/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_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:10:03,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:10:03,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:10:03,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:10:03,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:10:03,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:10:03,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:10:03,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:10:03,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:10:03,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:10:03,380 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:10:03,382 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:10:03,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:10:03,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:10:03,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:10:03,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:10:03,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:10:03,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:10:03,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:10:03,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:10:03,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:10:03,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:10:03,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:10:03,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:10:03,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:10:03,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:10:03,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:10:03,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:10:03,461 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 16:10:03,489 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:10:03,489 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:10:03,491 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:10:03,491 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:10:03,491 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:10:03,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:10:03,492 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:10:03,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:10:03,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:10:03,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:10:03,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:10:03,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:10:03,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:10:03,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:10:03,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:10:03,494 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:10:03,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:10:03,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:10:03,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:10:03,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:10:03,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:10:03,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:10:03,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:10:03,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:10:03,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:10:03,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:10:03,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:10:03,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:10:03,496 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:10:03,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:10:03,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:10:03,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:10:03,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:10:03,969 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:10:03,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2021-02-21 16:10:04,050 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686b5eaab/c5fff4006a7141a5a4cbec3fa76ccd37/FLAGe7e7f16ee [2021-02-21 16:10:04,745 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:10:04,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2021-02-21 16:10:04,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686b5eaab/c5fff4006a7141a5a4cbec3fa76ccd37/FLAGe7e7f16ee [2021-02-21 16:10:05,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686b5eaab/c5fff4006a7141a5a4cbec3fa76ccd37 [2021-02-21 16:10:05,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:10:05,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:10:05,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:10:05,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:10:05,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:10:05,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60110c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05, skipping insertion in model container [2021-02-21 16:10:05,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:10:05,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:10:05,323 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_int.i[293,306] [2021-02-21 16:10:05,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:10:05,359 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:10:05,382 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_int.i[293,306] [2021-02-21 16:10:05,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:10:05,406 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:10:05,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05 WrapperNode [2021-02-21 16:10:05,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:10:05,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:10:05,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:10:05,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:10:05,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (1/1) ... [2021-02-21 16:10:05,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:10:05,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:10:05,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:10:05,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:10:05,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (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 16:10:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:10:05,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:10:05,552 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:10:05,552 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2021-02-21 16:10:05,552 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-02-21 16:10:05,552 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-02-21 16:10:05,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:10:05,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:10:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:10:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:10:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:10:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure err [2021-02-21 16:10:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-02-21 16:10:05,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:10:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:10:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-02-21 16:10:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:10:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:10:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:10:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:10:05,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:10:05,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:10:05,865 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:10:05,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:10:05 BoogieIcfgContainer [2021-02-21 16:10:05,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:10:05,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:10:05,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:10:05,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:10:05,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:10:05" (1/3) ... [2021-02-21 16:10:05,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1098b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:10:05, skipping insertion in model container [2021-02-21 16:10:05,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:05" (2/3) ... [2021-02-21 16:10:05,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1098b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:10:05, skipping insertion in model container [2021-02-21 16:10:05,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:10:05" (3/3) ... [2021-02-21 16:10:05,894 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2021-02-21 16:10:05,916 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:10:05,928 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:10:05,984 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:10:06,102 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:10:06,103 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:10:06,104 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:10:06,104 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:10:06,104 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:10:06,105 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:10:06,105 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:10:06,105 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:10:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2021-02-21 16:10:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-21 16:10:06,165 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:10:06,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:10:06,166 INFO L428 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:10:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:10:06,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2065797830, now seen corresponding path program 1 times [2021-02-21 16:10:06,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:10:06,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619392897] [2021-02-21 16:10:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:10:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:10:06,521 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:06,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:10:06,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:06,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:10:06,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:06,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:10:06,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:06,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:10:06,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:06,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:10:06,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:10:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:10:06,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:10:06,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:10:06,655 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 16:10:06,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619392897] [2021-02-21 16:10:06,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:10:06,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:10:06,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684381486] [2021-02-21 16:10:06,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:10:06,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:10:06,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:10:06,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:10:06,684 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2021-02-21 16:10:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:10:06,871 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-02-21 16:10:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 16:10:06,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-02-21 16:10:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:10:06,882 INFO L225 Difference]: With dead ends: 40 [2021-02-21 16:10:06,882 INFO L226 Difference]: Without dead ends: 18 [2021-02-21 16:10:06,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:10:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-02-21 16:10:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-02-21 16:10:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-02-21 16:10:06,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2021-02-21 16:10:06,932 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 11 [2021-02-21 16:10:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:10:06,932 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2021-02-21 16:10:06,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:10:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2021-02-21 16:10:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:10:06,934 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:10:06,934 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:10:06,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:10:06,935 INFO L428 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:10:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:10:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1711981810, now seen corresponding path program 1 times [2021-02-21 16:10:06,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:10:06,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110928279] [2021-02-21 16:10:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:10:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:10:06,981 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:10:07,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:10:07,034 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:10:07,075 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:10:07,077 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:10:07,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:10:07,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:10:07 BoogieIcfgContainer [2021-02-21 16:10:07,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:10:07,114 INFO L168 Benchmark]: Toolchain (without parser) took 1986.00 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 87.0 MB in the end (delta: 40.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:07,115 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:10:07,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.47 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:07,117 INFO L168 Benchmark]: Boogie Preprocessor took 36.23 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:07,118 INFO L168 Benchmark]: RCFGBuilder took 425.33 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 101.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:07,119 INFO L168 Benchmark]: TraceAbstraction took 1235.97 ms. Allocated memory is still 151.0 MB. Free memory was 101.2 MB in the beginning and 87.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:07,122 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 266.47 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.23 ms. Allocated memory is still 151.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 425.33 ms. Allocated memory is still 151.0 MB. Free memory was 115.4 MB in the beginning and 101.6 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1235.97 ms. Allocated memory is still 151.0 MB. Free memory was 101.2 MB in the beginning and 87.0 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L32] int m; [L33] m = 0 VAL [m={3:0}] [L35] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=0, a={3:0}, a={3:0}] [L20] COND FALSE !(*a == 1) [L21] *a = 1 VAL [a={3:0}, a={3:0}] [L35] RET mutex_lock(&m) VAL [m={3:0}] [L39] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=1, a={3:0}, a={3:0}] [L20] COND TRUE *a == 1 [L20] CALL err() [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.2s, 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, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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...