/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:25:34,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:25:34,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:25:34,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 18:25:34,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 18:25:34,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 18:25:34,933 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 18:25:34,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 18:25:34,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 18:25:34,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 18:25:34,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 18:25:34,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2020-10-23 18:25:35,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:25:35,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:25:35,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:25:35,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 18:25:35,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:25:35,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:25:35,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:25:35,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:25:35,093 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:25:35,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:25:35,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:25:35,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:25:35,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:25:35,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:25:35,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:25:35,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:25:35,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:25:35,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:25:35,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:25:35,096 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:25:35,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:25:35,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:25:35,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:25:35,097 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:25:35,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:25:35,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:25:35,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:25:35,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:25:35,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:25:35,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:25:35,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:25:35,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:25:35,099 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:25:35,099 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:25:35,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:25:35,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:25:35,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:25:35,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:25:35,518 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:25:35,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-10-23 18:25:35,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ddc7f92/786ccff5a35d484ea123d50a417cf426/FLAG6afbe0ae4 [2020-10-23 18:25:36,172 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:25:36,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/mutex_lock_int.i [2020-10-23 18:25:36,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ddc7f92/786ccff5a35d484ea123d50a417cf426/FLAG6afbe0ae4 [2020-10-23 18:25:36,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ddc7f92/786ccff5a35d484ea123d50a417cf426 [2020-10-23 18:25:36,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:25:36,529 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:25:36,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:25:36,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:25:36,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:25:36,540 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761faaa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36, skipping insertion in model container [2020-10-23 18:25:36,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:25:36,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:25:36,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:25:36,766 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:25:36,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:25:36,794 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:25:36,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36 WrapperNode [2020-10-23 18:25:36,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:25:36,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:25:36,796 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:25:36,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:25:36,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (1/1) ... [2020-10-23 18:25:36,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:25:36,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:25:36,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:25:36,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:25:36,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (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 [2020-10-23 18:25:36,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:25:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:25:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:25:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-10-23 18:25:36,930 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2020-10-23 18:25:36,930 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2020-10-23 18:25:36,930 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:25:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:25:36,930 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:25:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:25:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:25:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-10-23 18:25:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2020-10-23 18:25:36,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:25:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:25:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2020-10-23 18:25:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:25:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:25:36,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:25:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:25:36,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:25:37,251 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:25:37,251 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:25:37,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:25:37 BoogieIcfgContainer [2020-10-23 18:25:37,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:25:37,257 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:25:37,257 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:25:37,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:25:37,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:25:36" (1/3) ... [2020-10-23 18:25:37,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f573e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:25:37, skipping insertion in model container [2020-10-23 18:25:37,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:25:36" (2/3) ... [2020-10-23 18:25:37,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f573e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:25:37, skipping insertion in model container [2020-10-23 18:25:37,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:25:37" (3/3) ... [2020-10-23 18:25:37,266 INFO L111 eAbstractionObserver]: Analyzing ICFG mutex_lock_int.i [2020-10-23 18:25:37,303 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:25:37,311 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:25:37,330 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:25:37,373 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:25:37,373 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:25:37,374 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:25:37,374 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:25:37,374 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:25:37,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:25:37,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:25:37,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:25:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-10-23 18:25:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-23 18:25:37,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:37,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:25:37,403 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1210577418, now seen corresponding path program 1 times [2020-10-23 18:25:37,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:37,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931623302] [2020-10-23 18:25:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:37,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:25:37,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:25:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:25:37,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931623302] [2020-10-23 18:25:37,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:25:37,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:25:37,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403774362] [2020-10-23 18:25:37,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:25:37,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:25:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:25:37,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:25:37,811 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 6 states. [2020-10-23 18:25:38,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:25:38,155 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-10-23 18:25:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:25:38,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-23 18:25:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:25:38,165 INFO L225 Difference]: With dead ends: 45 [2020-10-23 18:25:38,166 INFO L226 Difference]: Without dead ends: 19 [2020-10-23 18:25:38,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:25:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-23 18:25:38,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-23 18:25:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-23 18:25:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2020-10-23 18:25:38,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 12 [2020-10-23 18:25:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:25:38,217 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2020-10-23 18:25:38,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:25:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2020-10-23 18:25:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-23 18:25:38,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:25:38,218 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:25:38,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:25:38,219 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:25:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:25:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash 110801358, now seen corresponding path program 1 times [2020-10-23 18:25:38,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:25:38,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818755762] [2020-10-23 18:25:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:25:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:25:38,252 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:25:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 18:25:38,276 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 18:25:38,307 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 18:25:38,307 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 18:25:38,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:25:38,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:25:38 BoogieIcfgContainer [2020-10-23 18:25:38,362 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:25:38,368 INFO L168 Benchmark]: Toolchain (without parser) took 1840.60 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 86.2 MB in the end (delta: 40.5 MB). Peak memory consumption was 41.3 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:38,369 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:25:38,371 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.70 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:38,373 INFO L168 Benchmark]: Boogie Preprocessor took 35.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:38,374 INFO L168 Benchmark]: RCFGBuilder took 422.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 101.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:38,376 INFO L168 Benchmark]: TraceAbstraction took 1105.28 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 86.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:25:38,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 122.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 260.70 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 116.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 422.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 101.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1105.28 ms. Allocated memory is still 151.0 MB. Free memory was 101.5 MB in the beginning and 86.2 MB in the end (delta: 15.3 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L32] int m; [L33] m = 0 VAL [m={3:0}] [L35] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=0, a={3:0}, a={3:0}] [L20] COND FALSE !(*a == 1) [L21] *a = 1 VAL [a={3:0}, a={3:0}] [L35] RET mutex_lock(&m) VAL [m={3:0}] [L39] CALL mutex_lock(&m) VAL [a={3:0}] [L20] EXPR \read(*a) VAL [\read(*a)=1, a={3:0}, a={3:0}] [L20] COND TRUE *a == 1 [L20] CALL err() [L16] CALL reach_error() [L3] __assert_fail("0", "mutex_lock_int.i", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 33 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: 17 SDtfs, 8 SDslu, 41 SDs, 0 SdLazy, 38 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 0.2s InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 605 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...