/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-regression/stateful_check.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:12:02,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:12:02,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:12:03,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:12:03,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:12:03,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:12:03,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:12:03,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:12:03,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:12:03,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:12:03,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:12:03,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:12:03,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:12:03,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:12:03,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:12:03,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:12:03,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:12:03,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:12:03,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:12:03,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:12:03,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:12:03,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:12:03,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:12:03,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:12:03,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:12:03,091 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:12:03,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:12:03,094 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:12:03,095 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:12:03,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:12:03,096 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:12:03,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:12:03,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:12:03,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:12:03,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:12:03,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:12:03,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:12:03,159 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:12:03,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:12:03,163 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:12:03,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:12:03,164 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:12:03,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:12:03,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:12:03,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:12:03,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:12:03,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:12:03,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:12:03,167 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:12:03,167 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:12:03,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:12:03,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:12:03,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:12:03,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:12:03,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:03,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:12:03,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:12:03,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:12:03,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:12:03,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:12:03,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:12:03,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:12:03,187 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:12:03,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:12:03,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:12:03,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:12:03,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:12:03,671 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:12:03,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/stateful_check.c [2021-01-06 16:12:03,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2827cef25/6ac0fe6f2b3d401d9b936c322761a74b/FLAGb56ac15df [2021-01-06 16:12:04,307 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:12:04,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/stateful_check.c [2021-01-06 16:12:04,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2827cef25/6ac0fe6f2b3d401d9b936c322761a74b/FLAGb56ac15df [2021-01-06 16:12:04,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2827cef25/6ac0fe6f2b3d401d9b936c322761a74b [2021-01-06 16:12:04,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:12:04,692 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:12:04,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:04,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:12:04,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:12:04,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:04" (1/1) ... [2021-01-06 16:12:04,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c368f01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:04, skipping insertion in model container [2021-01-06 16:12:04,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:04" (1/1) ... [2021-01-06 16:12:04,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:12:04,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:12:04,953 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] left hand side expression in assignment: lhs: VariableLHS[~ldv_mutex~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_mutex~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~open_called~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~open_called~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~open_called~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_s_misc_fops_file_operations~0,] [2021-01-06 16:12:05,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:05,054 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:12:05,080 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/stateful_check.c[298,311] left hand side expression in assignment: lhs: VariableLHS[~ldv_mutex~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_mutex~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~open_called~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~open_called~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~open_called~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~ldv_s_misc_fops_file_operations~0,] [2021-01-06 16:12:05,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:05,139 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:12:05,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05 WrapperNode [2021-01-06 16:12:05,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:05,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:05,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:12:05,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:12:05,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:05,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:12:05,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:12:05,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:12:05,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... [2021-01-06 16:12:05,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:12:05,273 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:12:05,273 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:12:05,273 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:12:05,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 16:12:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:12:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:12:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:12:05,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:12:05,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:12:05,728 INFO L299 CfgBuilder]: Removed 35 assume(true) statements. [2021-01-06 16:12:05,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:05 BoogieIcfgContainer [2021-01-06 16:12:05,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:12:05,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:12:05,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:12:05,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:12:05,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:12:04" (1/3) ... [2021-01-06 16:12:05,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1416e46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:05, skipping insertion in model container [2021-01-06 16:12:05,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:05" (2/3) ... [2021-01-06 16:12:05,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1416e46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:05, skipping insertion in model container [2021-01-06 16:12:05,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:05" (3/3) ... [2021-01-06 16:12:05,761 INFO L111 eAbstractionObserver]: Analyzing ICFG stateful_check.c [2021-01-06 16:12:05,779 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:12:05,792 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-01-06 16:12:05,838 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-01-06 16:12:05,869 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:12:05,870 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:12:05,870 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:12:05,870 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:12:05,870 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:12:05,870 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:12:05,871 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:12:05,871 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:12:05,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-01-06 