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-lit/gsv2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:53,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:53,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:53,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:25:53,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:25:53,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:25:53,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:25:53,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:25:53,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:25:53,389 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:25:53,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:25:53,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:25:53,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:53,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:53,398 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:53,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:53,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:53,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:53,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:53,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:53,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:53,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:53,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:53,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:53,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:25:53,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:25:53,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:25:53,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:25:53,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:25:53,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:25:53,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:53,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:53,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:53,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:53,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:53,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:53,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:53,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:53,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:53,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:53,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:53,437 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 [2019-09-20 13:25:53,472 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:53,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:53,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:53,476 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:53,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:53,477 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:53,479 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:53,479 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:53,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:53,480 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:53,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:53,481 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:53,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:53,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:53,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:53,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:53,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:53,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:53,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:53,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:53,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:53,485 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:53,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:53,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:53,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:53,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:53,486 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:53,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:53,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:53,487 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:53,538 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:53,557 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:53,561 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:53,563 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:53,564 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:53,565 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i [2019-09-20 13:25:53,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65de8cc3/d3d6f2c4f82e460d89d2016c0312213f/FLAG1297371f4 [2019-09-20 13:25:54,071 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:54,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i [2019-09-20 13:25:54,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65de8cc3/d3d6f2c4f82e460d89d2016c0312213f/FLAG1297371f4 [2019-09-20 13:25:54,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65de8cc3/d3d6f2c4f82e460d89d2016c0312213f [2019-09-20 13:25:54,522 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:54,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:54,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:54,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:54,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:54,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385d82a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54, skipping insertion in model container [2019-09-20 13:25:54,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,541 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:54,557 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:54,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:54,761 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:54,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:54,809 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:54,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54 WrapperNode [2019-09-20 13:25:54,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:54,810 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:54,810 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:54,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:54,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,921 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,933 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:54,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:54,935 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:54,935 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:54,936 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:55,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:55,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:55,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:55,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:55,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:55,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:55,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:55,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:55,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:55,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:55,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:55,175 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:55,175 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:25:55,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:55 BoogieIcfgContainer [2019-09-20 13:25:55,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:55,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:55,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:55,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:55,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:54" (1/3) ... [2019-09-20 13:25:55,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cb6155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:55, skipping insertion in model container [2019-09-20 13:25:55,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (2/3) ... [2019-09-20 13:25:55,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cb6155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:55, skipping insertion in model container [2019-09-20 13:25:55,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:55" (3/3) ... [2019-09-20 13:25:55,185 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.i [2019-09-20 13:25:55,195 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:55,203 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:55,223 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:55,299 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:55,302 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:55,302 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:55,302 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:55,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:55,303 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:55,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:55,305 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 13:25:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-20 13:25:55,330 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:55,331 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:55,334 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash 578729635, now seen corresponding path program 1 times [2019-09-20 13:25:55,344 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:55,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:55,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,417 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:55,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:55,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:25:55,491 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:55,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:55,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:55,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:55,508 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-20 13:25:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:55,522 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-09-20 13:25:55,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:55,523 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-20 13:25:55,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:55,531 INFO L225 Difference]: With dead ends: 19 [2019-09-20 13:25:55,531 INFO L226 Difference]: Without dead ends: 12 [2019-09-20 13:25:55,532 INFO L636 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 [2019-09-20 13:25:55,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-20 13:25:55,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-20 13:25:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-20 13:25:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-20 13:25:55,565 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2019-09-20 13:25:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:55,566 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-20 13:25:55,566 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-20 13:25:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-20 13:25:55,567 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:55,567 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:55,568 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:55,568 INFO L82 PathProgramCache]: Analyzing trace with hash 575035551, now seen corresponding path program 1 times [2019-09-20 13:25:55,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,570 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:55,613 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:55,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:25:55,613 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:55,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:25:55,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:25:55,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:55,616 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2019-09-20 13:25:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:55,628 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-20 13:25:55,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:25:55,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-20 13:25:55,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:55,629 INFO L225 Difference]: With dead ends: 13 [2019-09-20 13:25:55,629 INFO L226 Difference]: Without dead ends: 13 [2019-09-20 13:25:55,630 INFO L636 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 [2019-09-20 13:25:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-20 13:25:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-20 13:25:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-20 13:25:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-20 13:25:55,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-20 13:25:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:55,635 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-20 13:25:55,635 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:25:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-20 13:25:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-20 13:25:55,635 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:55,636 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:55,636 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash 681770644, now seen corresponding path program 1 times [2019-09-20 13:25:55,636 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:55,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:55,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,638 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:55,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:55,736 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:55,737 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2019-09-20 13:25:55,740 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [15], [17], [24], [27], [29], [35], [36], [37], [39] [2019-09-20 13:25:55,775 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:55,776 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:55,886 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:25:55,889 INFO L272 AbstractInterpreter]: Visited 12 different actions 44 times. Merged at 2 different actions 11 times. Widened at 1 different actions 3 times. Performed 86 root evaluator evaluations with a maximum evaluation depth of 5. Performed 86 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2019-09-20 13:25:55,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:55,894 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:25:55,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:55,894 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:55,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:55,917 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:25:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:55,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 13:25:55,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:56,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:56,044 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:56,106 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:25:56,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 13 [2019-09-20 13:25:56,106 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:56,107 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:25:56,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:25:56,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-20 13:25:56,108 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-20 13:25:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:56,188 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-09-20 13:25:56,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-20 13:25:56,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-20 13:25:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:56,189 INFO L225 Difference]: With dead ends: 11 [2019-09-20 13:25:56,189 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:56,190 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-09-20 13:25:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:56,191 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-09-20 13:25:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:56,192 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:56,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:25:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:56,192 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:56,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:56 BoogieIcfgContainer [2019-09-20 13:25:56,198 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:56,201 INFO L168 Benchmark]: Toolchain (without parser) took 1676.71 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 88.4 MB in the beginning and 102.2 MB in the end (delta: -13.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,202 INFO L168 Benchmark]: CDTParser took 1.11 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,203 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.26 ms. Allocated memory is still 132.1 MB. Free memory was 88.1 MB in the beginning and 78.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,204 INFO L168 Benchmark]: Boogie Preprocessor took 124.39 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.9 MB in the beginning and 175.6 MB in the end (delta: -96.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,205 INFO L168 Benchmark]: RCFGBuilder took 241.71 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 163.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,206 INFO L168 Benchmark]: TraceAbstraction took 1020.51 ms. Allocated memory is still 198.7 MB. Free memory was 163.1 MB in the beginning and 102.2 MB in the end (delta: 61.0 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,210 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.11 ms. Allocated memory is still 132.1 MB. Free memory was 106.4 MB in the beginning and 106.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 285.26 ms. Allocated memory is still 132.1 MB. Free memory was 88.1 MB in the beginning and 78.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.39 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 78.9 MB in the beginning and 175.6 MB in the end (delta: -96.7 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.71 ms. Allocated memory is still 198.7 MB. Free memory was 175.6 MB in the beginning and 163.8 MB in the end (delta: 11.9 MB). Peak memory consumption was 11.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1020.51 ms. Allocated memory is still 198.7 MB. Free memory was 163.1 MB in the beginning and 102.2 MB in the end (delta: 61.0 MB). Peak memory consumption was 61.0 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, 19 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 39 SDtfs, 2 SDslu, 33 SDs, 0 SdLazy, 18 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 1127 SizeOfPredicates, 5 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 2/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...