java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:46:20,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:46:20,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:46:20,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:46:20,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:46:20,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:46:20,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:46:20,359 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:46:20,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:46:20,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:46:20,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:46:20,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 12:46:20,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:46:20,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:46:20,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:46:20,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-05 12:46:20,396 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:46:20,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:46:20,397 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 12:46:20,397 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 12:46:20,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 12:46:20,398 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 12:46:20,398 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 12:46:20,399 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 12:46:20,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 12:46:20,399 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 12:46:20,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:46:20,401 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:46:20,401 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:46:20,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:46:20,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:46:20,402 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:46:20,402 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:46:20,402 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:46:20,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:46:20,403 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:46:20,403 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:46:20,403 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 12:46:20,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:46:20,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:46:20,404 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:46:20,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:46:20,404 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 12:46:20,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:46:20,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:46:20,405 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 12:46:20,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:46:20,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:46:20,454 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:46:20,455 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:46:20,456 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:46:20,456 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-09-05 12:46:20,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601327800/a6560b71a44844b0b55d75b09b5e89ef/FLAG9a975d4d0 [2019-09-05 12:46:20,938 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:46:20,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2019-09-05 12:46:20,945 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601327800/a6560b71a44844b0b55d75b09b5e89ef/FLAG9a975d4d0 [2019-09-05 12:46:21,337 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/601327800/a6560b71a44844b0b55d75b09b5e89ef [2019-09-05 12:46:21,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:46:21,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:46:21,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:21,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:46:21,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:46:21,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6b4f60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21, skipping insertion in model container [2019-09-05 12:46:21,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,370 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:46:21,386 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:46:21,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:21,599 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:46:21,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:21,650 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:46:21,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21 WrapperNode [2019-09-05 12:46:21,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:21,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:46:21,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:46:21,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:46:21,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (1/1) ... [2019-09-05 12:46:21,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:46:21,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:46:21,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:46:21,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:46:21,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (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 [2019-09-05 12:46:21,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:46:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:46:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:46:21,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:46:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:46:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:46:21,836 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:46:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-05 12:46:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-05 12:46:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-05 12:46:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-05 12:46:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:46:21,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:46:22,050 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:46:22,050 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:46:22,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:22 BoogieIcfgContainer [2019-09-05 12:46:22,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:46:22,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:46:22,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:46:22,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:46:22,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:46:21" (1/3) ... [2019-09-05 12:46:22,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a58e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:22, skipping insertion in model container [2019-09-05 12:46:22,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:21" (2/3) ... [2019-09-05 12:46:22,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a58e1fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:22, skipping insertion in model container [2019-09-05 12:46:22,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:22" (3/3) ... [2019-09-05 12:46:22,076 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2019-09-05 12:46:22,091 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:46:22,098 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:46:22,116 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:46:22,161 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:46:22,161 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 12:46:22,161 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:46:22,162 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:46:22,162 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:46:22,163 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:46:22,163 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:46:22,164 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:46:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-05 12:46:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 12:46:22,191 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:22,192 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:22,194 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2019-09-05 12:46:22,200 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:22,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:22,240 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:22,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:22,241 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:22,324 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:22,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:46:22,325 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:22,328 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:22,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:22,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:22,343 