/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:39:17,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:39:17,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:39:17,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:39:17,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:39:17,448 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:39:17,450 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:39:17,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:39:17,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:39:17,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:39:17,455 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:39:17,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:39:17,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:39:17,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:39:17,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:39:17,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:39:17,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:39:17,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:39:17,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:39:17,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:39:17,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:39:17,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:39:17,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:39:17,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:39:17,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 16:39:17,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:39:17,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:39:17,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:39:17,479 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:39:17,480 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:39:17,480 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:39:17,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:39:17,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:39:17,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:39:17,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:39:17,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:39:17,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:39:17,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:39:17,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:39:17,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:39:17,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:39:17,509 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:39:17,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:39:17,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:39:17,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:39:17,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:39:17,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:39:17,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:39:17,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:39:17,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:39:17,511 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:39:17,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:39:17,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:39:17,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:39:17,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:39:17,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:39:17,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:39:17,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:39:17,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:17,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:39:17,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:39:17,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:39:17,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:39:17,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:39:17,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:39:17,514 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:39:17,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:39:17,865 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:39:17,883 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:39:17,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:39:17,894 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:39:17,895 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:39:17,895 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-08-21 16:39:17,966 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1975bd443/6de62eebdd06488eaad32f5bae9c0f51/FLAGfe9acc3cd [2020-08-21 16:39:18,388 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:39:18,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/nec20.c [2020-08-21 16:39:18,395 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1975bd443/6de62eebdd06488eaad32f5bae9c0f51/FLAGfe9acc3cd [2020-08-21 16:39:18,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1975bd443/6de62eebdd06488eaad32f5bae9c0f51 [2020-08-21 16:39:18,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:39:18,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:39:18,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:18,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:39:18,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:39:18,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:18" (1/1) ... [2020-08-21 16:39:18,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dccfc7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:18, skipping insertion in model container [2020-08-21 16:39:18,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:39:18" (1/1) ... [2020-08-21 16:39:18,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:39:18,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:39:19,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:19,073 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:39:19,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:39:19,106 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:39:19,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19 WrapperNode [2020-08-21 16:39:19,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:39:19,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:39:19,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:39:19,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:39:19,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... [2020-08-21 16:39:19,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... [2020-08-21 16:39:19,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... [2020-08-21 16:39:19,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... [2020-08-21 16:39:19,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... [2020-08-21 16:39:19,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... [2020-08-21 16:39:19,223 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... [2020-08-21 16:39:19,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:39:19,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:39:19,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:39:19,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:39:19,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:39:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:39:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:39:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 16:39:19,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:39:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:39:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 16:39:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 16:39:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-21 16:39:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:39:19,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:39:19,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:39:19,500 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:39:19,500 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:39:19,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:19 BoogieIcfgContainer [2020-08-21 16:39:19,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:39:19,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:39:19,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:39:19,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:39:19,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:39:18" (1/3) ... [2020-08-21 16:39:19,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d49f5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:19, skipping insertion in model container [2020-08-21 16:39:19,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:39:19" (2/3) ... [2020-08-21 16:39:19,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d49f5fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:39:19, skipping insertion in model container [2020-08-21 16:39:19,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:39:19" (3/3) ... [2020-08-21 16:39:19,513 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-08-21 16:39:19,523 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:39:19,530 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:39:19,542 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:39:19,561 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:39:19,561 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:39:19,562 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:39:19,562 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:39:19,562 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:39:19,562 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:39:19,562 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:39:19,562 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:39:19,579 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-21 16:39:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 16:39:19,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:19,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:19,587 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:19,593 INFO L82 PathProgramCache]: Analyzing trace with hash -676339564, now seen corresponding path program 1 times [2020-08-21 16:39:19,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:19,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514139334] [2020-08-21 16:39:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:19,925 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2020-08-21 16:39:19,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:19,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514139334] [2020-08-21 16:39:19,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:19,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:39:19,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211008574] [2020-08-21 16:39:19,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:19,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:19,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:19,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:19,982 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-08-21 16:39:20,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:20,204 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2020-08-21 16:39:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:39:20,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-21 16:39:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:20,217 INFO L225 Difference]: With dead ends: 53 [2020-08-21 16:39:20,217 INFO L226 Difference]: Without dead ends: 22 [2020-08-21 16:39:20,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-21 16:39:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-08-21 16:39:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 16:39:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-08-21 16:39:20,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-08-21 16:39:20,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:20,257 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-08-21 16:39:20,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-08-21 16:39:20,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 16:39:20,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:20,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:20,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:39:20,260 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:20,260 INFO L82 PathProgramCache]: Analyzing trace with hash 3718806, now seen corresponding path program 1 times [2020-08-21 16:39:20,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:20,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127476935] [2020-08-21 16:39:20,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:20,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:39:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:39:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:39:20,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127476935] [2020-08-21 16:39:20,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:39:20,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:39:20,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318373876] [2020-08-21 16:39:20,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:39:20,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:39:20,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:39:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:39:20,427 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-08-21 16:39:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:39:20,550 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-08-21 16:39:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:39:20,551 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-21 16:39:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:39:20,553 INFO L225 Difference]: With dead ends: 29 [2020-08-21 16:39:20,554 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 16:39:20,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:39:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 16:39:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2020-08-21 16:39:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-21 16:39:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-08-21 16:39:20,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-08-21 16:39:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:39:20,565 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-08-21 16:39:20,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:39:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-08-21 16:39:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 16:39:20,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:39:20,566 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:39:20,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:39:20,567 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:39:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:39:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2087974871, now seen corresponding path program 1 times [2020-08-21 16:39:20,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:39:20,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281096681] [2020-08-21 16:39:20,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:39:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:39:20,592 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:39:20,592 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:39:20,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:39:20,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:39:20 BoogieIcfgContainer [2020-08-21 16:39:20,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:39:20,616 INFO L168 Benchmark]: Toolchain (without parser) took 1802.70 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 102.7 MB in the beginning and 101.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:20,617 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:39:20,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.16 ms. Allocated memory is still 146.8 MB. Free memory was 102.5 MB in the beginning and 92.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:20,619 INFO L168 Benchmark]: Boogie Preprocessor took 117.79 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.6 MB in the beginning and 180.0 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:20,620 INFO L168 Benchmark]: RCFGBuilder took 279.41 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 167.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:20,621 INFO L168 Benchmark]: TraceAbstraction took 1107.41 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 101.3 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:39:20,626 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.16 ms. Allocated memory is still 146.8 MB. Free memory was 102.5 MB in the beginning and 92.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.79 ms. Allocated memory was 146.8 MB in the beginning and 202.4 MB in the end (delta: 55.6 MB). Free memory was 92.6 MB in the beginning and 180.0 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 279.41 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 167.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1107.41 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 101.3 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; [L13] _Bool k=__VERIFIER_nondet_bool(); [L14] unsigned int i,n,j; [L15] int a[1025]; [L17] COND TRUE \read(k) [L18] n=0 [L23] i=0 [L24] j=__VERIFIER_nondet_uint() [L25] COND FALSE !(j > 10000) [L28] COND TRUE i <= n [L29] i++ [L30] j= j +2 [L28] COND FALSE !(i <= n) [L33] a[i]=0 [L34] CALL __VERIFIER_assert(j<1025) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 SDtfs, 53 SDslu, 37 SDs, 0 SdLazy, 86 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 1792 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...