/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/nec11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:15:47,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:15:47,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:15:47,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:15:47,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:15:47,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:15:47,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:15:47,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:15:47,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:15:47,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:15:47,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:15:47,427 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:15:47,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:15:47,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:15:47,433 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:15:47,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:15:47,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:15:47,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:15:47,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:15:47,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:15:47,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:15:47,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:15:47,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:15:47,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:15:47,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:15:47,467 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 12:15:47,468 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 12:15:47,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 12:15:47,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 12:15:47,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 12:15:47,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 12:15:47,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 12:15:47,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 12:15:47,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:15:47,473 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:15:47,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:15:47,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:15:47,511 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:15:47,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:15:47,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:15:47,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:15:47,516 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:15:47,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:15:47,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:15:47,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:15:47,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:15:47,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:15:47,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:15:47,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:15:47,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:15:47,518 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:15:47,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:15:47,520 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:15:47,520 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:15:47,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:15:47,520 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:15:47,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:15:47,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:15:47,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:47,521 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:15:47,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:15:47,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:15:47,522 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:15:47,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:15:47,522 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:15:47,522 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:15:47,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:15:47,799 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:15:47,816 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:15:47,820 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:15:47,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:15:47,821 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:15:47,823 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec11.c [2020-07-17 12:15:47,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d5ffcb9/81c2d54ceafe43c0b9f88d6090cf59be/FLAGb881cbe76 [2020-07-17 12:15:48,302 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:15:48,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec11.c [2020-07-17 12:15:48,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d5ffcb9/81c2d54ceafe43c0b9f88d6090cf59be/FLAGb881cbe76 [2020-07-17 12:15:48,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9d5ffcb9/81c2d54ceafe43c0b9f88d6090cf59be [2020-07-17 12:15:48,749 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:15:48,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:15:48,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:48,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:15:48,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:15:48,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:48,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5250d0bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48, skipping insertion in model container [2020-07-17 12:15:48,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:48,772 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:15:48,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:15:48,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:48,964 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:15:48,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:48,990 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:15:48,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48 WrapperNode [2020-07-17 12:15:48,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:48,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:15:48,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:15:48,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:15:49,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:49,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:49,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:49,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:49,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:49,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:49,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... [2020-07-17 12:15:49,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:15:49,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:15:49,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:15:49,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:15:49,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:49,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:15:49,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:15:49,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:15:49,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:15:49,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:15:49,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:15:49,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-17 12:15:49,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:15:49,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:15:49,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:15:49,443 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:15:49,444 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 12:15:49,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:49 BoogieIcfgContainer [2020-07-17 12:15:49,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:15:49,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:15:49,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:15:49,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:15:49,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:15:48" (1/3) ... [2020-07-17 12:15:49,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ff94f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:49, skipping insertion in model container [2020-07-17 12:15:49,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:48" (2/3) ... [2020-07-17 12:15:49,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62ff94f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:49, skipping insertion in model container [2020-07-17 12:15:49,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:49" (3/3) ... [2020-07-17 12:15:49,467 INFO L109 eAbstractionObserver]: Analyzing ICFG nec11.c [2020-07-17 12:15:49,478 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:15:49,484 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:15:49,497 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:15:49,517 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:15:49,518 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:15:49,518 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:15:49,518 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:15:49,518 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:15:49,518 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:15:49,518 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:15:49,519 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:15:49,538 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-17 12:15:49,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:15:49,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:49,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:49,546 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:49,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2020-07-17 12:15:49,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:49,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857034099] [2020-07-17 12:15:49,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:49,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857034099] [2020-07-17 12:15:49,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:49,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 12:15:49,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93586528] [2020-07-17 12:15:49,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 12:15:49,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 12:15:49,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:15:49,719 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-17 12:15:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:49,746 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-07-17 12:15:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 12:15:49,748 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-17 12:15:49,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:49,757 INFO L225 Difference]: With dead ends: 32 [2020-07-17 12:15:49,757 INFO L226 Difference]: Without dead ends: 13 [2020-07-17 12:15:49,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 12:15:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-07-17 12:15:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-07-17 12:15:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-07-17 12:15:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-07-17 12:15:49,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-07-17 12:15:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:49,806 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-07-17 12:15:49,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 12:15:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-07-17 12:15:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-17 12:15:49,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:49,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:49,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:15:49,808 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:49,809 INFO L82 PathProgramCache]: Analyzing trace with hash -158041290, now seen corresponding path program 1 times [2020-07-17 12:15:49,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:49,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440164802] [2020-07-17 12:15:49,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 12:15:49,864 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-17 12:15:49,864 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 12:15:49,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:15:49,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:15:49 BoogieIcfgContainer [2020-07-17 12:15:49,886 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:15:49,889 INFO L168 Benchmark]: Toolchain (without parser) took 1137.05 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 103.6 MB in the beginning and 149.4 MB in the end (delta: -45.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:49,890 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:15:49,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.52 ms. Allocated memory is still 146.8 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:49,892 INFO L168 Benchmark]: Boogie Preprocessor took 114.29 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.8 MB in the beginning and 183.2 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:49,893 INFO L168 Benchmark]: RCFGBuilder took 343.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 170.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:49,894 INFO L168 Benchmark]: TraceAbstraction took 434.86 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 149.4 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:49,898 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 146.8 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 237.52 ms. Allocated memory is still 146.8 MB. Free memory was 103.2 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.29 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 93.8 MB in the beginning and 183.2 MB in the end (delta: -89.4 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 343.16 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 170.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 434.86 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 149.4 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int a[5]; [L14] int len=0; [L15] _Bool c=__VERIFIER_nondet_bool(); [L16] int i; VAL [c=0, len=0] [L19] COND FALSE !(\read(c)) VAL [c=0, len=0] [L28] CALL __VERIFIER_assert(len==5) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...