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/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:08:56,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:08:56,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:08:56,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:08:56,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 02:08:56,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 02:08:56,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 02:08:56,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 02:08:56,343 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 02:08:56,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 02:08:56,344 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 02:08:56,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 02:08:56,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 02:08:56,346 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 02:08:56,347 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 02:08:56,347 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 [2019-09-10 02:08:56,363 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:08:56,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:08:56,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:08:56,364 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:08:56,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:08:56,365 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:08:56,365 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:08:56,365 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:08:56,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:08:56,366 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:08:56,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:08:56,366 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:08:56,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:08:56,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:08:56,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:08:56,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:08:56,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:08:56,368 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:08:56,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:08:56,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:08:56,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:08:56,368 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:08:56,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:08:56,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:08:56,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:08:56,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:08:56,369 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:08:56,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:08:56,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:08:56,370 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:08:56,398 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:08:56,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:08:56,414 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:08:56,415 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:08:56,416 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:08:56,417 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2019-09-10 02:08:56,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/582d96d3c/c2185bb125b847179fcabbe0884e78e4/FLAGe51f95add [2019-09-10 02:08:56,868 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:08:56,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2019-09-10 02:08:56,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/582d96d3c/c2185bb125b847179fcabbe0884e78e4/FLAGe51f95add [2019-09-10 02:08:57,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/582d96d3c/c2185bb125b847179fcabbe0884e78e4 [2019-09-10 02:08:57,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:08:57,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:08:57,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:08:57,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:08:57,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:08:57,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,311 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 10.09 02:08:57, skipping insertion in model container [2019-09-10 02:08:57,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,318 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:08:57,337 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:08:57,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:08:57,544 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:08:57,558 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:08:57,570 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:08:57,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57 WrapperNode [2019-09-10 02:08:57,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:08:57,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:08:57,572 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:08:57,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:08:57,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (1/1) ... [2019-09-10 02:08:57,688 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:08:57,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:08:57,689 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:08:57,689 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:08:57,690 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (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 [2019-09-10 02:08:57,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:08:57,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:08:57,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 02:08:57,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:08:57,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:08:57,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:08:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:08:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:08:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:08:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:08:57,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:08:57,930 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:08:57,931 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 02:08:57,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:08:57 BoogieIcfgContainer [2019-09-10 02:08:57,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:08:57,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:08:57,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:08:57,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:08:57,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:08:57" (1/3) ... [2019-09-10 02:08:57,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414345e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:08:57, skipping insertion in model container [2019-09-10 02:08:57,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:08:57" (2/3) ... [2019-09-10 02:08:57,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414345e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:08:57, skipping insertion in model container [2019-09-10 02:08:57,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:08:57" (3/3) ... [2019-09-10 02:08:57,948 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2019-09-10 02:08:57,966 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:08:57,977 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:08:58,002 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:08:58,037 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:08:58,037 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:08:58,038 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:08:58,038 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:08:58,038 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:08:58,038 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:08:58,038 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:08:58,038 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:08:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-10 02:08:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 02:08:58,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:08:58,074 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:08:58,079 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:08:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:08:58,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1912775084, now seen corresponding path program 1 times [2019-09-10 02:08:58,086 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:08:58,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:58,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:08:58,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:58,127 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:08:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:08:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:08:58,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:08:58,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 02:08:58,192 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:08:58,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 02:08:58,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 02:08:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:08:58,213 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-10 02:08:58,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:08:58,228 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-09-10 02:08:58,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 02:08:58,229 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-10 02:08:58,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:08:58,237 INFO L225 Difference]: With dead ends: 20 [2019-09-10 02:08:58,237 INFO L226 Difference]: Without dead ends: 13 [2019-09-10 02:08:58,239 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:08:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-10 02:08:58,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-10 02:08:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-10 02:08:58,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-10 02:08:58,269 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2019-09-10 02:08:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:08:58,269 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-10 02:08:58,269 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 02:08:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-10 02:08:58,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 02:08:58,270 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:08:58,271 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:08:58,271 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:08:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:08:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash -2027291688, now seen corresponding path program 1 times [2019-09-10 02:08:58,272 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:08:58,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:58,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:08:58,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:58,273 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:08:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:08:58,555 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2019-09-10 02:08:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:08:58,666 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:08:58,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-10 02:08:58,666 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:08:58,668 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 02:08:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 02:08:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-10 02:08:58,669 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-09-10 02:08:58,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:08:58,847 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-10 02:08:58,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 02:08:58,848 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-09-10 02:08:58,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:08:58,849 INFO L225 Difference]: With dead ends: 18 [2019-09-10 02:08:58,849 INFO L226 Difference]: Without dead ends: 14 [2019-09-10 02:08:58,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-10 02:08:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-10 02:08:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-10 02:08:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-10 02:08:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-10 02:08:58,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-10 02:08:58,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:08:58,861 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-10 02:08:58,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 02:08:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-10 02:08:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 02:08:58,863 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:08:58,863 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:08:58,863 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:08:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:08:58,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1190399537, now seen corresponding path program 1 times [2019-09-10 