/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/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:12:30,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:12:30,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:12:30,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:12:30,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:12:30,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:12:30,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:12:30,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:12:30,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:12:30,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:12:30,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:12:30,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:12:30,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:12:30,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:12:30,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:12:30,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:12:30,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:12:30,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:12:30,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:12:30,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:12:30,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:12:30,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:12:30,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:12:30,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:12:30,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:12:30,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:12:30,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:12:30,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:12:30,765 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 16:12:30,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:12:30,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:12:30,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:12:30,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:12:30,813 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:12:30,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:12:30,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:12:30,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:12:30,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:12:30,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:12:30,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:12:30,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:12:30,816 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:12:30,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:12:30,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:12:30,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:12:30,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:12:30,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:12:30,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:12:30,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:12:30,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:12:30,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:12:30,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:12:30,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:12:30,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:12:30,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:12:31,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:12:31,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:12:31,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:12:31,256 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:12:31,257 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:12:31,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test28-1.c [2021-01-06 16:12:31,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/301fa65d1/8c8c9757721c4dcab159aeeae797aa9f/FLAGcde08231d [2021-01-06 16:12:31,895 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:12:31,896 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/ldv-regression/test28-1.c [2021-01-06 16:12:31,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/301fa65d1/8c8c9757721c4dcab159aeeae797aa9f/FLAGcde08231d [2021-01-06 16:12:32,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/301fa65d1/8c8c9757721c4dcab159aeeae797aa9f [2021-01-06 16:12:32,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:12:32,307 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:12:32,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:32,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:12:32,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:12:32,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4102a26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32, skipping insertion in model container [2021-01-06 16:12:32,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:12:32,342 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]]] [2021-01-06 16:12:32,501 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/test28-1.c[576,589] [2021-01-06 16:12:32,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:32,516 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~pd~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~pd~0,],offset]]]] [2021-01-06 16:12:32,535 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/test28-1.c[576,589] [2021-01-06 16:12:32,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:12:32,552 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:12:32,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32 WrapperNode [2021-01-06 16:12:32,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:12:32,554 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:32,554 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:12:32,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:12:32,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:12:32,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:12:32,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:12:32,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:12:32,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (1/1) ... [2021-01-06 16:12:32,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:12:32,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:12:32,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:12:32,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:12:32,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (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 16:12:32,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:12:32,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:12:32,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:12:32,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:12:32,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:12:32,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:12:32,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:12:33,004 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:12:33,005 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 16:12:33,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:33 BoogieIcfgContainer [2021-01-06 16:12:33,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:12:33,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:12:33,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:12:33,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:12:33,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:12:32" (1/3) ... [2021-01-06 16:12:33,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bef609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:33, skipping insertion in model container [2021-01-06 16:12:33,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:12:32" (2/3) ... [2021-01-06 16:12:33,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bef609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:12:33, skipping insertion in model container [2021-01-06 16:12:33,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:33" (3/3) ... [2021-01-06 16:12:33,017 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2021-01-06 16:12:33,024 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:12:33,029 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:12:33,054 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:12:33,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:12:33,086 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:12:33,086 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:12:33,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:12:33,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:12:33,087 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:12:33,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:12:33,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:12:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 16:12:33,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:12:33,183 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:33,183 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:33,184 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash -594068692, now seen corresponding path program 1 times [2021-01-06 