/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:04,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:04,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:04,789 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:16:04,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:04,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:04,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:04,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:16:04,855 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:04,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:04,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:04,857 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:04,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:04,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:04,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:04,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:04,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:04,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:04,858 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:04,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:04,859 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:04,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:04,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:04,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:04,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:04,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:04,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:04,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:04,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:04,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:04,860 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:04,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:05,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:05,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:05,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:05,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:05,294 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:05,296 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/while_infinite_loop_3.c [2021-05-02 23:16:05,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b60f874b/17db761846674a65b876677a44112c0e/FLAG7987261a2 [2021-05-02 23:16:05,924 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:05,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_3.c [2021-05-02 23:16:05,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b60f874b/17db761846674a65b876677a44112c0e/FLAG7987261a2 [2021-05-02 23:16:06,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b60f874b/17db761846674a65b876677a44112c0e [2021-05-02 23:16:06,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:06,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:06,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:06,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:06,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:06,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd05647 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06, skipping insertion in model container [2021-05-02 23:16:06,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,339 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:06,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:06,512 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_3.c[333,346] [2021-05-02 23:16:06,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:06,533 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:06,545 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/while_infinite_loop_3.c[333,346] [2021-05-02 23:16:06,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:06,565 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:06,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06 WrapperNode [2021-05-02 23:16:06,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:06,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:06,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:06,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:06,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (1/1) ... [2021-05-02 23:16:06,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:06,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:06,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:06,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:06,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (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 [2021-05-02 23:16:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2021-05-02 23:16:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2021-05-02 23:16:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:07,057 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:07,058 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 23:16:07,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:07 BoogieIcfgContainer [2021-05-02 23:16:07,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:07,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:07,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:07,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:07,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:06" (1/3) ... [2021-05-02 23:16:07,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481086ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:07, skipping insertion in model container [2021-05-02 23:16:07,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:06" (2/3) ... [2021-05-02 23:16:07,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481086ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:07, skipping insertion in model container [2021-05-02 23:16:07,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:07" (3/3) ... [2021-05-02 23:16:07,085 INFO L111 eAbstractionObserver]: Analyzing ICFG while_infinite_loop_3.c [2021-05-02 23:16:07,091 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:07,096 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:07,149 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:07,183 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:07,183 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:07,184 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:07,184 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:07,184 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:07,184 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:07,184 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:07,184 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:07,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 23:16:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-02 23:16:07,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:07,219 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:07,221 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:07,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1499484955, now seen corresponding path program 1 times [2021-05-02 23:16:07,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:07,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625027723] [2021-05-02 23:16:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:07,308 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:07,614 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:07,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625027723] [2021-05-02 23:16:07,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [625027723] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:07,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:07,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:07,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218977874] [2021-05-02 23:16:07,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:07,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:07,637 INFO L87 Difference]: Start difference. First operand has 23 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:07,761 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-05-02 23:16:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:07,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-05-02 23:16:07,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:07,778 INFO L225 Difference]: With dead ends: 37 [2021-05-02 23:16:07,778 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 23:16:07,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 23:16:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2021-05-02 23:16:07,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:16:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:16:07,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2021-05-02 23:16:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:07,844 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:16:07,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:07,845 