/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:57:32,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:57:32,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:57:32,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:57:32,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:57:32,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:57:32,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:57:32,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:57:32,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:57:32,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:57:32,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:57:32,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:57:32,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:57:32,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:57:32,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:57:32,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:57:32,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:57:32,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:57:32,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:57:32,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:57:32,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:57:32,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:57:32,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:57:32,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:57:32,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:57:32,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:57:32,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:57:32,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:57:32,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:57:32,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:57:32,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:57:32,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:57:32,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:57:32,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:57:32,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:57:32,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:57:32,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:57:32,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:57:32,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:57:32,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:57:32,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:57:32,380 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 [2020-09-25 00:57:32,438 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:57:32,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:57:32,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:57:32,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:57:32,441 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:57:32,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:57:32,441 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:57:32,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:57:32,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:57:32,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:57:32,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:57:32,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:57:32,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:57:32,443 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:57:32,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:57:32,444 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:57:32,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:57:32,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:57:32,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:57:32,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:57:32,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:57:32,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:57:32,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:57:32,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:57:32,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:57:32,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:57:32,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:57:32,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:57:32,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:57:32,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=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=DEEPEST;log-additional-information=true; [2020-09-25 00:57:32,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:57:32,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:57:32,974 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:57:32,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:57:32,976 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:57:32,977 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-09-25 00:57:33,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32f72d551/870f9358163249758b44b2d19e7db147/FLAG9d5bba170 [2020-09-25 00:57:33,581 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:57:33,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-09-25 00:57:33,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32f72d551/870f9358163249758b44b2d19e7db147/FLAG9d5bba170 [2020-09-25 00:57:33,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32f72d551/870f9358163249758b44b2d19e7db147 [2020-09-25 00:57:33,947 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:57:33,953 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:57:33,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:57:33,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:57:33,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:57:33,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:57:33" (1/1) ... [2020-09-25 00:57:33,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7e2148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:33, skipping insertion in model container [2020-09-25 00:57:33,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:57:33" (1/1) ... [2020-09-25 00:57:33,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:57:33,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:57:34,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:57:34,235 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:57:34,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:57:34,274 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:57:34,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34 WrapperNode [2020-09-25 00:57:34,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:57:34,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:57:34,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:57:34,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:57:34,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (1/1) ... [2020-09-25 00:57:34,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (1/1) ... [2020-09-25 00:57:34,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (1/1) ... [2020-09-25 00:57:34,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (1/1) ... [2020-09-25 00:57:34,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (1/1) ... [2020-09-25 00:57:34,305 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (1/1) ... [2020-09-25 00:57:34,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (1/1) ... [2020-09-25 00:57:34,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:57:34,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:57:34,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:57:34,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:57:34,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (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 [2020-09-25 00:57:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:57:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:57:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-09-25 00:57:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-25 00:57:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-25 00:57:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:57:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:57:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-09-25 00:57:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-25 00:57:34,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 00:57:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 00:57:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-25 00:57:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:57:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 00:57:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 00:57:34,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:57:34,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:57:34,750 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:57:34,751 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 00:57:34,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:57:34 BoogieIcfgContainer [2020-09-25 