/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/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:01:36,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:01:36,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:01:36,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 23:01:36,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:01:36,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:01:36,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:01:36,177 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 23:01:36,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:01:36,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:01:36,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:01:36,192 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:01:36,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:01:36,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:01:36,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:01:36,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:01:36,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:01:36,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:01:36,193 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:01:36,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:01:36,193 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:01:36,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:01:36,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:01:36,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:01:36,194 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:01:36,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:01:36,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:01:36,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:01:36,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:01:36,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:01:36,194 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:01:36,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:01:36,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:01:36,487 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:01:36,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:01:36,489 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:01:36,489 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:01:36,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2021-05-02 23:01:36,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbeb3c8c8/42a9e2c17964440c80233a309c1aea2d/FLAG4a07a3757 [2021-05-02 23:01:36,947 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:01:36,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-2.c [2021-05-02 23:01:36,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbeb3c8c8/42a9e2c17964440c80233a309c1aea2d/FLAG4a07a3757 [2021-05-02 23:01:36,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbeb3c8c8/42a9e2c17964440c80233a309c1aea2d [2021-05-02 23:01:36,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:01:36,979 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:01:36,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:36,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:01:36,986 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:01:36,987 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:36" (1/1) ... [2021-05-02 23:01:36,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56f44515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:36, skipping insertion in model container [2021-05-02 23:01:36,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:01:36" (1/1) ... [2021-05-02 23:01:36,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:01:37,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:01:37,112 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/array-2.c[319,332] [2021-05-02 23:01:37,125 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:37,130 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:01:37,173 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/array-2.c[319,332] [2021-05-02 23:01:37,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:01:37,196 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:01:37,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37 WrapperNode [2021-05-02 23:01:37,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:01:37,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:01:37,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:01:37,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:01:37,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (1/1) ... [2021-05-02 23:01:37,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:01:37,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:01:37,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:01:37,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:01:37,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (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 23:01:37,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:01:37,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:01:37,287 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:01:37,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:01:37,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:01:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:01:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:01:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:01:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:01:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:01:37,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 23:01:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:01:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:01:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:01:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:01:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:01:37,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:01:37,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:01:37,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:01:37,461 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:01:37,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:37 BoogieIcfgContainer [2021-05-02 23:01:37,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:01:37,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:01:37,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:01:37,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:01:37,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:01:36" (1/3) ... [2021-05-02 23:01:37,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ffdd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:37, skipping insertion in model container [2021-05-02 23:01:37,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:01:37" (2/3) ... [2021-05-02 23:01:37,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ffdd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:01:37, skipping insertion in model container [2021-05-02 23:01:37,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:01:37" (3/3) ... [2021-05-02 23:01:37,467 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2021-05-02 23:01:37,470 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:01:37,472 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:01:37,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:01:37,510 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:01:37,510 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:01:37,510 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:01:37,510 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:01:37,511 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:01:37,511 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:01:37,511 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:01:37,511 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:01:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:01:37,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:01:37,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:37,527 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:37,527 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:37,530 INFO L82 PathProgramCache]: Analyzing trace with hash -588233041, now seen corresponding path program 1 times [2021-05-02 23:01:37,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:37,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474263829] [2021-05-02 23:01:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:37,612 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:37,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:37,800 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 23:01:37,802 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474263829] [2021-05-02 23:01:37,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [474263829] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:37,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:37,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:01:37,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501844847] [2021-05-02 23:01:37,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:01:37,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:37,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:01:37,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:37,818 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 23:01:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:37,888 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 23:01:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:01:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 23:01:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:37,893 INFO L225 Difference]: With dead ends: 35 [2021-05-02 23:01:37,893 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 23:01:37,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:01:37,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 23:01:37,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 23:01:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 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 23:01:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 23:01:37,927 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2021-05-02 23:01:37,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:37,928 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 23:01:37,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 23:01:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 23:01:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:01:37,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:37,929 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:37,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:01:37,929 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:37,930 INFO L82 PathProgramCache]: Analyzing trace with hash -903153702, now seen corresponding path program 1 times [2021-05-02 23:01:37,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:37,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410071882] [2021-05-02 23:01:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:37,937 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:37,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:01:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:01:38,101 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 23:01:38,101 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:01:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410071882] [2021-05-02 23:01:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410071882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:01:38,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:01:38,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:01:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011882531] [2021-05-02 23:01:38,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:01:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:01:38,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:01:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:01:38,106 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:01:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:01:38,164 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-02 23:01:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:01:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12 [2021-05-02 23:01:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:01:38,165 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:01:38,165 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:01:38,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:01:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:01:38,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-05-02 23:01:38,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 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 23:01:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 23:01:38,170 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-05-02 23:01:38,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:01:38,170 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 23:01:38,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 23:01:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 23:01:38,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 23:01:38,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:01:38,171 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:01:38,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:01:38,171 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:01:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:01:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1274683932, now seen corresponding path program 1 times [2021-05-02 23:01:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:01:38,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772423136] [2021-05-02 23:01:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:01:38,194 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:01:38,195 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:01:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:01:38,222 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:01:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 23:01:38,256 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 23:01:38,272 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-02 23:01:38,272 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 23:01:38,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:01:38,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:01:38 BoogieIcfgContainer [2021-05-02 23:01:38,281 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 23:01:38,282 INFO L168 Benchmark]: Toolchain (without parser) took 1313.40 ms. Allocated memory is still 196.1 MB. Free memory was 160.4 MB in the beginning and 157.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.3 MB. Max. memory is 8.0 GB. [2021-05-02 23:01:38,282 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 196.1 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 23:01:38,283 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.59 ms. Allocated memory is still 196.1 MB. Free memory was 160.1 MB in the beginning and 178.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 23:01:38,283 INFO L168 Benchmark]: Boogie Preprocessor took 33.70 ms. Allocated memory is still 196.1 MB. Free memory was 178.4 MB in the beginning and 176.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 23:01:38,283 INFO L168 Benchmark]: RCFGBuilder took 230.43 ms. Allocated memory is still 196.1 MB. Free memory was 176.8 MB in the beginning and 162.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 23:01:38,284 INFO L168 Benchmark]: TraceAbstraction took 817.93 ms. Allocated memory is still 196.1 MB. Free memory was 162.1 MB in the beginning and 157.8 MB in the end (delta: 4.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-05-02 23:01:38,285 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 196.1 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 213.59 ms. Allocated memory is still 196.1 MB. Free memory was 160.1 MB in the beginning and 178.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.70 ms. Allocated memory is still 196.1 MB. Free memory was 178.4 MB in the beginning and 176.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 230.43 ms. Allocated memory is still 196.1 MB. Free memory was 176.8 MB in the beginning and 162.8 MB in the end (delta: 14.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 817.93 ms. Allocated memory is still 196.1 MB. Free memory was 162.1 MB in the beginning and 157.8 MB in the end (delta: 4.3 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] unsigned int SIZE=1; [L16] unsigned int j,k; [L17] int array[SIZE], menor; [L19] menor = __VERIFIER_nondet_int() [L21] j=0 [L21] COND TRUE jmenor) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 764.0ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 10.1ms, AutomataDifference: 150.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 11 SDslu, 13 SDs, 0 SdLazy, 34 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 74.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 91.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 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...