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-05 12:46:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:22,357 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-05 12:46:22,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:22,358 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-05 12:46:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:22,367 INFO L225 Difference]: With dead ends: 21 [2019-09-05 12:46:22,367 INFO L226 Difference]: Without dead ends: 14 [2019-09-05 12:46:22,369 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-05 12:46:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-05 12:46:22,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 12:46:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 12:46:22,403 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-05 12:46:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:22,403 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 12:46:22,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 12:46:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 12:46:22,404 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:22,404 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:22,405 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2019-09-05 12:46:22,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:22,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:22,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:22,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:22,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:22,471 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:22,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 12:46:22,471 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:22,473 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 12:46:22,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 12:46:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:46:22,474 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2019-09-05 12:46:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:22,488 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-09-05 12:46:22,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 12:46:22,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-09-05 12:46:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:22,490 INFO L225 Difference]: With dead ends: 16 [2019-09-05 12:46:22,490 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 12:46:22,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:46:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 12:46:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-05 12:46:22,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 12:46:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-05 12:46:22,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-09-05 12:46:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:22,496 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-05 12:46:22,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 12:46:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-05 12:46:22,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 12:46:22,497 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:22,497 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:22,497 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:22,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2019-09-05 12:46:22,498 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:22,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:22,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:22,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:22,500 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:22,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:22,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:22,545 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:22,546 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2019-09-05 12:46:22,548 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [23], [26], [28], [34], [35], [36], [38] [2019-09-05 12:46:22,581 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 12:46:22,581 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 12:46:22,639 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-05 12:46:22,640 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 17 variables. [2019-09-05 12:46:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:22,643 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-05 12:46:22,672 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-05 12:46:22,673 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-05 12:46:22,675 INFO L420 sIntCurrentIteration]: We unified 13 AI predicates to 13 [2019-09-05 12:46:22,675 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-05 12:46:22,677 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:46:22,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-05 12:46:22,678 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:22,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:22,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:22,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:22,679 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 2 states. [2019-09-05 12:46:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:22,680 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-05 12:46:22,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:22,681 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-05 12:46:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:22,682 INFO L225 Difference]: With dead ends: 6 [2019-09-05 12:46:22,682 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 12:46:22,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:22,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 12:46:22,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 12:46:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 12:46:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 12:46:22,684 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-09-05 12:46:22,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:22,685 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 12:46:22,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 12:46:22,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 12:46:22,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:46:22 BoogieIcfgContainer [2019-09-05 12:46:22,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:46:22,693 INFO L168 Benchmark]: Toolchain (without parser) took 1340.39 ms. Allocated memory was 136.8 MB in the beginning and 196.6 MB in the end (delta: 59.8 MB). Free memory was 84.0 MB in the beginning and 124.5 MB in the end (delta: -40.6 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:22,695 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 102.8 MB in the beginning and 102.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:46:22,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.58 ms. Allocated memory is still 136.8 MB. Free memory was 83.8 MB in the beginning and 74.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:22,697 INFO L168 Benchmark]: Boogie Preprocessor took 124.76 ms. Allocated memory was 136.8 MB in the beginning and 196.6 MB in the end (delta: 59.8 MB). Free memory was 74.2 MB in the beginning and 173.8 MB in the end (delta: -99.6 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:22,698 INFO L168 Benchmark]: RCFGBuilder took 275.31 ms. Allocated memory is still 196.6 MB. Free memory was 173.2 MB in the beginning and 160.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:22,699 INFO L168 Benchmark]: TraceAbstraction took 637.21 ms. Allocated memory is still 196.6 MB. Free memory was 160.8 MB in the beginning and 124.5 MB in the end (delta: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:22,703 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 102.8 MB in the beginning and 102.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.58 ms. Allocated memory is still 136.8 MB. Free memory was 83.8 MB in the beginning and 74.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.76 ms. Allocated memory was 136.8 MB in the beginning and 196.6 MB in the end (delta: 59.8 MB). Free memory was 74.2 MB in the beginning and 173.8 MB in the end (delta: -99.6 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 275.31 ms. Allocated memory is still 196.6 MB. Free memory was 173.2 MB in the beginning and 160.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 637.21 ms. Allocated memory is still 196.6 MB. Free memory was 160.8 MB in the beginning and 124.5 MB in the end (delta: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 0.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 38 SDtfs, 1 SDslu, 10 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9423076923076923 AbsIntWeakeningRatio, 0.6923076923076923 AbsIntAvgWeakeningVarsNumRemoved, 0.46153846153846156 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 38 NumberOfCodeBlocks, 38 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 511 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...