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/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:51:52,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:51:52,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:51:52,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 19:51:52,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:51:52,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:51:52,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:51:52,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:51:52,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:51:52,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:51:52,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:51:52,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:51:52,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:51:52,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:51:52,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:51:52,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:51:52,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:51:52,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:51:52,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:51:52,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:51:52,867 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 [2019-09-03 19:51:52,881 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:51:52,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:51:52,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:51:52,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:51:52,885 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:51:52,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:51:52,885 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:51:52,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:51:52,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:51:52,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:51:52,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:51:52,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:51:52,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:51:52,888 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:51:52,888 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:51:52,888 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:51:52,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:51:52,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:51:52,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:51:52,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:51:52,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:51:52,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:51:52,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:51:52,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:51:52,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:51:52,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:51:52,891 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:51:52,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:51:52,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:51:52,920 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:51:52,936 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:51:52,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:51:52,941 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:51:52,941 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:51:52,942 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2019-09-03 19:51:53,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650ec4aad/52616159c48e4230b3e33ef7f90438a0/FLAGc6994f0bf [2019-09-03 19:51:53,484 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:51:53,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2019-09-03 19:51:53,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650ec4aad/52616159c48e4230b3e33ef7f90438a0/FLAGc6994f0bf [2019-09-03 19:51:53,846 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/650ec4aad/52616159c48e4230b3e33ef7f90438a0 [2019-09-03 19:51:53,862 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:51:53,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:51:53,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:51:53,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:51:53,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:51:53,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:51:53" (1/1) ... [2019-09-03 19:51:53,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b49b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:53, skipping insertion in model container [2019-09-03 19:51:53,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:51:53" (1/1) ... [2019-09-03 19:51:53,883 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:51:53,905 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:51:54,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:51:54,155 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:51:54,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:51:54,193 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:51:54,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54 WrapperNode [2019-09-03 19:51:54,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:51:54,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:51:54,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:51:54,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:51:54,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (1/1) ... [2019-09-03 19:51:54,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (1/1) ... [2019-09-03 19:51:54,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (1/1) ... [2019-09-03 19:51:54,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (1/1) ... [2019-09-03 19:51:54,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (1/1) ... [2019-09-03 19:51:54,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (1/1) ... [2019-09-03 19:51:54,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (1/1) ... [2019-09-03 19:51:54,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:51:54,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:51:54,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:51:54,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:51:54,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (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 [2019-09-03 19:51:54,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:51:54,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:51:54,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:51:54,404 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:51:54,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:51:54,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 19:51:54,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:51:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 19:51:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:51:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:51:54,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:51:54,574 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:51:54,574 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:51:54,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:51:54 BoogieIcfgContainer [2019-09-03 19:51:54,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:51:54,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:51:54,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:51:54,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:51:54,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:51:53" (1/3) ... [2019-09-03 19:51:54,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e981012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:51:54, skipping insertion in model container [2019-09-03 19:51:54,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:51:54" (2/3) ... [2019-09-03 19:51:54,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e981012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:51:54, skipping insertion in model container [2019-09-03 19:51:54,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:51:54" (3/3) ... [2019-09-03 19:51:54,585 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2019-09-03 19:51:54,610 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:51:54,620 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:51:54,640 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:51:54,690 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:51:54,691 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:51:54,691 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:51:54,692 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:51:54,692 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:51:54,692 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:51:54,692 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:51:54,693 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:51:54,693 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:51:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-03 19:51:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 19:51:54,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:51:54,724 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:51:54,728 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:51:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:51:54,734 INFO L82 PathProgramCache]: Analyzing trace with hash -147882559, now seen corresponding path program 1 times [2019-09-03 19:51:54,736 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:51:54,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:51:54,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:54,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:51:54,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:51:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:51:54,861 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:51:54,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:51:54,865 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:51:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:51:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:51:54,879 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-03 19:51:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:51:54,898 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-03 19:51:54,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:51:54,900 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 19:51:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:51:54,907 INFO L225 Difference]: With dead ends: 32 [2019-09-03 19:51:54,907 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 19:51:54,910 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:51:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 19:51:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 19:51:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 19:51:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-03 19:51:54,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-03 19:51:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:51:54,962 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-03 19:51:54,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:51:54,963 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-03 19:51:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 19:51:54,963 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:51:54,964 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:51:54,964 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:51:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:51:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash 99303034, now seen corresponding path program 1 times [2019-09-03 19:51:54,965 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:51:54,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:51:54,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:54,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:51:54,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:51:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:51:55,062 