16:12:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:12:05,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:05,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:12:05,905 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:05,913 INFO L82 PathProgramCache]: Analyzing trace with hash 889605129, now seen corresponding path program 1 times [2021-01-06 16:12:05,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:05,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395368988] [2021-01-06 16:12:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:06,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395368988] [2021-01-06 16:12:06,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:06,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:12:06,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948685580] [2021-01-06 16:12:06,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:12:06,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:12:06,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:12:06,103 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2021-01-06 16:12:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:06,124 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2021-01-06 16:12:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:12:06,126 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:12:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:06,136 INFO L225 Difference]: With dead ends: 89 [2021-01-06 16:12:06,136 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:12:06,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:12:06,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:12:06,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 16:12:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 16:12:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-01-06 16:12:06,177 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 6 [2021-01-06 16:12:06,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:06,178 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-01-06 16:12:06,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:12:06,178 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-01-06 16:12:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:12:06,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:06,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:06,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:12:06,179 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:06,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1804046918, now seen corresponding path program 1 times [2021-01-06 16:12:06,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:06,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378460404] [2021-01-06 16:12:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:06,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378460404] [2021-01-06 16:12:06,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:06,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:12:06,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019889027] [2021-01-06 16:12:06,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:12:06,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:06,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:12:06,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:06,242 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 3 states. [2021-01-06 16:12:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:06,295 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-01-06 16:12:06,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:12:06,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-01-06 16:12:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:06,298 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:12:06,298 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 16:12:06,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 16:12:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 16:12:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 16:12:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-01-06 16:12:06,312 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 7 [2021-01-06 16:12:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:06,312 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-01-06 16:12:06,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:12:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-01-06 16:12:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:12:06,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:06,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:06,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:12:06,315 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:06,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:06,316 INFO L82 PathProgramCache]: Analyzing trace with hash -147365405, now seen corresponding path program 1 times [2021-01-06 16:12:06,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:06,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753406084] [2021-01-06 16:12:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:06,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753406084] [2021-01-06 16:12:06,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:06,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:12:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116905623] [2021-01-06 16:12:06,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:12:06,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:12:06,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:06,380 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 3 states. [2021-01-06 16:12:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:06,455 INFO L93 Difference]: Finished difference Result 150 states and 212 transitions. [2021-01-06 16:12:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:12:06,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 16:12:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:06,457 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:12:06,457 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:12:06,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:06,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:12:06,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2021-01-06 16:12:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 16:12:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2021-01-06 16:12:06,480 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 15 [2021-01-06 16:12:06,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:06,480 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2021-01-06 16:12:06,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:12:06,480 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2021-01-06 16:12:06,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:12:06,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:06,482 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] [2021-01-06 16:12:06,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:12:06,482 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1293798555, now seen corresponding path program 1 times [2021-01-06 16:12:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:06,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118497564] [2021-01-06 16:12:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:12:06,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118497564] [2021-01-06 16:12:06,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:06,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:12:06,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65672840] [2021-01-06 16:12:06,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:12:06,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:06,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:12:06,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:06,548 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand 3 states. [2021-01-06 16:12:06,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:06,579 INFO L93 Difference]: Finished difference Result 208 states and 296 transitions. [2021-01-06 16:12:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:12:06,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2021-01-06 16:12:06,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:06,582 INFO L225 Difference]: With dead ends: 208 [2021-01-06 16:12:06,582 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 16:12:06,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:12:06,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 16:12:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2021-01-06 16:12:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-01-06 16:12:06,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 175 transitions. [2021-01-06 16:12:06,601 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 175 transitions. Word has length 22 [2021-01-06 16:12:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:06,602 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 175 transitions. [2021-01-06 16:12:06,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:12:06,602 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 175 transitions. [2021-01-06 16:12:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 16:12:06,603 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:06,604 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] [2021-01-06 16:12:06,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:12:06,604 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1319564790, now seen corresponding path program 1 times [2021-01-06 16:12:06,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:06,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334619076] [2021-01-06 16:12:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:06,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334619076] [2021-01-06 16:12:06,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734198277] [2021-01-06 