16:12:33,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:33,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135683241] [2021-01-06 16:12:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:33,447 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 16:12:33,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135683241] [2021-01-06 16:12:33,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:33,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:12:33,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578026272] [2021-01-06 16:12:33,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:12:33,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:12:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:12:33,475 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2021-01-06 16:12:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:33,593 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2021-01-06 16:12:33,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:12:33,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 16:12:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:33,605 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:12:33,605 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:12:33,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:12:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:12:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-01-06 16:12:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:12:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-01-06 16:12:33,643 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2021-01-06 16:12:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:33,644 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-01-06 16:12:33,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:12:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-01-06 16:12:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:12:33,645 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:33,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:33,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:12:33,646 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:33,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash -592221650, now seen corresponding path program 1 times [2021-01-06 16:12:33,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:33,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123852690] [2021-01-06 16:12:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:12:33,753 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 16:12:33,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123852690] [2021-01-06 16:12:33,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:12:33,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-06 16:12:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572433205] [2021-01-06 16:12:33,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:12:33,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:12:33,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:12:33,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:12:33,758 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2021-01-06 16:12:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:12:33,946 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-01-06 16:12:33,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:12:33,947 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 16:12:33,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:12:33,947 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:12:33,948 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:12:33,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:12:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:12:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:12:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:12:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2021-01-06 16:12:33,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 9 [2021-01-06 16:12:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:12:33,952 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2021-01-06 16:12:33,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:12:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2021-01-06 16:12:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:12:33,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:12:33,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:12:33,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:12:33,954 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:12:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:12:33,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1180938670, now seen corresponding path program 1 times [2021-01-06 16:12:33,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:12:33,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474469004] [2021-01-06 16:12:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:12:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:33,978 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:12:33,998 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:12:34,020 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:12:34,020 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:12:34,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:12:34,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:12:34 BoogieIcfgContainer [2021-01-06 16:12:34,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:12:34,051 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:12:34,051 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:12:34,052 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:12:34,052 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:12:33" (3/4) ... [2021-01-06 16:12:34,054 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:12:34,098 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test28-1.c-witness.graphml [2021-01-06 16:12:34,098 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:12:34,101 INFO L168 Benchmark]: Toolchain (without parser) took 1793.45 ms. Allocated memory is still 166.7 MB. Free memory was 141.7 MB in the beginning and 101.8 MB in the end (delta: 39.9 MB). Peak memory consumption was 39.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:34,102 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 166.7 MB. Free memory is still 139.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:12:34,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.49 ms. Allocated memory is still 166.7 MB. Free memory was 141.4 MB in the beginning and 132.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:34,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.13 ms. Allocated memory is still 166.7 MB. Free memory was 131.9 MB in the beginning and 130.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:34,105 INFO L168 Benchmark]: Boogie Preprocessor took 22.36 ms. Allocated memory is still 166.7 MB. Free memory was 130.5 MB in the beginning and 129.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:34,106 INFO L168 Benchmark]: RCFGBuilder took 392.43 ms. Allocated memory is still 166.7 MB. Free memory was 129.4 MB in the beginning and 116.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:34,107 INFO L168 Benchmark]: TraceAbstraction took 1041.52 ms. Allocated memory is still 166.7 MB. Free memory was 116.1 MB in the beginning and 103.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:34,107 INFO L168 Benchmark]: Witness Printer took 47.16 ms. Allocated memory is still 166.7 MB. Free memory was 103.9 MB in the beginning and 101.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:12:34,112 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 166.7 MB. Free memory is still 139.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.49 ms. Allocated memory is still 166.7 MB. Free memory was 141.4 MB in the beginning and 132.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 37.13 ms. Allocated memory is still 166.7 MB. Free memory was 131.9 MB in the beginning and 130.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.36 ms. Allocated memory is still 166.7 MB. Free memory was 130.5 MB in the beginning and 129.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 392.43 ms. Allocated memory is still 166.7 MB. Free memory was 129.4 MB in the beginning and 116.6 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1041.52 ms. Allocated memory is still 166.7 MB. Free memory was 116.1 MB in the beginning and 103.9 MB in the end (delta: 12.2 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * Witness Printer took 47.16 ms. Allocated memory is still 166.7 MB. Free memory was 103.9 MB in the beginning and 101.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] struct dummy d1, d2; [L15] int n = __VERIFIER_nondet_int(); [L16] EXPR n ? &d1 : &d2 [L16] struct dummy *pd = n ? &d1 : &d2; [L17] COND TRUE pd == &d2 [L18] pd->a = 0 [L22] pd == &d2 && d2.b != 0 [L22] EXPR d2.b [L22] pd == &d2 && d2.b != 0 [L22] COND TRUE pd == &d2 && d2.b != 0 [L28] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 45 SDslu, 26 SDs, 0 SdLazy, 60 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 280 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...