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-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:01:36,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:01:36,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:01:36,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 13:01:36,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 13:01:36,387 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 13:01:36,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 13:01:36,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 13:01:36,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 13:01:36,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 13:01:36,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 13:01:36,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-05 13:01:36,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 13:01:36,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 13:01:36,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 13:01:36,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 13:01:36,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 13:01:36,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 13:01:36,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 13:01:36,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 13:01:36,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 13:01:36,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 13:01:36,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 13:01:36,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 13:01:36,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-05 13:01:36,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-05 13:01:36,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-05 13:01:36,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-05 13:01:36,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-05 13:01:36,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-05 13:01:36,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 13:01:36,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 13:01:36,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 13:01:36,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 13:01:36,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 13:01:36,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 13:01:36,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 13:01:36,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 13:01:36,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 13:01:36,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 13:01:36,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 13:01:36,422 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 13:01:36,437 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:01:36,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:01:36,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:01:36,438 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:01:36,438 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:01:36,439 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:01:36,439 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:01:36,439 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:01:36,439 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:01:36,439 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:01:36,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:01:36,441 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:01:36,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:01:36,442 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:01:36,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:01:36,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:01:36,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:01:36,442 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:01:36,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:01:36,443 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:01:36,443 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:01:36,444 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:01:36,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:01:36,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:01:36,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:01:36,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:01:36,445 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:01:36,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:01:36,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:01:36,446 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:01:36,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:01:36,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:01:36,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:01:36,515 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:01:36,515 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:01:36,516 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2019-09-05 13:01:36,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4121e0106/752d4c4d5c3146d399a875fc897b52e6/FLAGf200fbbe3 [2019-09-05 13:01:36,997 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:01:36,997 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2019-09-05 13:01:37,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4121e0106/752d4c4d5c3146d399a875fc897b52e6/FLAGf200fbbe3 [2019-09-05 13:01:37,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4121e0106/752d4c4d5c3146d399a875fc897b52e6 [2019-09-05 13:01:37,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:01:37,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:01:37,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:01:37,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:01:37,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:01:37,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eabac37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37, skipping insertion in model container [2019-09-05 13:01:37,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,440 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:01:37,462 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:01:37,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:01:37,650 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:01:37,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:01:37,682 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:01:37,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37 WrapperNode [2019-09-05 13:01:37,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:01:37,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:01:37,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:01:37,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:01:37,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,799 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... [2019-09-05 13:01:37,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:01:37,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:01:37,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:01:37,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:01:37,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:01:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:01:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:01:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 13:01:37,856 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:01:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:01:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:01:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:01:37,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 13:01:37,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:01:37,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:01:37,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:01:38,174 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:01:38,174 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-05 13:01:38,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:01:38 BoogieIcfgContainer [2019-09-05 13:01:38,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:01:38,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:01:38,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:01:38,179 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:01:38,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:01:37" (1/3) ... [2019-09-05 13:01:38,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1561adc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:01:38, skipping insertion in model container [2019-09-05 13:01:38,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:01:37" (2/3) ... [2019-09-05 13:01:38,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1561adc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:01:38, skipping insertion in model container [2019-09-05 13:01:38,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:01:38" (3/3) ... [2019-09-05 13:01:38,182 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2019-09-05 13:01:38,192 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:01:38,200 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:01:38,216 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:01:38,241 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:01:38,241 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:01:38,241 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:01:38,241 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:01:38,242 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:01:38,242 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:01:38,242 