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:16:07,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:16:07,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:07,847 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:07,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:07,847 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1713498874, now seen corresponding path program 1 times [2021-05-02 23:16:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897918051] [2021-05-02 23:16:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:07,864 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 23:16:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:08,083 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:08,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897918051] [2021-05-02 23:16:08,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1897918051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:08,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:08,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:08,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982291619] [2021-05-02 23:16:08,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:08,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:08,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:08,087 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 23:16:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:08,330 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 23:16:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-05-02 23:16:08,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:08,333 INFO L225 Difference]: With dead ends: 17 [2021-05-02 23:16:08,333 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 23:16:08,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 23:16:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 23:16:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 23:16:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 23:16:08,337 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-02 23:16:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:08,338 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 23:16:08,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 23:16:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 23:16:08,338 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 23:16:08,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:08,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 23:16:08,862 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 23:16:08,862 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 23:16:08,863 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 23:16:08,863 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (= ~x~0 0) [2021-05-02 23:16:08,863 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= ~x~0 |old(~x~0)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 23:16:08,863 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (= ~x~0 0) [2021-05-02 23:16:08,863 INFO L194 CegarLoopUtils]: At program point evalENTRY(lines 14 21) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2021-05-02 23:16:08,864 INFO L194 CegarLoopUtils]: At program point L16-1(lines 14 21) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2021-05-02 23:16:08,864 INFO L194 CegarLoopUtils]: At program point evalEXIT(lines 14 21) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2021-05-02 23:16:08,864 INFO L194 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: false [2021-05-02 23:16:08,864 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~x~0 0) [2021-05-02 23:16:08,864 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 23:16:08,864 INFO L194 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: false [2021-05-02 23:16:08,864 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2021-05-02 23:16:08,864 INFO L194 CegarLoopUtils]: At program point L29(lines 24 35) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2021-05-02 23:16:08,865 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2021-05-02 23:16:08,865 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (= ~x~0 |old(~x~0)|) (not (= |old(~x~0)| 0))) [2021-05-02 23:16:08,865 INFO L194 CegarLoopUtils]: At program point L26-1(lines 26 30) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2021-05-02 23:16:08,865 INFO L194 CegarLoopUtils]: At program point mainEXIT(lines 24 35) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2021-05-02 23:16:08,865 INFO L194 CegarLoopUtils]: At program point mainFINAL(lines 24 35) the Hoare annotation is: (not (= |old(~x~0)| 0)) [2021-05-02 23:16:08,865 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-02 23:16:08,865 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:16:08,866 INFO L194 CegarLoopUtils]: At program point L7(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= ~x~0 0))) [2021-05-02 23:16:08,866 INFO L194 CegarLoopUtils]: At program point L6(lines 6 8) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:16:08,866 INFO L194 CegarLoopUtils]: At program point L6-2(lines 5 10) the Hoare annotation is: (or (not (= ~x~0 0)) (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-02 23:16:08,866 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= ~x~0 0))) [2021-05-02 23:16:08,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:16:08 BoogieIcfgContainer [2021-05-02 23:16:08,882 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:16:08,883 INFO L168 Benchmark]: Toolchain (without parser) took 2564.41 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 151.2 MB in the beginning and 193.9 MB in the end (delta: -42.7 MB). Peak memory consumption was 61.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:08,884 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 185.6 MB. Free memory is still 167.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:16:08,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.01 ms. Allocated memory is still 185.6 MB. Free memory was 151.0 MB in the beginning and 141.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:08,885 INFO L168 Benchmark]: Boogie Preprocessor took 91.84 ms. Allocated memory is still 185.6 MB. Free memory was 141.8 MB in the beginning and 168.9 MB in the end (delta: -27.1 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:08,885 INFO L168 Benchmark]: RCFGBuilder took 398.61 ms. Allocated memory is still 185.6 MB. Free memory was 168.9 MB in the beginning and 156.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:08,886 INFO L168 Benchmark]: TraceAbstraction took 1820.60 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 155.7 MB in the beginning and 193.9 MB in the end (delta: -38.3 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:16:08,888 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 185.6 MB. Free memory is still 167.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.01 ms. Allocated memory is still 185.6 MB. Free memory was 151.0 MB in the beginning and 141.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 91.84 ms. Allocated memory is still 185.6 MB. Free memory was 141.8 MB in the beginning and 168.9 MB in the end (delta: -27.1 MB). Peak memory consumption was 4.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 398.61 ms. Allocated memory is still 185.6 MB. Free memory was 168.9 MB in the beginning and 156.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1820.60 ms. Allocated memory was 185.6 MB in the beginning and 223.3 MB in the end (delta: 37.7 MB). Free memory was 155.7 MB in the beginning and 193.9 MB in the end (delta: -38.3 MB). Peak memory consumption was 65.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1159.2ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 20.2ms, AutomataDifference: 408.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 522.1ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27 SDtfs, 23 SDslu, 17 SDs, 0 SdLazy, 28 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 113.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 329.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.5ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 23 LocationsWithAnnotation, 38 PreInvPairs, 45 NumberOfFragments, 163 HoareAnnotationTreeSize, 38 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 108.9ms HoareSimplificationTime, 23 FomulaSimplificationsInter, 375 FormulaSimplificationTreeSizeReductionInter, 385.6ms HoareSimplificationTimeInter, 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 14]: Procedure Contract for eval Derived contract for procedure eval: x == \old(x) || !(\old(x) == 0) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: !(\old(x) == 0) - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (!(x == 0) || \old(cond) == 0) || !(cond == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...