/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=BIGGEST --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 [2020-09-24 20:28:37,563 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:28:37,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:28:37,593 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:28:37,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:28:37,595 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:28:37,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:28:37,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:28:37,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:28:37,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:28:37,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:28:37,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:28:37,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:28:37,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:28:37,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:28:37,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:28:37,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:28:37,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:28:37,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:28:37,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:28:37,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:28:37,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:28:37,625 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:28:37,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:28:37,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:28:37,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:28:37,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:28:37,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:28:37,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:28:37,632 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:28:37,632 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:28:37,633 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:28:37,634 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:28:37,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:28:37,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:28:37,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:28:37,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:28:37,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:28:37,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:28:37,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:28:37,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:28:37,641 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 [2020-09-24 20:28:37,667 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:28:37,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:28:37,669 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:28:37,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:28:37,670 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:28:37,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:28:37,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:28:37,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:28:37,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:28:37,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:28:37,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:28:37,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:28:37,674 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:28:37,675 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:28:37,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:28:37,675 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:28:37,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:28:37,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:28:37,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:28:37,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:28:37,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:28:37,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:28:37,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:28:37,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:28:37,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:28:37,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:28:37,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:28:37,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:28:37,683 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:28:37,683 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true; [2020-09-24 20:28:38,155 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:28:38,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:28:38,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:28:38,182 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:28:38,183 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:28:38,184 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-09-24 20:28:38,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8f331c8f/f16f501fb07d4ad89321e67f5692966c/FLAGbbf9a809b [2020-09-24 20:28:38,841 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:28:38,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-09-24 20:28:38,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8f331c8f/f16f501fb07d4ad89321e67f5692966c/FLAGbbf9a809b [2020-09-24 20:28:39,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8f331c8f/f16f501fb07d4ad89321e67f5692966c [2020-09-24 20:28:39,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:28:39,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:28:39,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:28:39,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:28:39,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:28:39,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6c8a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39, skipping insertion in model container [2020-09-24 20:28:39,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:28:39,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:28:39,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:28:39,472 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:28:39,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:28:39,515 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:28:39,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39 WrapperNode [2020-09-24 20:28:39,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:28:39,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:28:39,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:28:39,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:28:39,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (1/1) ... [2020-09-24 20:28:39,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:28:39,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:28:39,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:28:39,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:28:39,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (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 [2020-09-24 20:28:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:28:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:28:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-09-24 20:28:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-24 20:28:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-24 20:28:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:28:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:28:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-09-24 20:28:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-24 20:28:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 20:28:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 20:28:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-24 20:28:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:28:39,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 20:28:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 20:28:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:28:39,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:28:39,947 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:28:39,948 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 20:28:39,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:39 BoogieIcfgContainer [2020-09-24 20:28:39,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:28:39,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:28:39,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:28:39,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:28:39,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:28:39" (1/3) ... [2020-09-24 20:28:39,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630960da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:39, skipping insertion in model container [2020-09-24 20:28:39,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:28:39" (2/3) ... [2020-09-24 20:28:39,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@630960da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:28:39, skipping insertion in model container [2020-09-24 20:28:39,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:28:39" (3/3) ... [2020-09-24 20:28:39,963 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2020-09-24 20:28:39,982 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:28:39,997 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:28:40,019 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:28:40,050 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:28:40,050 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:28:40,050 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:28:40,050 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:28:40,051 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:28:40,051 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:28:40,051 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:28:40,051 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:28:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-24 20:28:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 20:28:40,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:40,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:28:40,087 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:40,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1355543847, now seen corresponding path program 1 times [2020-09-24 20:28:40,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:40,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480705228] [2020-09-24 20:28:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:40,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:40,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:40,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 20:28:40,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:40,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-09-24 20:28:40,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 20:28:40,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 20:28:40,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 20:28:40,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 20:28:40,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:28:40,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:28:40,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:28:40,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:28:40,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 20:28:40,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:28:40,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 20:28:40,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:28:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:28:40,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:28:40,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:28:40,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 20:28:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:28:40,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480705228] [2020-09-24 20:28:40,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:28:40,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 20:28:40,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278543390] [2020-09-24 20:28:40,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 20:28:40,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:28:40,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 20:28:40,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-24 20:28:40,763 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 7 states. [2020-09-24 20:28:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:28:41,076 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-09-24 20:28:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 20:28:41,079 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-24 20:28:41,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:28:41,091 INFO L225 Difference]: With dead ends: 53 [2020-09-24 20:28:41,091 INFO L226 Difference]: Without dead ends: 25 [2020-09-24 20:28:41,096 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 [2020-09-24 20:28:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-24 20:28:41,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-24 20:28:41,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 20:28:41,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 24 transitions. [2020-09-24 20:28:41,141 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 24 transitions. Word has length 16 [2020-09-24 20:28:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:28:41,141 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 24 transitions. [2020-09-24 20:28:41,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 20:28:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 24 transitions. [2020-09-24 20:28:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 20:28:41,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:28:41,143 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] [2020-09-24 20:28:41,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:28:41,144 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:28:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:28:41,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1636243467, now seen corresponding path program 1 times [2020-09-24 20:28:41,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:28:41,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958397258] [2020-09-24 20:28:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:28:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:28:41,165 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:28:41,165 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:28:41,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:28:41,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:28:41 BoogieIcfgContainer [2020-09-24 20:28:41,193 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:28:41,197 INFO L168 Benchmark]: Toolchain (without parser) took 2002.11 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 101.8 MB in the beginning and 107.6 MB in the end (delta: -5.7 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:41,198 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 20:28:41,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.72 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:41,200 INFO L168 Benchmark]: Boogie Preprocessor took 40.32 ms. Allocated memory is still 138.4 MB. Free memory was 91.5 MB in the beginning and 90.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:41,201 INFO L168 Benchmark]: RCFGBuilder took 396.38 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.0 MB in the beginning and 165.0 MB in the end (delta: -75.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:41,202 INFO L168 Benchmark]: TraceAbstraction took 1238.50 ms. Allocated memory is still 200.8 MB. Free memory was 165.0 MB in the beginning and 107.6 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB. [2020-09-24 20:28:41,207 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.72 ms. Allocated memory is still 138.4 MB. Free memory was 101.2 MB in the beginning and 91.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.32 ms. Allocated memory is still 138.4 MB. Free memory was 91.5 MB in the beginning and 90.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 396.38 ms. Allocated memory was 138.4 MB in the beginning and 200.8 MB in the end (delta: 62.4 MB). Free memory was 90.0 MB in the beginning and 165.0 MB in the end (delta: -75.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1238.50 ms. Allocated memory is still 200.8 MB. Free memory was 165.0 MB in the beginning and 107.6 MB in the end (delta: 57.4 MB). Peak memory consumption was 57.4 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: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, 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, 0.1s 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...