00:57:34,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:57:34,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:57:34,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:57:34,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:57:34,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:57:33" (1/3) ... [2020-09-25 00:57:34,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125f7efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:57:34, skipping insertion in model container [2020-09-25 00:57:34,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:57:34" (2/3) ... [2020-09-25 00:57:34,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@125f7efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:57:34, skipping insertion in model container [2020-09-25 00:57:34,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:57:34" (3/3) ... [2020-09-25 00:57:34,765 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2020-09-25 00:57:34,777 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:57:34,787 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:57:34,815 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:57:34,841 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:57:34,841 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:57:34,841 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:57:34,841 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:57:34,841 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:57:34,842 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:57:34,842 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:57:34,842 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:57:34,864 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-25 00:57:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 00:57:34,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:34,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:34,872 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1355543847, now seen corresponding path program 1 times [2020-09-25 00:57:34,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:34,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119261639] [2020-09-25 00:57:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:35,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:35,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:35,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 00:57:35,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:35,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-09-25 00:57:35,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:57:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-25 00:57:35,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 00:57:35,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 00:57:35,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:57:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:57:35,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:57:35,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:57:35,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 00:57:35,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:57:35,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 00:57:35,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 00:57:35,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:57:35,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:57:35,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:57:35,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:57:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:57:35,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119261639] [2020-09-25 00:57:35,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:57:35,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 00:57:35,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065574922] [2020-09-25 00:57:35,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:57:35,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:57:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:57:35,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:57:35,511 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 7 states. [2020-09-25 00:57:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:57:35,721 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-09-25 00:57:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:57:35,723 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-25 00:57:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:57:35,734 INFO L225 Difference]: With dead ends: 53 [2020-09-25 00:57:35,734 INFO L226 Difference]: Without dead ends: 25 [2020-09-25 00:57:35,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:57:35,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-25 00:57:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-25 00:57:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-25 00:57:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 24 transitions. [2020-09-25 00:57:35,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 24 transitions. Word has length 16 [2020-09-25 00:57:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:57:35,791 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 24 transitions. [2020-09-25 00:57:35,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:57:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 24 transitions. [2020-09-25 00:57:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 00:57:35,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:57:35,793 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:57:35,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:57:35,794 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:57:35,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:57:35,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1636243467, now seen corresponding path program 1 times [2020-09-25 00:57:35,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:57:35,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462295300] [2020-09-25 00:57:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:57:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 00:57:35,837 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 00:57:35,838 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 00:57:35,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:57:35,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 12:57:35 BoogieIcfgContainer [2020-09-25 00:57:35,869 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 00:57:35,873 INFO L168 Benchmark]: Toolchain (without parser) took 1923.05 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 106.6 MB in the beginning and 110.6 MB in the end (delta: -4.0 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. [2020-09-25 00:57:35,877 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 00:57:35,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.00 ms. Allocated memory is still 142.6 MB. Free memory was 106.0 MB in the beginning and 96.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:57:35,880 INFO L168 Benchmark]: Boogie Preprocessor took 32.79 ms. Allocated memory is still 142.6 MB. Free memory was 96.4 MB in the beginning and 94.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-09-25 00:57:35,881 INFO L168 Benchmark]: RCFGBuilder took 447.58 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 94.8 MB in the beginning and 169.0 MB in the end (delta: -74.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-25 00:57:35,883 INFO L168 Benchmark]: TraceAbstraction took 1111.88 ms. Allocated memory is still 203.9 MB. Free memory was 168.4 MB in the beginning and 110.6 MB in the end (delta: 57.8 MB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. [2020-09-25 00:57:35,893 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 321.00 ms. Allocated memory is still 142.6 MB. Free memory was 106.0 MB in the beginning and 96.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 32.79 ms. Allocated memory is still 142.6 MB. Free memory was 96.4 MB in the beginning and 94.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 447.58 ms. Allocated memory was 142.6 MB in the beginning and 203.9 MB in the end (delta: 61.3 MB). Free memory was 94.8 MB in the beginning and 169.0 MB in the end (delta: -74.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1111.88 ms. Allocated memory is still 203.9 MB. Free memory was 168.4 MB in the beginning and 110.6 MB in the end (delta: 57.8 MB). Peak memory consumption was 57.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L30] int m; [L31] m = 0 [L33] CALL mutex_lock(&m) [L18] EXPR \read(*a) [L18] COND FALSE !(*a == 1) [L19] *a = 1 [L33] RET mutex_lock(&m) [L37] CALL mutex_lock(&m) [L18] EXPR \read(*a) [L18] COND TRUE *a == 1 [L18] CALL err() [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 21 SDslu, 67 SDs, 0 SdLazy, 62 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 0.4s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 660 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...