/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/nec11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:45:54,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:45:54,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:45:54,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 21:45:54,642 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 21:45:54,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 21:45:54,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 21:45:54,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 21:45:54,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 21:45:54,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 21:45:54,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 21:45:54,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 21:45:54,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:45:54,657 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:45:54,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:45:54,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:45:54,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:45:54,662 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:45:54,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:45:54,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:45:54,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:45:54,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:45:54,672 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:45:54,673 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:45:54,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:45:54,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:45:54,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:45:54,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:45:54,691 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:45:54,709 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:45:54,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:45:54,712 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:45:54,712 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:45:54,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:45:54,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:45:54,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:45:54,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:45:54,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:45:54,716 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:45:54,716 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:45:54,716 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:45:54,717 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:45:54,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:45:54,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:45:54,718 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:45:54,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:45:54,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:45:54,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:54,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:45:54,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:45:54,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:45:54,720 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:45:55,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:45:55,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:45:55,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:45:55,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:45:55,212 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:45:55,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec11.c [2020-10-23 21:45:55,311 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799a5db1a/f82845c08c144b5281d22cd3314491b7/FLAGe9c9b5f3e [2020-10-23 21:45:56,027 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:45:56,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec11.c [2020-10-23 21:45:56,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799a5db1a/f82845c08c144b5281d22cd3314491b7/FLAGe9c9b5f3e [2020-10-23 21:45:56,390 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/799a5db1a/f82845c08c144b5281d22cd3314491b7 [2020-10-23 21:45:56,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:45:56,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:45:56,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:56,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:45:56,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:45:56,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,416 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d7b5367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56, skipping insertion in model container [2020-10-23 21:45:56,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:45:56,442 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:45:56,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:56,626 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:45:56,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:56,662 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:45:56,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56 WrapperNode [2020-10-23 21:45:56,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:56,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:45:56,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:45:56,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:45:56,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,688 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... [2020-10-23 21:45:56,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:45:56,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:45:56,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:45:56,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:45:56,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:56,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:45:56,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:45:56,796 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:45:56,796 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:45:56,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:45:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:45:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:45:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:45:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:45:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:45:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 21:45:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:45:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:45:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:45:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:45:56,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:45:56,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:45:56,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:45:57,101 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:45:57,102 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:45:57,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:57 BoogieIcfgContainer [2020-10-23 21:45:57,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:45:57,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:45:57,107 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:45:57,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:45:57,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:45:56" (1/3) ... [2020-10-23 21:45:57,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594a68ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:57, skipping insertion in model container [2020-10-23 21:45:57,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:56" (2/3) ... [2020-10-23 21:45:57,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594a68ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:57, skipping insertion in model container [2020-10-23 21:45:57,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:57" (3/3) ... [2020-10-23 21:45:57,125 INFO L111 eAbstractionObserver]: Analyzing ICFG nec11.c [2020-10-23 21:45:57,152 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:45:57,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:45:57,195 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:45:57,238 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:45:57,239 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:45:57,239 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:45:57,240 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:45:57,240 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:45:57,240 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:45:57,241 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:45:57,241 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:45:57,263 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-23 21:45:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 21:45:57,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:57,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:45:57,277 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:57,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1758770936, now seen corresponding path program 1 times [2020-10-23 21:45:57,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:57,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93588000] [2020-10-23 21:45:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:57,377 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:57,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:57,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93588000] [2020-10-23 21:45:57,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:57,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:45:57,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846702962] [2020-10-23 21:45:57,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:45:57,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:45:57,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:45:57,607 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-23 21:45:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:57,705 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2020-10-23 21:45:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:45:57,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 21:45:57,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:57,716 INFO L225 Difference]: With dead ends: 53 [2020-10-23 21:45:57,716 INFO L226 Difference]: Without dead ends: 30 [2020-10-23 21:45:57,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:45:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-23 21:45:57,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-23 21:45:57,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-23 21:45:57,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-23 21:45:57,770 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-10-23 21:45:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:57,770 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-23 21:45:57,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:45:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-23 21:45:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 21:45:57,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:57,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:45:57,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:45:57,773 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:57,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:57,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1329333671, now seen corresponding path program 1 times [2020-10-23 21:45:57,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:57,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653734246] [2020-10-23 21:45:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:57,778 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:45:57,811 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:45:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:45:57,836 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:45:57,869 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:45:57,869 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:45:57,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:45:57,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:45:57 BoogieIcfgContainer [2020-10-23 21:45:57,889 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:45:57,895 INFO L168 Benchmark]: Toolchain (without parser) took 1494.05 ms. Allocated memory is still 159.4 MB. Free memory was 136.0 MB in the beginning and 107.8 MB in the end (delta: 28.2 MB). Peak memory consumption was 29.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:57,895 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 125.8 MB. Free memory is still 107.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:45:57,899 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.04 ms. Allocated memory is still 159.4 MB. Free memory was 135.5 MB in the beginning and 126.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:57,901 INFO L168 Benchmark]: Boogie Preprocessor took 38.88 ms. Allocated memory is still 159.4 MB. Free memory was 126.4 MB in the beginning and 124.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:57,902 INFO L168 Benchmark]: RCFGBuilder took 400.63 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 142.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:57,903 INFO L168 Benchmark]: TraceAbstraction took 782.58 ms. Allocated memory is still 159.4 MB. Free memory was 141.9 MB in the beginning and 107.8 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:45:57,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 125.8 MB. Free memory is still 107.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.04 ms. Allocated memory is still 159.4 MB. Free memory was 135.5 MB in the beginning and 126.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.88 ms. Allocated memory is still 159.4 MB. Free memory was 126.4 MB in the beginning and 124.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 400.63 ms. Allocated memory is still 159.4 MB. Free memory was 124.8 MB in the beginning and 142.4 MB in the end (delta: -17.6 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 782.58 ms. Allocated memory is still 159.4 MB. Free memory was 141.9 MB in the beginning and 107.8 MB in the end (delta: 34.1 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] int a[5]; [L16] int len=0; [L17] _Bool c=__VERIFIER_nondet_bool(); [L18] int i; [L21] COND FALSE !(\read(c)) [L30] CALL __VERIFIER_assert(len==5) [L6] COND TRUE !(cond) [L7] CALL reach_error() [L3] __assert_fail("0", "nec11.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 21 SDslu, 4 SDs, 0 SdLazy, 9 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: No data available, 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...