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:01:38,242 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:01:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-05 13:01:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-05 13:01:38,267 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:38,268 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:38,270 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash -810471198, now seen corresponding path program 1 times [2019-09-05 13:01:38,276 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:38,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:38,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:38,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:38,314 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:38,491 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 13:01:38,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:01:38,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-05 13:01:38,493 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:01:38,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 13:01:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 13:01:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 13:01:38,517 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2019-09-05 13:01:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:38,770 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2019-09-05 13:01:38,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 13:01:38,772 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-09-05 13:01:38,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:38,784 INFO L225 Difference]: With dead ends: 50 [2019-09-05 13:01:38,785 INFO L226 Difference]: Without dead ends: 36 [2019-09-05 13:01:38,789 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:01:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-05 13:01:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-09-05 13:01:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 13:01:38,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-09-05 13:01:38,839 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2019-09-05 13:01:38,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:38,839 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-09-05 13:01:38,840 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 13:01:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-09-05 13:01:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-05 13:01:38,842 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:38,842 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:38,843 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:38,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:38,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1204298207, now seen corresponding path program 1 times [2019-09-05 13:01:38,845 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:38,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:38,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:38,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:38,847 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-05 13:01:38,954 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:01:38,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-05 13:01:38,955 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:01:38,957 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-05 13:01:38,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-05 13:01:38,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-05 13:01:38,960 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2019-09-05 13:01:39,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:39,011 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-05 13:01:39,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:01:39,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-09-05 13:01:39,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:39,014 INFO L225 Difference]: With dead ends: 33 [2019-09-05 13:01:39,014 INFO L226 Difference]: Without dead ends: 33 [2019-09-05 13:01:39,019 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-05 13:01:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-05 13:01:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-05 13:01:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 13:01:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-09-05 13:01:39,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2019-09-05 13:01:39,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:39,030 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-09-05 13:01:39,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-05 13:01:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-09-05 13:01:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 13:01:39,032 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:39,032 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:39,033 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2040308290, now seen corresponding path program 1 times [2019-09-05 13:01:39,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:39,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:39,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:39,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:39,036 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:01:39,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:39,144 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:01:39,145 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-09-05 13:01:39,147 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [32], [38], [40], [48], [51], [59], [65], [68], [70], [73], [75], [76], [77], [78], [80], [81] [2019-09-05 13:01:39,188 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:01:39,189 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:01:39,314 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:01:39,317 INFO L272 AbstractInterpreter]: Visited 24 different actions 28 times. Merged at 3 different actions 3 times. Never widened. Performed 41 root evaluator evaluations with a maximum evaluation depth of 7. Performed 41 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 2 fixpoints after 2 different actions. Largest state had 13 variables. [2019-09-05 13:01:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:39,321 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:01:39,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:39,322 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 [2019-09-05 13:01:39,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:39,339 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:01:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:39,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-05 13:01:39,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:01:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:01:39,467 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:01:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 13:01:39,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 13:01:39,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2019-09-05 13:01:39,522 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:01:39,523 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 13:01:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 13:01:39,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:01:39,524 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2019-09-05 13:01:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:39,768 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-05 13:01:39,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 13:01:39,769 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-09-05 13:01:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:39,770 INFO L225 Difference]: With dead ends: 46 [2019-09-05 13:01:39,770 INFO L226 Difference]: Without dead ends: 46 [2019-09-05 13:01:39,771 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-09-05 13:01:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-05 13:01:39,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-09-05 13:01:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 13:01:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-09-05 13:01:39,780 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2019-09-05 13:01:39,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:39,782 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-09-05 13:01:39,782 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 13:01:39,782 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-09-05 13:01:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-05 13:01:39,784 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:39,784 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:39,784 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash 911329064, now seen corresponding path program 1 times [2019-09-05 13:01:39,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:39,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:39,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:39,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:39,786 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-05 13:01:39,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:39,861 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:01:39,861 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2019-09-05 13:01:39,861 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [17], [20], [24], [32], [38], [40], [46], [48], [51], [55], [59], [65], [68], [70], [73], [75], [76], [77], [78], [80], [81] [2019-09-05 