/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:39:32,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:39:32,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:39:32,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:39:32,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:39:32,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:39:32,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:39:32,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:39:32,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:39:32,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:39:32,960 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:39:32,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:39:32,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:39:32,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:39:32,965 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:39:32,967 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:39:32,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:39:32,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:39:32,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:39:32,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:39:32,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:39:32,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:39:32,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:39:32,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:39:32,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:39:32,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:39:33,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:39:33,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:39:33,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:39:33,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:39:33,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:39:33,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:39:33,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:39:33,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:39:33,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:39:33,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:39:33,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:39:33,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:39:33,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:39:33,028 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:39:33,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:39:33,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:39:33,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:39:33,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:39:33,030 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:39:33,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:39:33,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:39:33,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:39:33,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:39:33,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:39:33,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:39:33,032 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:39:33,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:39:33,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:39:33,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:39:33,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:39:33,549 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:39:33,551 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-09-04 16:39:33,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bef301ee/2c946ca4c2114778b4fb1c88ef4f0d5f/FLAGbfabd4f81 [2020-09-04 16:39:34,302 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:39:34,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-09-04 16:39:34,313 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bef301ee/2c946ca4c2114778b4fb1c88ef4f0d5f/FLAGbfabd4f81 [2020-09-04 16:39:34,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bef301ee/2c946ca4c2114778b4fb1c88ef4f0d5f [2020-09-04 16:39:34,601 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:39:34,606 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:39:34,609 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:39:34,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:39:34,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:39:34,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:39:34" (1/1) ... [2020-09-04 16:39:34,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3161b126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:34, skipping insertion in model container [2020-09-04 16:39:34,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:39:34" (1/1) ... [2020-09-04 16:39:34,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:39:34,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:39:34,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:39:34,983 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:39:35,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:39:35,048 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:39:35,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35 WrapperNode [2020-09-04 16:39:35,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:39:35,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:39:35,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:39:35,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:39:35,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... [2020-09-04 16:39:35,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... [2020-09-04 16:39:35,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... [2020-09-04 16:39:35,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... [2020-09-04 16:39:35,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... [2020-09-04 16:39:35,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... [2020-09-04 16:39:35,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... [2020-09-04 16:39:35,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:39:35,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:39:35,117 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:39:35,117 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:39:35,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:39:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:39:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:39:35,377 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-09-04 16:39:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-04 16:39:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-04 16:39:35,378 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:39:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:39:35,378 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-09-04 16:39:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-04 16:39:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:39:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:39:35,379 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-04 16:39:35,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:39:35,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:39:35,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:39:35,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:39:35,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:39:35,681 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:39:35,682 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:39:35,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:39:35 BoogieIcfgContainer [2020-09-04 16:39:35,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:39:35,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:39:35,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:39:35,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:39:35,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:39:34" (1/3) ... [2020-09-04 16:39:35,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd5ba47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:39:35, skipping insertion in model container [2020-09-04 16:39:35,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:39:35" (2/3) ... [2020-09-04 16:39:35,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd5ba47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:39:35, skipping insertion in model container [2020-09-04 16:39:35,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:39:35" (3/3) ... [2020-09-04 16:39:35,701 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2020-09-04 16:39:35,725 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:39:35,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:39:35,816 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:39:35,866 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:39:35,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:39:35,866 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:39:35,866 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:39:35,867 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:39:35,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:39:35,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:39:35,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:39:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 16:39:35,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 16:39:35,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:39:35,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:39:35,897 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:39:35,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:39:35,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1355543847, now seen corresponding path program 1 times [2020-09-04 16:39:35,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:39:35,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939711444] [2020-09-04 16:39:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:39:35,986 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:39:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:39:36,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:39:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:39:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:39:36,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939711444] [2020-09-04 16:39:36,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:39:36,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:39:36,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918226501] [2020-09-04 16:39:36,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:39:36,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:39:36,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:39:36,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:39:36,279 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 7 states. [2020-09-04 16:39:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:39:36,590 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-09-04 16:39:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:39:36,594 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-04 16:39:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:39:36,609 INFO L225 Difference]: With dead ends: 53 [2020-09-04 16:39:36,609 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 16:39:36,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:39:36,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 16:39:36,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 16:39:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 16:39:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 24 transitions. [2020-09-04 16:39:36,702 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 24 transitions. Word has length 16 [2020-09-04 16:39:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:39:36,703 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 24 transitions. [2020-09-04 16:39:36,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:39:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 24 transitions. [2020-09-04 16:39:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 16:39:36,706 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:39:36,707 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:39:36,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:39:36,709 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:39:36,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:39:36,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1636243467, now seen corresponding path program 1 times [2020-09-04 16:39:36,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:39:36,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888440643] [2020-09-04 16:39:36,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:39:36,719 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:39:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:39:36,769 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:39:36,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:39:36,811 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:39:36,840 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:39:36,841 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:39:36,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:39:36,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:39:36 BoogieIcfgContainer [2020-09-04 16:39:36,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:39:36,869 INFO L168 Benchmark]: Toolchain (without parser) took 2263.55 ms. Allocated memory was 138.4 MB in the beginning and 205.5 MB in the end (delta: 67.1 MB). Free memory was 101.6 MB in the beginning and 121.5 MB in the end (delta: -19.9 MB). Peak memory consumption was 47.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:36,869 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:39:36,870 INFO L168 Benchmark]: CACSL2BoogieTranslator took 441.56 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:36,871 INFO L168 Benchmark]: Boogie Preprocessor took 65.25 ms. Allocated memory is still 138.4 MB. Free memory was 91.7 MB in the beginning and 90.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:36,872 INFO L168 Benchmark]: RCFGBuilder took 572.03 ms. Allocated memory was 138.4 MB in the beginning and 205.5 MB in the end (delta: 67.1 MB). Free memory was 90.1 MB in the beginning and 169.8 MB in the end (delta: -79.7 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:36,873 INFO L168 Benchmark]: TraceAbstraction took 1174.81 ms. Allocated memory is still 205.5 MB. Free memory was 169.8 MB in the beginning and 121.5 MB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:39:36,877 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 138.4 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 441.56 ms. Allocated memory is still 138.4 MB. Free memory was 101.4 MB in the beginning and 91.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 65.25 ms. Allocated memory is still 138.4 MB. Free memory was 91.7 MB in the beginning and 90.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 572.03 ms. Allocated memory was 138.4 MB in the beginning and 205.5 MB in the end (delta: 67.1 MB). Free memory was 90.1 MB in the beginning and 169.8 MB in the end (delta: -79.7 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1174.81 ms. Allocated memory is still 205.5 MB. Free memory was 169.8 MB in the beginning and 121.5 MB in the end (delta: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L30] int m; [L31] m = 0 [L33] CALL mutex_lock(&m) [L18] EXPR \read(*a) [L18] COND FALSE !(*a == 1) [L19] *a = 1 [L33] RET mutex_lock(&m) [L37] CALL mutex_lock(&m) [L18] EXPR \read(*a) [L18] COND TRUE *a == 1 [L18] CALL err() [L14] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 21 SDslu, 67 SDs, 0 SdLazy, 62 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 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...