/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:10:09,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:10:09,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:10:10,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:10:10,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:10:10,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:10:10,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:10:10,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:10:10,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:10:10,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:10:10,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:10:10,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:10:10,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:10:10,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:10:10,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:10:10,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:10:10,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:10:10,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:10:10,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:10:10,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:10:10,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:10:10,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:10:10,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:10:10,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:10:10,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:10:10,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:10:10,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:10:10,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:10:10,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:10:10,142 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:10:10,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:10:10,143 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:10:10,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:10:10,144 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:10:10,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:10:10,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:10:10,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:10:10,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:10:10,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:10:10,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:10:10,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:10:10,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:10:10,146 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:10:10,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:10:10,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:10:10,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:10:10,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:10:10,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:10:10,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:10:10,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:10:10,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:10:10,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:10:10,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:10:10,148 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:10:10,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:10:10,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:10:10,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:10:10,149 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:10:10,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:10:10,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:10:10,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:10:10,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:10:10,556 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:10:10,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2021-02-21 16:10:10,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bedd3471/f02d04104a8b4f8489deacf15665f457/FLAG16f2beded [2021-02-21 16:10:11,214 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:10:11,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2021-02-21 16:10:11,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bedd3471/f02d04104a8b4f8489deacf15665f457/FLAG16f2beded [2021-02-21 16:10:11,597 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bedd3471/f02d04104a8b4f8489deacf15665f457 [2021-02-21 16:10:11,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:10:11,618 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:10:11,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:10:11,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:10:11,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:10:11,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5baf95cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11, skipping insertion in model container [2021-02-21 16:10:11,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:10:11,661 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:10:11,860 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i[295,308] [2021-02-21 16:10:11,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:10:11,890 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:10:11,904 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i[295,308] [2021-02-21 16:10:11,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:10:11,926 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:10:11,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11 WrapperNode [2021-02-21 16:10:11,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:10:11,928 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:10:11,928 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:10:11,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:10:11,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,949 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,959 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... [2021-02-21 16:10:11,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:10:11,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:10:11,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:10:11,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:10:11,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-21 16:10:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:10:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:10:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:10:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2021-02-21 16:10:12,073 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-02-21 16:10:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-02-21 16:10:12,074 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:10:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:10:12,074 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure err [2021-02-21 16:10:12,075 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-02-21 16:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-02-21 16:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:10:12,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:10:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:10:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:10:12,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:10:12,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:10:12,385 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:10:12,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:10:12 BoogieIcfgContainer [2021-02-21 16:10:12,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:10:12,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:10:12,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:10:12,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:10:12,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:10:11" (1/3) ... [2021-02-21 16:10:12,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e051d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:10:12, skipping insertion in model container [2021-02-21 16:10:12,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:11" (2/3) ... [2021-02-21 16:10:12,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19e051d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:10:12, skipping insertion in model container [2021-02-21 16:10:12,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:10:12" (3/3) ... [2021-02-21 16:10:12,417 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2021-02-21 16:10:12,437 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:10:12,450 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:10:12,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:10:12,561 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:10:12,562 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:10:12,562 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:10:12,562 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:10:12,562 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:10:12,562 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:10:12,563 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:10:12,563 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:10:12,585 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-02-21 16:10:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-21 16:10:12,592 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:10:12,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:10:12,593 INFO L428 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:10:12,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:10:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2065797830, now seen corresponding path program 1 times [2021-02-21 16:10:12,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:10:12,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241157577] [2021-02-21 16:10:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:10:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:10:12,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:12,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:10:12,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:12,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:10:12,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:12,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:10:12,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:12,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:10:12,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:12,899 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:10:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:10:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:10:12,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:12,998 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:10:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:10:13,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241157577] [2021-02-21 16:10:13,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:10:13,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:10:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590020644] [2021-02-21 16:10:13,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:10:13,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:10:13,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:10:13,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:10:13,034 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2021-02-21 16:10:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:10:13,410 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-02-21 16:10:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:10:13,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-02-21 16:10:13,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:10:13,427 INFO L225 Difference]: With dead ends: 40 [2021-02-21 16:10:13,428 INFO L226 Difference]: Without dead ends: 18 [2021-02-21 16:10:13,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:10:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-02-21 16:10:13,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-02-21 16:10:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-02-21 16:10:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2021-02-21 16:10:13,506 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2021-02-21 16:10:13,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:10:13,507 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2021-02-21 16:10:13,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:10:13,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2021-02-21 16:10:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:10:13,510 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:10:13,510 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:10:13,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:10:13,511 INFO L428 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:10:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:10:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1711981810, now seen corresponding path program 1 times [2021-02-21 16:10:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:10:13,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407292813] [2021-02-21 16:10:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:10:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:10:13,588 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:10:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:10:13,632 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:10:13,675 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:10:13,675 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:10:13,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:10:13,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:10:13 BoogieIcfgContainer [2021-02-21 16:10:13,732 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:10:13,738 INFO L168 Benchmark]: Toolchain (without parser) took 2129.84 ms. Allocated memory is still 161.5 MB. Free memory was 136.4 MB in the beginning and 95.5 MB in the end (delta: 40.8 MB). Peak memory consumption was 42.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:13,739 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:10:13,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.46 ms. Allocated memory is still 161.5 MB. Free memory was 135.3 MB in the beginning and 125.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:13,743 INFO L168 Benchmark]: Boogie Preprocessor took 34.27 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:13,744 INFO L168 Benchmark]: RCFGBuilder took 429.49 ms. Allocated memory is still 161.5 MB. Free memory was 124.4 MB in the beginning and 110.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:13,746 INFO L168 Benchmark]: TraceAbstraction took 1338.55 ms. Allocated memory is still 161.5 MB. Free memory was 110.2 MB in the beginning and 95.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:13,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 161.5 MB. Free memory is still 134.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.46 ms. Allocated memory is still 161.5 MB. Free memory was 135.3 MB in the beginning and 125.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.27 ms. Allocated memory is still 161.5 MB. Free memory was 125.9 MB in the beginning and 124.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 429.49 ms. Allocated memory is still 161.5 MB. Free memory was 124.4 MB in the beginning and 110.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1338.55 ms. Allocated memory is still 161.5 MB. Free memory was 110.2 MB in the beginning and 95.5 MB in the end (delta: 14.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L35] struct mutex m; [L36] m.is_locked = 0 VAL [m={3:0}] [L38] CALL mutex_lock(&m) VAL [a={3:0}] [L23] EXPR a->is_locked VAL [a={3:0}, a={3:0}, a->is_locked=0] [L23] COND FALSE !(a->is_locked == 1) [L24] a->is_locked = 1 VAL [a={3:0}, a={3:0}] [L38] RET mutex_lock(&m) VAL [m={3:0}] [L42] CALL mutex_lock(&m) VAL [a={3:0}] [L23] EXPR a->is_locked VAL [a={3:0}, a={3:0}, a->is_locked=1] [L23] COND TRUE a->is_locked == 1 [L23] CALL err() [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 16 SDtfs, 8 SDslu, 38 SDs, 0 SdLazy, 38 SolverSat, 7 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, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 540 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...