13:01:39,863 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:01:39,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:01:39,978 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:01:39,979 INFO L272 AbstractInterpreter]: Visited 26 different actions 98 times. Merged at 9 different actions 36 times. Widened at 4 different actions 8 times. Performed 189 root evaluator evaluations with a maximum evaluation depth of 7. Performed 189 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Found 13 fixpoints after 7 different actions. Largest state had 14 variables. [2019-09-05 13:01:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:39,980 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:01:39,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:39,980 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:01:40,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:40,001 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:01:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:40,040 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-05 13:01:40,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:01:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-05 13:01:40,121 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:01:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-05 13:01:40,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:01:40,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2019-09-05 13:01:40,198 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:01:40,198 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 13:01:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 13:01:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-05 13:01:40,199 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 6 states. [2019-09-05 13:01:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:40,291 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-05 13:01:40,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:01:40,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-09-05 13:01:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:40,293 INFO L225 Difference]: With dead ends: 43 [2019-09-05 13:01:40,293 INFO L226 Difference]: Without dead ends: 43 [2019-09-05 13:01:40,293 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-05 13:01:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-05 13:01:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-09-05 13:01:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 13:01:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-09-05 13:01:40,304 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2019-09-05 13:01:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:40,304 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-09-05 13:01:40,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 13:01:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-09-05 13:01:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-05 13:01:40,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:01:40,309 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:01:40,309 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:01:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:01:40,310 INFO L82 PathProgramCache]: Analyzing trace with hash -973854811, now seen corresponding path program 2 times [2019-09-05 13:01:40,310 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:01:40,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:40,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:01:40,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:01:40,312 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:01:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:01:40,444 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-05 13:01:40,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:40,445 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:01:40,445 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:01:40,445 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:01:40,445 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:01:40,446 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:01:40,462 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 13:01:40,462 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:01:40,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-09-05 13:01:40,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:01:40,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-05 13:01:40,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:01:40,525 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:01:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-05 13:01:40,557 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:01:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-09-05 13:01:40,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 13:01:40,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2019-09-05 13:01:40,612 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:01:40,613 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 13:01:40,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 13:01:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-05 13:01:40,614 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 12 states. [2019-09-05 13:01:40,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:01:40,790 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-09-05 13:01:40,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 13:01:40,792 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2019-09-05 13:01:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:01:40,792 INFO L225 Difference]: With dead ends: 41 [2019-09-05 13:01:40,792 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:01:40,793 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-09-05 13:01:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:01:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:01:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:01:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:01:40,797 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2019-09-05 13:01:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:01:40,798 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:01:40,798 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 13:01:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:01:40,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:01:40,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:01:40 BoogieIcfgContainer [2019-09-05 13:01:40,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:01:40,808 INFO L168 Benchmark]: Toolchain (without parser) took 3385.01 ms. Allocated memory was 136.3 MB in the beginning and 276.3 MB in the end (delta: 140.0 MB). Free memory was 83.6 MB in the beginning and 243.5 MB in the end (delta: -159.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-05 13:01:40,810 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 102.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:01:40,812 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.46 ms. Allocated memory is still 136.3 MB. Free memory was 83.4 MB in the beginning and 73.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:40,814 INFO L168 Benchmark]: Boogie Preprocessor took 118.19 ms. Allocated memory was 136.3 MB in the beginning and 196.1 MB in the end (delta: 59.8 MB). Free memory was 73.9 MB in the beginning and 173.4 MB in the end (delta: -99.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:40,815 INFO L168 Benchmark]: RCFGBuilder took 373.67 ms. Allocated memory is still 196.1 MB. Free memory was 173.4 MB in the beginning and 159.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:01:40,816 INFO L168 Benchmark]: TraceAbstraction took 2628.30 ms. Allocated memory was 196.1 MB in the beginning and 276.3 MB in the end (delta: 80.2 MB). Free memory was 158.9 MB in the beginning and 243.5 MB in the end (delta: -84.6 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-05 13:01:40,824 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory was 102.2 MB in the beginning and 102.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.46 ms. Allocated memory is still 136.3 MB. Free memory was 83.4 MB in the beginning and 73.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.19 ms. Allocated memory was 136.3 MB in the beginning and 196.1 MB in the end (delta: 59.8 MB). Free memory was 73.9 MB in the beginning and 173.4 MB in the end (delta: -99.4 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 373.67 ms. Allocated memory is still 196.1 MB. Free memory was 173.4 MB in the beginning and 159.5 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2628.30 ms. Allocated memory was 196.1 MB in the beginning and 276.3 MB in the end (delta: 80.2 MB). Free memory was 158.9 MB in the beginning and 243.5 MB in the end (delta: -84.6 MB). There was no memory consumed. 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, 29 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 110 SDtfs, 94 SDslu, 390 SDs, 0 SdLazy, 351 SolverSat, 56 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 252 GetRequests, 190 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 249 NumberOfCodeBlocks, 226 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 341 ConstructedInterpolants, 0 QuantifiedInterpolants, 24115 SizeOfPredicates, 13 NumberOfNonLiveVariables, 201 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 141/154 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...