16:12:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:06,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:12:06,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:12:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:12:06,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:12:06,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:12:06,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611262275] [2021-01-06 16:12:06,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:12:06,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:06,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:12:06,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:12:06,893 INFO L87 Difference]: Start difference. First operand 121 states and 175 transitions. Second operand 5 states. [2021-01-06 16:12:07,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:07,006 INFO L93 Difference]: Finished difference Result 344 states and 525 transitions. [2021-01-06 16:12:07,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:12:07,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 16:12:07,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:07,010 INFO L225 Difference]: With dead ends: 344 [2021-01-06 16:12:07,010 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 16:12:07,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:12:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 16:12:07,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 217. [2021-01-06 16:12:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 16:12:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 327 transitions. [2021-01-06 16:12:07,037 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 327 transitions. Word has length 22 [2021-01-06 16:12:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:07,037 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 327 transitions. [2021-01-06 16:12:07,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:12:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 327 transitions. [2021-01-06 16:12:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 16:12:07,039 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:07,039 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:07,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:12:07,254 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1040975168, now seen corresponding path program 1 times [2021-01-06 16:12:07,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:07,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661651879] [2021-01-06 16:12:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 16:12:07,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661651879] [2021-01-06 16:12:07,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:07,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:12:07,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399191372] [2021-01-06 16:12:07,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:12:07,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:07,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:12:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:12:07,319 INFO L87 Difference]: Start difference. First operand 217 states and 327 transitions. Second operand 4 states. [2021-01-06 16:12:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:07,383 INFO L93 Difference]: Finished difference Result 629 states and 979 transitions. [2021-01-06 16:12:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:12:07,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-01-06 16:12:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:07,386 INFO L225 Difference]: With dead ends: 629 [2021-01-06 16:12:07,387 INFO L226 Difference]: Without dead ends: 415 [2021-01-06 16:12:07,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:12:07,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-01-06 16:12:07,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 313. [2021-01-06 16:12:07,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2021-01-06 16:12:07,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 487 transitions. [2021-01-06 16:12:07,419 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 487 transitions. Word has length 29 [2021-01-06 16:12:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:07,420 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 487 transitions. [2021-01-06 16:12:07,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:12:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 487 transitions. [2021-01-06 16:12:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 16:12:07,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:07,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:07,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 16:12:07,423 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1446791270, now seen corresponding path program 1 times [2021-01-06 16:12:07,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:07,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330547326] [2021-01-06 16:12:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:07,454 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:07,500 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:07,542 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:12:07,543 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:12:07,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 16:12:07,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:12:07 BoogieIcfgContainer [2021-01-06 16:12:07,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:12:07,623 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:12:07,624 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:12:07,624 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:12:07,624 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:05" (3/4) ... [2021-01-06 16:12:07,627 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:12:07,686 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/stateful_check.c-witness.graphml [2021-01-06 16:12:07,687 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:12:07,689 INFO L168 Benchmark]: Toolchain (without parser) took 2998.02 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 94.8 MB in the end (delta: 31.9 MB). Peak memory consumption was 32.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:07,689 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:12:07,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 445.04 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:07,691 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.63 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:07,691 INFO L168 Benchmark]: Boogie Preprocessor took 55.76 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 113.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:07,692 INFO L168 Benchmark]: RCFGBuilder took 458.30 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 130.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:07,693 INFO L168 Benchmark]: TraceAbstraction took 1883.43 ms. Allocated memory is still 151.0 MB. Free memory was 130.6 MB in the beginning and 98.5 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:07,693 INFO L168 Benchmark]: Witness Printer took 63.20 ms. Allocated memory is still 151.0 MB. Free memory was 97.9 MB in the beginning and 94.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:07,697 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 127.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 445.04 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 116.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 65.63 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.76 ms. Allocated memory is still 151.0 MB. Free memory was 114.7 MB in the beginning and 113.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 458.30 ms. Allocated memory is still 151.0 MB. Free memory was 113.3 MB in the beginning and 130.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1883.43 ms. Allocated memory is still 151.0 MB. Free memory was 130.6 MB in the beginning and 98.5 MB in the end (delta: 32.2 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. * Witness Printer took 63.20 ms. Allocated memory is still 151.0 MB. Free memory was 97.9 MB in the beginning and 94.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] int ldv_mutex = 1; [L13] int open_called = 0; VAL [ldv_mutex=1, open_called=0] [L76] int ldv_s_misc_fops_file_operations = 0; [L71] open_called = 0 [L72] return 0; VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: VAL [ldv_mutex=1, open_called=0] [L83] COND TRUE ldv_s_misc_fops_file_operations==0 [L59] COND TRUE __VERIFIER_nondet_int() [L61] return 1; VAL [ldv_mutex=1, open_called=0] [L85] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: VAL [ldv_mutex=1, open_called=0] [L91] COND TRUE ldv_s_misc_fops_file_operations==1 [L54] return 0; VAL [ldv_mutex=1, open_called=0] [L93] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: VAL [ldv_mutex=1, open_called=0] [L99] COND TRUE ldv_s_misc_fops_file_operations==2 [L50] return 0; VAL [ldv_mutex=1, open_called=0] [L101] ldv_s_misc_fops_file_operations++ VAL [ldv_mutex=1, open_called=0] [L78] COND TRUE __VERIFIER_nondet_int() [L82] case 0: [L90] case 1: [L98] case 2: [L106] case 3: VAL [ldv_mutex=1, open_called=0] [L107] COND TRUE ldv_s_misc_fops_file_operations==3 [L36] COND FALSE !(\read(open_called)) VAL [ldv_mutex=1, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=1, open_called=0] [L19] ldv_mutex = 2 VAL [ldv_mutex=2, open_called=0] [L18] (ldv_mutex == 1) ? 0 : __blast_assert() VAL [ldv_mutex=2, open_called=0] [L6] reach_error() VAL [ldv_mutex=2, open_called=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 298 SDtfs, 164 SDslu, 289 SDs, 0 SdLazy, 92 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=313occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 117 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 160 NumberOfCodeBlocks, 160 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 116 ConstructedInterpolants, 0 QuantifiedInterpolants, 5084 SizeOfPredicates, 0 NumberOfNonLiveVariables, 85 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 14/20 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...