/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 03:56:26,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 03:56:26,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 03:56:26,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 03:56:26,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 03:56:26,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 03:56:26,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 03:56:26,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 03:56:26,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 03:56:26,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 03:56:26,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 03:56:26,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 03:56:26,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 03:56:26,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 03:56:26,354 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 03:56:26,355 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 03:56:26,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 03:56:26,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 03:56:26,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 03:56:26,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 03:56:26,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 03:56:26,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 03:56:26,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 03:56:26,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 03:56:26,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 03:56:26,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 03:56:26,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 03:56:26,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 03:56:26,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 03:56:26,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 03:56:26,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 03:56:26,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 03:56:26,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 03:56:26,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 03:56:26,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 03:56:26,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 03:56:26,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 03:56:26,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 03:56:26,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 03:56:26,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 03:56:26,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 03:56:26,422 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 03:56:26,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 03:56:26,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 03:56:26,455 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 03:56:26,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 03:56:26,455 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 03:56:26,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 03:56:26,455 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 03:56:26,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 03:56:26,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 03:56:26,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 03:56:26,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 03:56:26,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 03:56:26,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 03:56:26,458 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 03:56:26,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 03:56:26,459 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 03:56:26,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 03:56:26,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 03:56:26,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 03:56:26,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 03:56:26,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 03:56:26,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 03:56:26,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 03:56:26,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 03:56:26,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 03:56:26,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 03:56:26,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 03:56:26,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 03:56:26,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 03:56:26,462 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 03:56:26,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 03:56:26,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 03:56:26,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 03:56:26,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 03:56:26,922 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 03:56:26,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-27 03:56:26,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c82a41489/c53a40ef4335443d8d94d9d15527a42c/FLAG819807928 [2020-10-27 03:56:27,480 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 03:56:27,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2020-10-27 03:56:27,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c82a41489/c53a40ef4335443d8d94d9d15527a42c/FLAG819807928 [2020-10-27 03:56:27,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c82a41489/c53a40ef4335443d8d94d9d15527a42c [2020-10-27 03:56:27,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 03:56:27,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 03:56:27,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 03:56:27,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 03:56:27,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 03:56:27,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:56:27" (1/1) ... [2020-10-27 03:56:27,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ddcd2fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:27, skipping insertion in model container [2020-10-27 03:56:27,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:56:27" (1/1) ... [2020-10-27 03:56:27,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 03:56:27,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 03:56:28,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 03:56:28,071 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 03:56:28,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 03:56:28,109 INFO L208 MainTranslator]: Completed translation [2020-10-27 03:56:28,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28 WrapperNode [2020-10-27 03:56:28,110 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 03:56:28,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 03:56:28,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 03:56:28,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 03:56:28,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... [2020-10-27 03:56:28,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... [2020-10-27 03:56:28,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... [2020-10-27 03:56:28,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... [2020-10-27 03:56:28,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... [2020-10-27 03:56:28,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... [2020-10-27 03:56:28,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... [2020-10-27 03:56:28,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 03:56:28,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 03:56:28,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 03:56:28,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 03:56:28,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/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 [2020-10-27 03:56:28,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 03:56:28,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 03:56:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 03:56:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2020-10-27 03:56:28,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 03:56:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 03:56:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 03:56:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 03:56:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 03:56:28,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 03:56:28,262 INFO L130 BoogieDeclarations]: Found specification of procedure A [2020-10-27 03:56:28,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 03:56:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 03:56:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 03:56:28,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 03:56:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 03:56:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 03:56:28,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 03:56:28,514 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 03:56:28,515 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 03:56:28,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:56:28 BoogieIcfgContainer [2020-10-27 03:56:28,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 03:56:28,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 03:56:28,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 03:56:28,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 03:56:28,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:56:27" (1/3) ... [2020-10-27 03:56:28,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450f8662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:56:28, skipping insertion in model container [2020-10-27 03:56:28,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:56:28" (2/3) ... [2020-10-27 03:56:28,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@450f8662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:56:28, skipping insertion in model container [2020-10-27 03:56:28,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:56:28" (3/3) ... [2020-10-27 