/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/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:55:49,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:55:49,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:55:49,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:55:49,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:55:49,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:55:49,500 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:55:49,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:55:49,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:55:49,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:55:49,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:55:49,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:55:49,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:55:49,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:55:49,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:55:49,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:55:49,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:55:49,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 01:55:49,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 01:55:49,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 01:55:49,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:55:49,594 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:55:49,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:55:49,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:55:49,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:55:49,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:55:49,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:55:49,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:55:49,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:55:49,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:55:49,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:55:49,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:55:49,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:55:49,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:55:49,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:55:49,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:55:49,603 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:55:49,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:55:49,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:55:49,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:55:49,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:55:49,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:55:49,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:55:49,604 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:55:49,605 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:55:50,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:55:50,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:55:50,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:55:50,074 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:55:50,075 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:55:50,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2021-02-22 01:55:50,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d70fc6076/9c53aa9820a445d2b43df6f27c39484c/FLAGd0a3d546b [2021-02-22 01:55:50,687 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:55:50,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2021-02-22 01:55:50,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d70fc6076/9c53aa9820a445d2b43df6f27c39484c/FLAGd0a3d546b [2021-02-22 01:55:51,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d70fc6076/9c53aa9820a445d2b43df6f27c39484c [2021-02-22 01:55:51,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:55:51,109 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:55:51,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:55:51,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:55:51,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:55:51,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37f9ccde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51, skipping insertion in model container [2021-02-22 01:55:51,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:55:51,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:55:51,349 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] [2021-02-22 01:55:51,387 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:55:51,403 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:55:51,419 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] [2021-02-22 01:55:51,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:55:51,445 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:55:51,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51 WrapperNode [2021-02-22 01:55:51,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:55:51,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:55:51,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:55:51,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:55:51,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (1/1) ... [2021-02-22 01:55:51,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:55:51,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:55:51,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:55:51,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:55:51,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (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 [2021-02-22 01:55:51,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:55:51,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:55:51,595 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:55:51,595 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2021-02-22 01:55:51,595 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-02-22 01:55:51,596 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-02-22 01:55:51,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:55:51,596 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:55:51,596 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:55:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:55:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:55:51,597 INFO L130 BoogieDeclarations]: Found specification of procedure err [2021-02-22 01:55:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-02-22 01:55:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:55:51,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:55:51,599 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-02-22 01:55:51,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:55:51,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:55:51,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:55:51,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:55:51,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:55:51,935 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:55:51,935 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:55:51,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:55:51 BoogieIcfgContainer [2021-02-22 01:55:51,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:55:51,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:55:51,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:55:51,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:55:51,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:55:51" (1/3) ... [2021-02-22 01:55:51,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32829cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:55:51, skipping insertion in model container [2021-02-22 01:55:51,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:55:51" (2/3) ... [2021-02-22 01:55:51,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32829cec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:55:51, skipping insertion in model container [2021-02-22 01:55:51,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:55:51" (3/3) ... [2021-02-22 01:55:51,948 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2021-02-22 01:55:51,961 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:55:51,974 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:55:52,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:55:52,093 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:55:52,093 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:55:52,093 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:55:52,093 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:55:52,093 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:55:52,093 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:55:52,094 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:55:52,094 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:55:52,131 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-02-22 01:55:52,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-22 01:55:52,143 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:52,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-22 01:55:52,145 INFO L428 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:52,162 INFO L82 PathProgramCache]: Analyzing trace with hash -859708392, now seen corresponding path program 1 times [2021-02-22 01:55:52,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:52,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185126905] [2021-02-22 01:55:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:52,264 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:52,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:52,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:52,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:52,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:52,442 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:52,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:52,451 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:52,452 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-22 01:55:52,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:52,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:55:52,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:52,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:52,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:55:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:55:52,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:55:52,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:55:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:55:52,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185126905] [2021-02-22 01:55:52,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:55:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-22 01:55:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894063356] [2021-02-22 01:55:52,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-22 01:55:52,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:55:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-22 01:55:52,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-22 01:55:52,579 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 7 states. [2021-02-22 01:55:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:55:52,936 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-02-22 01:55:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-22 01:55:52,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2021-02-22 01:55:52,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:55:52,946 INFO L225 Difference]: With dead ends: 59 [2021-02-22 01:55:52,946 INFO L226 Difference]: Without dead ends: 30 [2021-02-22 01:55:52,950 INFO L677 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 [2021-02-22 01:55:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-22 01:55:52,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-22 01:55:52,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-22 01:55:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 29 transitions. [2021-02-22 01:55:53,002 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 29 transitions. Word has length 21 [2021-02-22 01:55:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:55:53,003 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 29 transitions. [2021-02-22 01:55:53,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-22 01:55:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 29 transitions. [2021-02-22 01:55:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-22 01:55:53,004 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:55:53,005 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, 1, 1, 1, 1, 1] [2021-02-22 01:55:53,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:55:53,005 INFO L428 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:55:53,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:55:53,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1552942948, now seen corresponding path program 1 times [2021-02-22 01:55:53,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:55:53,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432269223] [2021-02-22 01:55:53,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:55:53,010 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:55:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:55:53,042 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:55:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:55:53,073 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:55:53,124 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:55:53,124 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:55:53,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:55:53,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:55:53 BoogieIcfgContainer [2021-02-22 01:55:53,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:55:53,154 INFO L168 Benchmark]: Toolchain (without parser) took 2052.70 ms. Allocated memory is still 155.2 MB. Free memory was 130.9 MB in the beginning and 121.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:53,157 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 155.2 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:55:53,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 329.81 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 120.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:53,162 INFO L168 Benchmark]: Boogie Preprocessor took 46.96 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 119.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:53,163 INFO L168 Benchmark]: RCFGBuilder took 442.33 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 103.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-22 01:55:53,164 INFO L168 Benchmark]: TraceAbstraction took 1209.17 ms. Allocated memory is still 155.2 MB. Free memory was 103.1 MB in the beginning and 121.8 MB in the end (delta: -18.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:55:53,174 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 155.2 MB. Free memory is still 131.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 329.81 ms. Allocated memory is still 155.2 MB. Free memory was 129.9 MB in the beginning and 120.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.96 ms. Allocated memory is still 155.2 MB. Free memory was 120.5 MB in the beginning and 119.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 442.33 ms. Allocated memory is still 155.2 MB. Free memory was 119.3 MB in the beginning and 103.7 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1209.17 ms. Allocated memory is still 155.2 MB. Free memory was 103.1 MB in the beginning and 121.8 MB in the end (delta: -18.7 MB). There was no memory consumed. 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 [L35] CALL mutex_lock(&m) [L20] EXPR \read(*a) [L20] COND FALSE !(*a == 1) [L21] *a = 1 [L35] RET mutex_lock(&m) [L39] CALL mutex_lock(&m) [L20] EXPR \read(*a) [L20] COND TRUE *a == 1 [L20] CALL err() [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 28 SDtfs, 21 SDslu, 81 SDs, 0 SdLazy, 73 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=39occurred 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: No data available, 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...