/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/ldv-regression/mutex_lock_struct.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:38:02,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:38:02,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:38:02,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:38:02,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:38:02,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:38:02,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:38:02,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:38:02,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:38:02,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:38:02,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:38:02,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:38:02,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:38:02,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:38:02,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:38:02,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:38:02,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:38:02,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:38:02,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:38:02,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:38:02,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:38:02,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:38:02,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:38:02,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:38:02,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:38:02,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:38:02,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:38:02,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:38:02,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:38:02,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:38:02,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:38:02,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:38:02,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:38:02,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:38:02,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:38:02,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:38:02,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:38:02,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:38:02,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:38:02,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:38:02,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:38:02,658 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 [2020-10-28 14:38:02,708 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:38:02,708 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:38:02,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:38:02,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:38:02,710 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:38:02,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:38:02,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:38:02,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:38:02,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:38:02,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:38:02,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:38:02,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:38:02,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:38:02,712 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:38:02,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:38:02,712 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:38:02,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:38:02,713 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:38:02,713 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:38:02,713 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:38:02,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:38:02,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:38:02,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:38:02,714 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:38:02,714 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:38:02,714 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:38:02,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:38:02,715 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:38:02,715 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:38:02,715 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:38:03,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:38:03,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:38:03,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:38:03,135 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:38:03,136 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:38:03,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-10-28 14:38:03,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b77d3e7f6/5df512bd325949f4a4bd676317aafd8d/FLAG51f4e314f [2020-10-28 14:38:03,811 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:38:03,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-10-28 14:38:03,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b77d3e7f6/5df512bd325949f4a4bd676317aafd8d/FLAG51f4e314f [2020-10-28 14:38:04,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b77d3e7f6/5df512bd325949f4a4bd676317aafd8d [2020-10-28 14:38:04,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:38:04,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:38:04,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:38:04,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:38:04,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:38:04,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cfcdfc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04, skipping insertion in model container [2020-10-28 14:38:04,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:38:04,247 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:38:04,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:38:04,479 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:38:04,497 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:38:04,514 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:38:04,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04 WrapperNode [2020-10-28 14:38:04,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:38:04,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:38:04,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:38:04,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:38:04,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (1/1) ... [2020-10-28 14:38:04,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:38:04,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:38:04,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:38:04,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:38:04,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (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 [2020-10-28 14:38:04,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:38:04,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:38:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:38:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-10-28 14:38:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-10-28 14:38:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-10-28 14:38:04,632 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:38:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:38:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:38:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:38:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:38:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-10-28 14:38:04,633 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-10-28 14:38:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:38:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:38:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-10-28 14:38:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:38:04,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:38:04,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:38:04,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:38:04,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:38:04,908 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:38:04,908 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:38:04,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:38:04 BoogieIcfgContainer [2020-10-28 14:38:04,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:38:04,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:38:04,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:38:04,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:38:04,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:38:04" (1/3) ... [2020-10-28 14:38:04,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6532e3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:38:04, skipping insertion in model container [2020-10-28 14:38:04,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:38:04" (2/3) ... [2020-10-28 14:38:04,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6532e3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:38:04, skipping insertion in model container [2020-10-28 14:38:04,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:38:04" (3/3) ... [2020-10-28 14:38:04,921 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-10-28 14:38:04,936 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:38:04,941 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:38:04,957 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:38:04,998 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:38:04,998 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:38:04,999 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:38:04,999 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:38:04,999 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:38:04,999 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:38:04,999 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:38:04,999 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:38:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-28 14:38:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 14:38:05,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:05,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:05,056 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:05,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1210577418, now seen corresponding path program 1 times [2020-10-28 14:38:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:05,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858368872] [2020-10-28 14:38:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:05,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:05,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:05,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:38:05,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:05,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-28 14:38:05,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:05,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:38:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:38:05,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:38:05,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:38:05,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:38:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:38:05,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:38:05,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:38:05,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:38:05,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:38:05,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:38:05,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:38:05,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:38:05,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:38:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:38:05,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:38:05,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:38:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:38:05,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858368872] [2020-10-28 14:38:05,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:38:05,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:38:05,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361144993] [2020-10-28 14:38:05,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:38:05,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:38:05,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:38:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:38:05,937 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 6 states. [2020-10-28 14:38:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:38:06,252 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-28 14:38:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:38:06,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-28 14:38:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:38:06,262 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:38:06,262 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 14:38:06,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:38:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 14:38:06,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 14:38:06,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 14:38:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-10-28 14:38:06,307 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 12 [2020-10-28 14:38:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:38:06,308 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-10-28 14:38:06,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:38:06,308 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-10-28 14:38:06,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 14:38:06,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:38:06,309 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:38:06,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:38:06,310 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:38:06,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:38:06,311 INFO L82 PathProgramCache]: Analyzing trace with hash 110801358, now seen corresponding path program 1 times [2020-10-28 14:38:06,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:38:06,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936690072] [2020-10-28 14:38:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:38:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 14:38:06,332 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 14:38:06,332 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 14:38:06,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:38:06,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:38:06 BoogieIcfgContainer [2020-10-28 14:38:06,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:38:06,356 INFO L168 Benchmark]: Toolchain (without parser) took 2159.95 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 101.8 MB in the beginning and 126.3 MB in the end (delta: -24.5 MB). Peak memory consumption was 1.7 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:06,357 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:38:06,358 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.42 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:06,359 INFO L168 Benchmark]: Boogie Preprocessor took 35.01 ms. Allocated memory is still 125.8 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:06,360 INFO L168 Benchmark]: RCFGBuilder took 358.69 ms. Allocated memory is still 125.8 MB. Free memory was 90.5 MB in the beginning and 77.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:38:06,361 INFO L168 Benchmark]: TraceAbstraction took 1440.55 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 76.5 MB in the beginning and 126.3 MB in the end (delta: -49.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:38:06,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 125.8 MB. Free memory is still 85.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.42 ms. Allocated memory is still 125.8 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.01 ms. Allocated memory is still 125.8 MB. Free memory was 91.9 MB in the beginning and 90.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.69 ms. Allocated memory is still 125.8 MB. Free memory was 90.5 MB in the beginning and 77.0 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1440.55 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 76.5 MB in the beginning and 126.3 MB in the end (delta: -49.8 MB). There was no memory consumed. 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: [L35] struct mutex m; [L36] m.is_locked = 0 [L38] CALL mutex_lock(&m) [L23] EXPR a->is_locked [L23] COND FALSE !(a->is_locked == 1) [L24] a->is_locked = 1 [L38] RET mutex_lock(&m) [L42] CALL mutex_lock(&m) [L23] EXPR a->is_locked [L23] COND TRUE a->is_locked == 1 [L23] CALL err() [L15] CALL reach_error() [L3] __assert_fail("0", "mutex_lock_struct.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 8 SDslu, 41 SDs, 0 SdLazy, 38 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 0.6s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 605 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...