/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:05:28,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:05:28,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:05:28,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:05:28,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:05:28,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:05:28,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:05:28,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:05:28,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:05:28,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:05:28,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:05:28,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:05:28,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:05:28,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:05:28,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:05:28,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:05:28,096 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:05:28,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:05:28,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:05:28,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:05:28,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:05:28,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:05:28,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:05:28,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:05:28,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 22:05:28,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 22:05:28,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 22:05:28,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 22:05:28,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 22:05:28,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 22:05:28,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 22:05:28,137 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 22:05:28,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 22:05:28,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 22:05:28,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 22:05:28,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 22:05:28,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 22:05:28,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 22:05:28,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:05:28,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:05:28,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:05:28,149 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 22:05:28,170 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:05:28,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:05:28,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:05:28,173 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:05:28,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:05:28,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:05:28,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:05:28,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:05:28,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:05:28,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:05:28,175 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:05:28,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:05:28,176 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:05:28,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:05:28,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:05:28,177 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:05:28,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:05:28,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:05:28,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:05:28,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:05:28,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:05:28,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:05:28,179 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 22:05:28,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:05:28,634 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:05:28,639 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:05:28,641 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:05:28,641 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:05:28,642 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-09-04 22:05:28,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bcb50ae9/88aa071267a04d86b3959e78a3485a76/FLAG99c943e4d [2020-09-04 22:05:29,321 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:05:29,322 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/mutex_lock_struct.i [2020-09-04 22:05:29,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bcb50ae9/88aa071267a04d86b3959e78a3485a76/FLAG99c943e4d [2020-09-04 22:05:29,689 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bcb50ae9/88aa071267a04d86b3959e78a3485a76 [2020-09-04 22:05:29,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:05:29,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:05:29,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:05:29,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:05:29,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:05:29,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:05:29" (1/1) ... [2020-09-04 22:05:29,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e001708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:29, skipping insertion in model container [2020-09-04 22:05:29,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:05:29" (1/1) ... [2020-09-04 22:05:29,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:05:29,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:05:29,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:05:29,981 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:05:30,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:05:30,021 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:05:30,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30 WrapperNode [2020-09-04 22:05:30,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:05:30,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:05:30,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:05:30,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:05:30,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (1/1) ... [2020-09-04 22:05:30,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (1/1) ... [2020-09-04 22:05:30,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (1/1) ... [2020-09-04 22:05:30,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (1/1) ... [2020-09-04 22:05:30,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (1/1) ... [2020-09-04 22:05:30,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (1/1) ... [2020-09-04 22:05:30,139 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (1/1) ... [2020-09-04 22:05:30,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:05:30,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:05:30,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:05:30,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:05:30,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (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 22:05:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:05:30,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:05:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-09-04 22:05:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-09-04 22:05:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-09-04 22:05:30,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-09-04 22:05:30,226 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-09-04 22:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-09-04 22:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 22:05:30,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:05:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:05:30,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:05:30,481 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:05:30,482 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 22:05:30,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:05:30 BoogieIcfgContainer [2020-09-04 22:05:30,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:05:30,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:05:30,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:05:30,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:05:30,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:05:29" (1/3) ... [2020-09-04 22:05:30,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d75ac2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:05:30, skipping insertion in model container [2020-09-04 22:05:30,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:05:30" (2/3) ... [2020-09-04 22:05:30,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d75ac2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:05:30, skipping insertion in model container [2020-09-04 22:05:30,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:05:30" (3/3) ... [2020-09-04 22:05:30,498 INFO L109 eAbstractionObserver]: Analyzing ICFG mutex_lock_struct.i [2020-09-04 22:05:30,512 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:05:30,523 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:05:30,548 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:05:30,591 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:05:30,591 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:05:30,592 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:05:30,593 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:05:30,594 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:05:30,594 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:05:30,594 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:05:30,594 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:05:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 22:05:30,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 22:05:30,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:05:30,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:05:30,627 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:05:30,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:05:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1355543847, now seen corresponding path program 1 times [2020-09-04 22:05:30,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:05:30,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300399486] [2020-09-04 22:05:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:05:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:05:30,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:05:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:05:30,992 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 22:05:30,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300399486] [2020-09-04 22:05:30,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:05:30,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:05:30,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703840187] [2020-09-04 22:05:31,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:05:31,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:05:31,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:05:31,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:05:31,022 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 7 states. [2020-09-04 22:05:31,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:05:31,291 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-09-04 22:05:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 22:05:31,293 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-04 22:05:31,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:05:31,304 INFO L225 Difference]: With dead ends: 53 [2020-09-04 22:05:31,305 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 22:05:31,309 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 22:05:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 22:05:31,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-09-04 22:05:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 22:05:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 24 transitions. [2020-09-04 22:05:31,360 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 24 transitions. Word has length 16 [2020-09-04 22:05:31,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:05:31,361 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 24 transitions. [2020-09-04 22:05:31,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:05:31,361 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 24 transitions. [2020-09-04 22:05:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 22:05:31,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:05:31,363 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 22:05:31,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:05:31,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:05:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:05:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1636243467, now seen corresponding path program 1 times [2020-09-04 22:05:31,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:05:31,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407615204] [2020-09-04 22:05:31,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:05:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:05:31,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:05:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:05:31,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:05:31,441 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:05:31,441 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:05:31,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:05:31,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:05:31 BoogieIcfgContainer [2020-09-04 22:05:31,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:05:31,484 INFO L168 Benchmark]: Toolchain (without parser) took 1777.20 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 103.6 MB in the beginning and 118.7 MB in the end (delta: -15.1 MB). Peak memory consumption was 48.8 MB. Max. memory is 7.1 GB. [2020-09-04 22:05:31,485 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 22:05:31,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.04 ms. Allocated memory is still 139.5 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 22:05:31,487 INFO L168 Benchmark]: Boogie Preprocessor took 118.89 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.5 MB in the beginning and 181.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:05:31,488 INFO L168 Benchmark]: RCFGBuilder took 346.37 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:05:31,489 INFO L168 Benchmark]: TraceAbstraction took 991.28 ms. Allocated memory is still 203.4 MB. Free memory was 166.8 MB in the beginning and 118.7 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-09-04 22:05:31,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.04 ms. Allocated memory is still 139.5 MB. Free memory was 103.4 MB in the beginning and 93.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.89 ms. Allocated memory was 139.5 MB in the beginning and 203.4 MB in the end (delta: 64.0 MB). Free memory was 93.5 MB in the beginning and 181.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 346.37 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 166.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 991.28 ms. Allocated memory is still 203.4 MB. Free memory was 166.8 MB in the beginning and 118.7 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L33] struct mutex m; VAL [m={2:0}] [L34] m.is_locked = 0 VAL [m={2:0}] [L36] CALL mutex_lock(&m) VAL [a={2:0}] [L21] EXPR a->is_locked VAL [a={2:0}, a={2:0}, a->is_locked=0] [L21] COND FALSE !(a->is_locked == 1) VAL [a={2:0}, a={2:0}, a->is_locked=0] [L22] a->is_locked = 1 VAL [a={2:0}, a={2:0}] [L36] RET mutex_lock(&m) VAL [m={2:0}] [L40] CALL mutex_lock(&m) VAL [a={2:0}] [L21] EXPR a->is_locked VAL [a={2:0}, a={2:0}, a->is_locked=1] [L21] COND TRUE a->is_locked == 1 VAL [a={2:0}, a={2:0}, a->is_locked=1] [L21] CALL err() [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 21 SDslu, 67 SDs, 0 SdLazy, 62 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 660 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...