 17:15:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-12-07 17:15:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-12-07 17:15:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2019-12-07 17:15:11,532 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 15 [2019-12-07 17:15:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:11,532 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2019-12-07 17:15:11,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:15:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2019-12-07 17:15:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 17:15:11,533 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:11,533 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:11,533 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:11,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1293798555, now seen corresponding path program 1 times [2019-12-07 17:15:11,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:11,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048660] [2019-12-07 17:15:11,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 17:15:11,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048660] [2019-12-07 17:15:11,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:11,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 17:15:11,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164060687] [2019-12-07 17:15:11,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 17:15:11,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:11,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 17:15:11,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 17:15:11,563 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 3 states. [2019-12-07 17:15:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:11,579 INFO L93 Difference]: Finished difference Result 208 states and 300 transitions. [2019-12-07 17:15:11,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 17:15:11,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-12-07 17:15:11,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:11,580 INFO L225 Difference]: With dead ends: 208 [2019-12-07 17:15:11,580 INFO L226 Difference]: Without dead ends: 124 [2019-12-07 17:15:11,581 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 [2019-12-07 17:15:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-12-07 17:15:11,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2019-12-07 17:15:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-12-07 17:15:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 177 transitions. [2019-12-07 17:15:11,591 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 177 transitions. Word has length 22 [2019-12-07 17:15:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:11,591 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 177 transitions. [2019-12-07 17:15:11,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 17:15:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 177 transitions. [2019-12-07 17:15:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-07 17:15:11,592 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:11,592 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:11,592 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1319564790, now seen corresponding path program 1 times [2019-12-07 17:15:11,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:11,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027462338] [2019-12-07 17:15:11,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:11,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:11,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027462338] [2019-12-07 17:15:11,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245546284] [2019-12-07 17:15:11,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/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 [2019-12-07 17:15:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:11,651 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 17:15:11,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 17:15:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 17:15:11,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 17:15:11,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-12-07 17:15:11,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926571023] [2019-12-07 17:15:11,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 17:15:11,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 17:15:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:15:11,668 INFO L87 Difference]: Start difference. First operand 121 states and 177 transitions. Second operand 5 states. [2019-12-07 17:15:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:11,717 INFO L93 Difference]: Finished difference Result 344 states and 529 transitions. [2019-12-07 17:15:11,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 17:15:11,717 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-12-07 17:15:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:11,719 INFO L225 Difference]: With dead ends: 344 [2019-12-07 17:15:11,719 INFO L226 Difference]: Without dead ends: 226 [2019-12-07 17:15:11,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-07 17:15:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-12-07 17:15:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2019-12-07 17:15:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-12-07 17:15:11,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 327 transitions. [2019-12-07 17:15:11,734 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 327 transitions. Word has length 22 [2019-12-07 17:15:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:11,734 INFO L462 AbstractCegarLoop]: Abstraction has 217 states and 327 transitions. [2019-12-07 17:15:11,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 17:15:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 327 transitions. [2019-12-07 17:15:11,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-07 17:15:11,735 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:11,735 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:11,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 17:15:11,937 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:11,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1040975168, now seen corresponding path program 1 times [2019-12-07 17:15:11,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:11,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587829431] [2019-12-07 17:15:11,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 17:15:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-12-07 17:15:11,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587829431] [2019-12-07 17:15:11,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 17:15:11,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 17:15:11,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524601777] [2019-12-07 17:15:11,998 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 17:15:11,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 17:15:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 