/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:01:20,274 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:01:20,277 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:01:20,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:01:20,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:01:20,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:01:20,333 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:01:20,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:01:20,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:01:20,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:01:20,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:01:20,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:01:20,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:01:20,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:01:20,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:01:20,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:01:20,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:01:20,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:01:20,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:01:20,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:01:20,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:01:20,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:01:20,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:01:20,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:01:20,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:01:20,386 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:01:20,387 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:01:20,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:01:20,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:01:20,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:01:20,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:01:20,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:01:20,409 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:01:20,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:01:20,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:01:20,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:01:20,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:01:20,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:01:20,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:01:20,411 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:01:20,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:01:20,412 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:01:20,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:01:20,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:01:20,413 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:01:20,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:01:20,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:01:20,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:20,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:01:20,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:01:20,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:01:20,414 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:01:20,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:01:20,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:01:20,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:01:20,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:01:20,699 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:01:20,700 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-08-22 23:01:20,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5094ef4ae/1ce98b533db047c6b9285e2eb6f5178e/FLAGf93f8378e [2020-08-22 23:01:21,228 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:01:21,229 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2020-08-22 23:01:21,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5094ef4ae/1ce98b533db047c6b9285e2eb6f5178e/FLAGf93f8378e [2020-08-22 23:01:21,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5094ef4ae/1ce98b533db047c6b9285e2eb6f5178e [2020-08-22 23:01:21,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:01:21,639 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:01:21,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:21,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:01:21,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:01:21,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:21,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cab3797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21, skipping insertion in model container [2020-08-22 23:01:21,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:21,657 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:01:21,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:01:21,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:21,873 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:01:21,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:21,915 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:01:21,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21 WrapperNode [2020-08-22 23:01:21,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:21,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:01:21,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:01:21,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:01:21,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:21,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:22,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:22,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:22,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:22,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:22,070 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... [2020-08-22 23:01:22,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:01:22,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:01:22,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:01:22,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:01:22,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:22,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:01:22,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:01:22,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:01:22,164 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:01:22,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:01:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 23:01:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:01:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-08-22 23:01:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:01:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:01:22,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:01:22,421 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:01:22,421 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:01:22,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:22 BoogieIcfgContainer [2020-08-22 23:01:22,426 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:01:22,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:01:22,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:01:22,435 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:01:22,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:01:21" (1/3) ... [2020-08-22 23:01:22,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281d56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:22, skipping insertion in model container [2020-08-22 23:01:22,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:21" (2/3) ... [2020-08-22 23:01:22,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281d56a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:22, skipping insertion in model container [2020-08-22 23:01:22,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:22" (3/3) ... [2020-08-22 23:01:22,446 INFO L109 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-08-22 23:01:22,472 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:01:22,492 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:01:22,507 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:01:22,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:01:22,531 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:01:22,531 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:01:22,531 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:01:22,532 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:01:22,532 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:01:22,532 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:01:22,532 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:01:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-08-22 23:01:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 23:01:22,573 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:22,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:22,575 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1806400052, now seen corresponding path program 1 times [2020-08-22 23:01:22,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:22,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440834764] [2020-08-22 23:01:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:22,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:22,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440834764] [2020-08-22 23:01:22,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:22,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:01:22,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122327080] [2020-08-22 23:01:22,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:01:22,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:01:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:22,974 