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:51:55,062 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 19:51:55,063 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:51:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:51:55,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:51:55,064 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-03 19:51:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:51:55,129 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 19:51:55,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 19:51:55,130 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-03 19:51:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:51:55,131 INFO L225 Difference]: With dead ends: 21 [2019-09-03 19:51:55,131 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 19:51:55,132 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:51:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 19:51:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 19:51:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:51:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 19:51:55,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2019-09-03 19:51:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:51:55,138 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 19:51:55,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:51:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 19:51:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 19:51:55,139 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:51:55,139 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:51:55,140 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:51:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:51:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1368172775, now seen corresponding path program 1 times [2019-09-03 19:51:55,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:51:55,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:51:55,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:55,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:51:55,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:51:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:51:55,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:51:55,217 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:51:55,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:51:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:51:55,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 19:51:55,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:51:55,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:51:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:51:55,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:51:55,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-09-03 19:51:55,333 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 19:51:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 19:51:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:51:55,334 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-09-03 19:51:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:51:55,386 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-09-03 19:51:55,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:51:55,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-03 19:51:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:51:55,388 INFO L225 Difference]: With dead ends: 24 [2019-09-03 19:51:55,388 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 19:51:55,389 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:51:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 19:51:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-03 19:51:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-03 19:51:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-09-03 19:51:55,394 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 15 [2019-09-03 19:51:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:51:55,395 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-09-03 19:51:55,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 19:51:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-09-03 19:51:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 19:51:55,396 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:51:55,396 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:51:55,397 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:51:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:51:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -467892710, now seen corresponding path program 2 times [2019-09-03 19:51:55,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:51:55,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:51:55,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:55,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:51:55,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:51:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:51:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:51:55,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:51:55,480 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:51:55,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:51:55,510 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:51:55,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:51:55,512 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 19:51:55,513 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:51:55,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 19:51:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:51:55,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:51:55,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-09-03 19:51:55,580 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 19:51:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 19:51:55,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:51:55,581 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2019-09-03 19:51:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:51:55,642 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-09-03 19:51:55,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 19:51:55,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-09-03 19:51:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:51:55,643 INFO L225 Difference]: With dead ends: 19 [2019-09-03 19:51:55,643 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 19:51:55,644 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:51:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 19:51:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 19:51:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 19:51:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 19:51:55,646 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-09-03 19:51:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:51:55,646 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 19:51:55,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 19:51:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 19:51:55,647 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 19:51:55,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-03 19:51:55,719 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-03 19:51:55,719 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-03 19:51:55,719 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-03 19:51:55,719 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-03 19:51:55,719 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-03 19:51:55,720 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-03 19:51:55,720 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2019-09-03 19:51:55,720 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2019-09-03 19:51:55,721 INFO L443 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2019-09-03 19:51:55,721 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2019-09-03 19:51:55,722 INFO L443 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-09-03 19:51:55,722 INFO L443 ceAbstractionStarter]: For program point L13-3(lines 13 16) no Hoare annotation was computed. [2019-09-03 19:51:55,722 INFO L439 ceAbstractionStarter]: At program point L13-5(lines 13 16) the Hoare annotation is: (and (<= main_~y~0 main_~x~0) (<= 0 main_~y~0) (<= 1 main_~x~0)) [2019-09-03 19:51:55,722 INFO L439 ceAbstractionStarter]: At program point L13-6(lines 13 16) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2019-09-03 19:51:55,723 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-09-03 19:51:55,723 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-09-03 19:51:55,723 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-09-03 19:51:55,725 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-09-03 19:51:55,725 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-09-03 19:51:55,725 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-09-03 19:51:55,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 07:51:55 BoogieIcfgContainer [2019-09-03 19:51:55,747 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 19:51:55,751 INFO L168 Benchmark]: Toolchain (without parser) took 1886.02 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 87.7 MB in the beginning and 92.1 MB in the end (delta: -4.4 MB). Peak memory consumption was 56.9 MB. Max. memory is 7.1 GB. [2019-09-03 19:51:55,753 INFO L168 Benchmark]: CDTParser took 0.45 ms. Allocated memory is still 140.0 MB. Free memory was 106.1 MB in the beginning and 105.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 19:51:55,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.81 ms. Allocated memory is still 140.0 MB. Free memory was 87.5 MB in the beginning and 78.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-03 19:51:55,756 INFO L168 Benchmark]: Boogie Preprocessor took 147.46 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 78.3 MB in the beginning and 179.4 MB in the end (delta: -101.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-03 19:51:55,758 INFO L168 Benchmark]: RCFGBuilder took 233.08 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 168.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-03 19:51:55,760 INFO L168 Benchmark]: TraceAbstraction took 1170.72 ms. Allocated memory is still 201.3 MB. Free memory was 167.4 MB in the beginning and 92.1 MB in the end (delta: 75.3 MB). Peak memory consumption was 75.3 MB. Max. memory is 7.1 GB. [2019-09-03 19:51:55,769 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.45 ms. Allocated memory is still 140.0 MB. Free memory was 106.1 MB in the beginning and 105.9 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 328.81 ms. Allocated memory is still 140.0 MB. Free memory was 87.5 MB in the beginning and 78.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 147.46 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 78.3 MB in the beginning and 179.4 MB in the end (delta: -101.1 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 233.08 ms. Allocated memory is still 201.3 MB. Free memory was 179.4 MB in the beginning and 168.0 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1170.72 ms. Allocated memory is still 201.3 MB. Free memory was 167.4 MB in the beginning and 92.1 MB in the end (delta: 75.3 MB). Peak memory consumption was 75.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (y <= x && 0 <= y) && 1 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 1.0s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 16 SDslu, 121 SDs, 0 SdLazy, 47 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s 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 AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 18 HoareAnnotationTreeSize, 10 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 3102 SizeOfPredicates, 4 NumberOfNonLiveVariables, 88 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/24 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...