17:15:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:15:11,999 INFO L87 Difference]: Start difference. First operand 217 states and 327 transitions. Second operand 4 states. [2019-12-07 17:15:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 17:15:12,078 INFO L93 Difference]: Finished difference Result 629 states and 979 transitions. [2019-12-07 17:15:12,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 17:15:12,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-12-07 17:15:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 17:15:12,083 INFO L225 Difference]: With dead ends: 629 [2019-12-07 17:15:12,084 INFO L226 Difference]: Without dead ends: 415 [2019-12-07 17:15:12,086 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-07 17:15:12,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2019-12-07 17:15:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 313. [2019-12-07 17:15:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2019-12-07 17:15:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 487 transitions. [2019-12-07 17:15:12,108 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 487 transitions. Word has length 29 [2019-12-07 17:15:12,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 17:15:12,108 INFO L462 AbstractCegarLoop]: Abstraction has 313 states and 487 transitions. [2019-12-07 17:15:12,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 17:15:12,109 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 487 transitions. [2019-12-07 17:15:12,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-07 17:15:12,110 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 17:15:12,110 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 17:15:12,111 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 17:15:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 17:15:12,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1446791270, now seen corresponding path program 1 times [2019-12-07 17:15:12,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 17:15:12,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669660085] [2019-12-07 17:15:12,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 17:15:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:15:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 17:15:12,144 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 17:15:12,144 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 17:15:12,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 05:15:12 BoogieIcfgContainer [2019-12-07 17:15:12,167 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 17:15:12,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 17:15:12,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 17:15:12,167 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 17:15:12,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 05:15:11" (3/4) ... [2019-12-07 17:15:12,169 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 17:15:12,205 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_69837757-625d-4993-8e7e-14a87d137bc3/bin/uautomizer/witness.graphml [2019-12-07 17:15:12,205 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 17:15:12,206 INFO L168 Benchmark]: Toolchain (without parser) took 1439.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 941.5 MB in the beginning and 987.2 MB in the end (delta: -45.7 MB). Peak memory consumption was 73.8 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:12,207 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 957.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 17:15:12,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -171.7 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:12,207 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.66 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:12,207 INFO L168 Benchmark]: Boogie Preprocessor took 14.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:12,208 INFO L168 Benchmark]: RCFGBuilder took 192.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:12,208 INFO L168 Benchmark]: TraceAbstraction took 975.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 990.4 MB in the end (delta: 96.5 MB). Peak memory consumption was 96.5 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:12,208 INFO L168 Benchmark]: Witness Printer took 37.60 ms. Allocated memory is still 1.1 GB. Free memory was 990.4 MB in the beginning and 987.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. [2019-12-07 17:15:12,210 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 957.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 192.87 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 940.4 MB in the beginning and 1.1 GB in the end (delta: -171.7 MB). Peak memory consumption was 20.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.66 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 14.65 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 192.00 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 975.62 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 990.4 MB in the end (delta: 96.5 MB). Peak memory consumption was 96.5 MB. Max. memory is 11.5 GB. * Witness Printer took 37.60 ms. Allocated memory is still 1.1 GB. Free memory was 990.4 MB in the beginning and 987.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] int ldv_mutex = 1; [L11] int open_called = 0; VAL [ldv_mutex=1, open_called=0] [L74] int ldv_s_misc_fops_file_operations = 0; [L69] open_called = 0 [L70] return 0; VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: VAL [ldv_mutex=1, open_called=0] [L81] COND TRUE ldv_s_misc_fops_file_operations==0 [L57] COND TRUE __VERIFIER_nondet_int() [L59] return 1; VAL [ldv_mutex=1, open_called=0] [L83] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: VAL [ldv_mutex=1, open_called=0] [L89] COND TRUE ldv_s_misc_fops_file_operations==1 [L52] return 0; VAL [ldv_mutex=1, open_called=0] [L91] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: VAL [ldv_mutex=1, open_called=0] [L97] COND TRUE ldv_s_misc_fops_file_operations==2 [L48] return 0; VAL [ldv_mutex=1, open_called=0] [L99] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L76] COND TRUE __VERIFIER_nondet_int() [L80] case 0: [L88] case 1: [L96] case 2: [L104] case 3: VAL [ldv_mutex=1, open_called=0] [L105] COND TRUE ldv_s_misc_fops_file_operations==3 [L34] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=1, open_called=0] [L17] ldv_mutex = 2 VAL [ldv_mutex=2, open_called=0] [L16] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=2, open_called=0] [L4] __VERIFIER_error() VAL [ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 5 error locations. Result: UNSAFE, OverallTime: 0.9s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 297 SDtfs, 164 SDslu, 310 SDs, 0 SdLazy, 98 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=313occurred in iteration=6, 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, 6 MinimizatonAttempts, 117 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 5084 SizeOfPredicates, 1 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 14/20 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...