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-08-22 23:01:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:23,341 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-08-22 23:01:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:01:23,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-22 23:01:23,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:23,354 INFO L225 Difference]: With dead ends: 85 [2020-08-22 23:01:23,355 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 23:01:23,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:01:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 23:01:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-08-22 23:01:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 23:01:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-08-22 23:01:23,413 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 23 [2020-08-22 23:01:23,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:23,414 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-08-22 23:01:23,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:01:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-08-22 23:01:23,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 23:01:23,416 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:23,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:23,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:01:23,417 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1097761428, now seen corresponding path program 1 times [2020-08-22 23:01:23,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:23,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892606581] [2020-08-22 23:01:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:23,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:23,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892606581] [2020-08-22 23:01:23,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:23,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:01:23,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294918014] [2020-08-22 23:01:23,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:01:23,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:01:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:23,558 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 5 states. [2020-08-22 23:01:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:23,877 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-08-22 23:01:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 23:01:23,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-08-22 23:01:23,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:23,879 INFO L225 Difference]: With dead ends: 50 [2020-08-22 23:01:23,879 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 23:01:23,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:01:23,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 23:01:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-08-22 23:01:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 23:01:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 23:01:23,906 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 23 [2020-08-22 23:01:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:23,908 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 23:01:23,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:01:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 23:01:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 23:01:23,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:23,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:23,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:01:23,911 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:23,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1269377587, now seen corresponding path program 1 times [2020-08-22 23:01:23,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:23,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671322486] [2020-08-22 23:01:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:24,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:24,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671322486] [2020-08-22 23:01:24,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:24,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:01:24,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108396030] [2020-08-22 23:01:24,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:01:24,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:01:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:01:24,198 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 8 states. [2020-08-22 23:01:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:24,584 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-08-22 23:01:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:01:24,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-08-22 23:01:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:24,586 INFO L225 Difference]: With dead ends: 55 [2020-08-22 23:01:24,587 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 23:01:24,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:01:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 23:01:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 39. [2020-08-22 23:01:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 23:01:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 23:01:24,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 28 [2020-08-22 23:01:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:24,603 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 23:01:24,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:01:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 23:01:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 23:01:24,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:24,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:24,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:01:24,605 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1258948973, now seen corresponding path program 1 times [2020-08-22 23:01:24,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:24,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478567248] [2020-08-22 23:01:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:24,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:24,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:24,709 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:01:24,710 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:01:24,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:01:24,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:01:24 BoogieIcfgContainer [2020-08-22 23:01:24,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:01:24,760 INFO L168 Benchmark]: Toolchain (without parser) took 3119.27 ms. Allocated memory was 139.5 MB in the beginning and 237.0 MB in the end (delta: 97.5 MB). Free memory was 103.1 MB in the beginning and 135.1 MB in the end (delta: -31.9 MB). Peak memory consumption was 65.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:24,763 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 23:01:24,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:24,766 INFO L168 Benchmark]: Boogie Preprocessor took 168.94 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 93.1 MB in the beginning and 182.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:24,767 INFO L168 Benchmark]: RCFGBuilder took 337.50 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 168.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:24,774 INFO L168 Benchmark]: TraceAbstraction took 2328.19 ms. Allocated memory was 204.5 MB in the beginning and 237.0 MB in the end (delta: 32.5 MB). Free memory was 167.4 MB in the beginning and 135.1 MB in the end (delta: 32.3 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:24,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.69 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 168.94 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 93.1 MB in the beginning and 182.4 MB in the end (delta: -89.3 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 337.50 ms. Allocated memory is still 204.5 MB. Free memory was 182.4 MB in the beginning and 168.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2328.19 ms. Allocated memory was 204.5 MB in the beginning and 237.0 MB in the end (delta: 32.5 MB). Free memory was 167.4 MB in the beginning and 135.1 MB in the end (delta: 32.3 MB). Peak memory consumption was 64.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int b; VAL [\old(b)=1026, b=0] [L13] _Bool k=__VERIFIER_nondet_bool(); VAL [__VERIFIER_nondet_bool()=257, b=0, k=1] [L14] unsigned int i,n,j; VAL [b=0, k=1] [L15] int a[1025]; VAL [b=0, k=1] [L17] COND TRUE \read(k) VAL [b=0, k=1] [L18] n=0 VAL [b=0, k=1, n=0] [L23] i=0 VAL [b=0, i=0, k=1, n=0] [L24] j=__VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=1023, b=0, i=0, j=1023, k=1, n=0] [L25] COND FALSE !(j > 10000) VAL [b=0, i=0, j=1023, k=1, n=0] [L28] COND TRUE i <= n VAL [b=0, i=0, j=1023, k=1, n=0] [L29] i++ VAL [b=0, i=1, j=1023, k=1, n=0] [L30] j= j +2 VAL [b=0, i=1, j=1025, k=1, n=0] [L28] COND FALSE !(i <= n) VAL [b=0, i=1, j=1025, k=1, n=0] [L33] a[i]=0 VAL [b=0, i=1, j=1025, k=1, n=0] [L34] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L5] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L6] __VERIFIER_error() VAL [\old(cond)=0, b=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 109 SDtfs, 177 SDslu, 74 SDs, 0 SdLazy, 304 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 33 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 12063 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...