03:56:28,526 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2020-10-27 03:56:28,555 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 03:56:28,568 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 03:56:28,603 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 03:56:28,645 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 03:56:28,645 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 03:56:28,646 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 03:56:28,646 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 03:56:28,646 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 03:56:28,646 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 03:56:28,646 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 03:56:28,647 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 03:56:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-27 03:56:28,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 03:56:28,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:56:28,678 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:56:28,679 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:56:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:56:28,686 INFO L82 PathProgramCache]: Analyzing trace with hash 394687314, now seen corresponding path program 1 times [2020-10-27 03:56:28,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:56:28,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297204351] [2020-10-27 03:56:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:56:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:28,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:28,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:29,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:29,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 03:56:29,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 03:56:29,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 831 [2020-10-27 03:56:29,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 03:56:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 03:56:29,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 03:56:29,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 03:56:29,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 03:56:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:29,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:29,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:29,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 03:56:29,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:56:29,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 03:56:29,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:29,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 03:56:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:56:29,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 03:56:29,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 03:56:29,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 03:56:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:29,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:29,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:29,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 03:56:29,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 03:56:29,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 03:56:29,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 03:56:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:56:29,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 03:56:29,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 03:56:29,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-27 03:56:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 03:56:29,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:29,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 03:56:29,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 03:56:29,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 03:56:29,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 03:56:29,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 03:56:29,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 03:56:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 03:56:29,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 03:56:29,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 03:56:29,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 03:56:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 03:56:29,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297204351] [2020-10-27 03:56:29,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 03:56:29,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 03:56:29,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254841385] [2020-10-27 03:56:29,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 03:56:29,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 03:56:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 03:56:29,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 03:56:29,936 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 7 states. [2020-10-27 03:56:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 03:56:30,246 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-10-27 03:56:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 03:56:30,248 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 03:56:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 03:56:30,257 INFO L225 Difference]: With dead ends: 50 [2020-10-27 03:56:30,257 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 03:56:30,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 03:56:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 03:56:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-27 03:56:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 03:56:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-27 03:56:30,308 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 21 [2020-10-27 03:56:30,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 03:56:30,308 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-27 03:56:30,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 03:56:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-27 03:56:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 03:56:30,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 03:56:30,311 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 03:56:30,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 03:56:30,312 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 03:56:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 03:56:30,313 INFO L82 PathProgramCache]: Analyzing trace with hash 208947422, now seen corresponding path program 1 times [2020-10-27 03:56:30,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 03:56:30,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081462790] [2020-10-27 03:56:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 03:56:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 03:56:30,335 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 03:56:30,335 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 03:56:30,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 03:56:30,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 03:56:30 BoogieIcfgContainer [2020-10-27 03:56:30,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 03:56:30,359 INFO L168 Benchmark]: Toolchain (without parser) took 2493.08 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 107.2 MB in the beginning and 79.8 MB in the end (delta: 27.4 MB). Peak memory consumption was 57.8 MB. Max. memory is 8.0 GB. [2020-10-27 03:56:30,360 INFO L168 Benchmark]: CDTParser took 0.50 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 03:56:30,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 239.64 ms. Allocated memory is still 151.0 MB. Free memory was 106.5 MB in the beginning and 132.8 MB in the end (delta: -26.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. [2020-10-27 03:56:30,362 INFO L168 Benchmark]: Boogie Preprocessor took 28.17 ms. Allocated memory is still 151.0 MB. Free memory was 132.8 MB in the beginning and 131.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-27 03:56:30,363 INFO L168 Benchmark]: RCFGBuilder took 376.77 ms. Allocated memory is still 151.0 MB. Free memory was 131.6 MB in the beginning and 121.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2020-10-27 03:56:30,364 INFO L168 Benchmark]: TraceAbstraction took 1837.97 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 121.3 MB in the beginning and 79.8 MB in the end (delta: 41.6 MB). Peak memory consumption was 71.5 MB. Max. memory is 8.0 GB. [2020-10-27 03:56:30,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50 ms. Allocated memory is still 151.0 MB. Free memory is still 123.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 239.64 ms. Allocated memory is still 151.0 MB. Free memory was 106.5 MB in the beginning and 132.8 MB in the end (delta: -26.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.17 ms. Allocated memory is still 151.0 MB. Free memory was 132.8 MB in the beginning and 131.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 376.77 ms. Allocated memory is still 151.0 MB. Free memory was 131.6 MB in the beginning and 121.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1837.97 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 121.3 MB in the beginning and 79.8 MB in the end (delta: 41.6 MB). Peak memory consumption was 71.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] int g; [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; [L30] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L30] RET A(g,h) [L31] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L31] RET A(g,h) [L32] COND TRUE \read(g) [L33] CALL reach_error() [L3] __assert_fail("0", "BallRajamani-SPIN2000-Fig1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 19 SDtfs, 11 SDslu, 51 SDs, 0 SdLazy, 68 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 1540 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...