02:08:58,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:08:58,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:58,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:08:58,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:58,866 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:08:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:08:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:08:59,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:08:59,069 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:08:59,070 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-10 02:08:59,081 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [15], [17], [23], [30], [33], [35], [41], [42], [43], [45] [2019-09-10 02:08:59,123 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:08:59,124 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:08:59,293 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:08:59,295 INFO L272 AbstractInterpreter]: Visited 13 different actions 41 times. Merged at 3 different actions 12 times. Widened at 1 different actions 2 times. Performed 116 root evaluator evaluations with a maximum evaluation depth of 5. Performed 116 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2019-09-10 02:08:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:08:59,300 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:08:59,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:08:59,301 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) [2019-09-10 02:08:59,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:08:59,332 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:08:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:08:59,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-10 02:08:59,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:08:59,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:08:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:08:59,469 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:08:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:08:59,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:08:59,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2019-09-10 02:08:59,582 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:08:59,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-10 02:08:59,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-10 02:08:59,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-09-10 02:08:59,584 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2019-09-10 02:08:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:08:59,715 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-10 02:08:59,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 02:08:59,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2019-09-10 02:08:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:08:59,717 INFO L225 Difference]: With dead ends: 19 [2019-09-10 02:08:59,717 INFO L226 Difference]: Without dead ends: 15 [2019-09-10 02:08:59,718 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-09-10 02:08:59,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-10 02:08:59,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-10 02:08:59,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-10 02:08:59,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-10 02:08:59,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-10 02:08:59,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:08:59,724 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-10 02:08:59,724 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-10 02:08:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-10 02:08:59,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 02:08:59,725 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:08:59,725 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:08:59,726 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:08:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:08:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1016546632, now seen corresponding path program 2 times [2019-09-10 02:08:59,727 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:08:59,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:59,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:08:59,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:08:59,730 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:08:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:08:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:08:59,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:08:59,983 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:08:59,983 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:08:59,984 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:08:59,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:08:59,984 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) [2019-09-10 02:09:00,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:09:00,001 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:09:00,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 02:09:00,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:09:00,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-10 02:09:00,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:09:00,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:09:00,115 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:09:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:09:00,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:09:00,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2019-09-10 02:09:00,257 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:09:00,258 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-10 02:09:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-10 02:09:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-09-10 02:09:00,260 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2019-09-10 02:09:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:00,436 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-09-10 02:09:00,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-10 02:09:00,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-09-10 02:09:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:00,438 INFO L225 Difference]: With dead ends: 23 [2019-09-10 02:09:00,438 INFO L226 Difference]: Without dead ends: 17 [2019-09-10 02:09:00,439 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2019-09-10 02:09:00,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-10 02:09:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-10 02:09:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-10 02:09:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-10 02:09:00,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-09-10 02:09:00,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:00,443 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-10 02:09:00,443 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-10 02:09:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-10 02:09:00,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-10 02:09:00,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:09:00,444 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:09:00,444 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:09:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:09:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash -353156712, now seen corresponding path program 3 times [2019-09-10 02:09:00,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:09:00,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:00,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:09:00,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:09:00,447 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:09:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:09:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 02:09:00,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:00,636 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:09:00,636 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:09:00,636 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:09:00,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:09:00,637 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) [2019-09-10 02:09:00,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 02:09:00,655 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:09:00,667 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 02:09:00,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:09:00,669 WARN L254 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-10 02:09:00,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:09:00,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:09:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:09:00,795 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:09:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:09:00,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:09:00,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 22 [2019-09-10 02:09:00,970 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:09:00,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-10 02:09:00,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-10 02:09:00,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2019-09-10 02:09:00,973 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2019-09-10 02:09:01,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:09:01,135 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2019-09-10 02:09:01,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-10 02:09:01,136 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2019-09-10 02:09:01,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:09:01,136 INFO L225 Difference]: With dead ends: 18 [2019-09-10 02:09:01,136 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:09:01,137 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2019-09-10 02:09:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:09:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:09:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:09:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:09:01,138 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-09-10 02:09:01,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:09:01,138 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:09:01,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-10 02:09:01,138 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:09:01,139 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:09:01,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:09:01 BoogieIcfgContainer [2019-09-10 02:09:01,144 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:09:01,146 INFO L168 Benchmark]: Toolchain (without parser) took 3842.88 ms. Allocated memory was 135.3 MB in the beginning and 254.3 MB in the end (delta: 119.0 MB). Free memory was 91.6 MB in the beginning and 140.3 MB in the end (delta: -48.7 MB). Peak memory consumption was 70.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:01,147 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 135.3 MB. Free memory was 109.7 MB in the beginning and 109.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:09:01,147 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.37 ms. Allocated memory is still 135.3 MB. Free memory was 91.4 MB in the beginning and 82.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:01,148 INFO L168 Benchmark]: Boogie Preprocessor took 116.94 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 82.2 MB in the beginning and 176.8 MB in the end (delta: -94.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:01,149 INFO L168 Benchmark]: RCFGBuilder took 244.49 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 164.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:01,151 INFO L168 Benchmark]: TraceAbstraction took 3203.23 ms. Allocated memory was 199.8 MB in the beginning and 254.3 MB in the end (delta: 54.5 MB). Free memory was 164.3 MB in the beginning and 140.3 MB in the end (delta: 24.0 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. [2019-09-10 02:09:01,155 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 135.3 MB. Free memory was 109.7 MB in the beginning and 109.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.37 ms. Allocated memory is still 135.3 MB. Free memory was 91.4 MB in the beginning and 82.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.94 ms. Allocated memory was 135.3 MB in the beginning and 199.8 MB in the end (delta: 64.5 MB). Free memory was 82.2 MB in the beginning and 176.8 MB in the end (delta: -94.6 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.49 ms. Allocated memory is still 199.8 MB. Free memory was 176.8 MB in the beginning and 164.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3203.23 ms. Allocated memory was 199.8 MB in the beginning and 254.3 MB in the end (delta: 54.5 MB). Free memory was 164.3 MB in the beginning and 140.3 MB in the end (delta: 24.0 MB). Peak memory consumption was 78.5 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, 20 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 31 SDslu, 176 SDs, 0 SdLazy, 208 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 110 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 11716 SizeOfPredicates, 21 NumberOfNonLiveVariables, 138 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 1/42 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...