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-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:56:34,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:56:34,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:56:34,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:56:34,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:56:34,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:56:34,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:56:34,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:56:34,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:56:34,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:56:34,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:56:34,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:56:34,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:56:34,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:56:34,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:56:34,379 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 [2019-09-03 20:56:34,393 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:56:34,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:56:34,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:56:34,394 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:56:34,395 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:56:34,395 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:56:34,395 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:56:34,395 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:56:34,396 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:56:34,396 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:56:34,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:56:34,397 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:56:34,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:56:34,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:56:34,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:56:34,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:56:34,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:56:34,398 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:56:34,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:56:34,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:56:34,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:56:34,399 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:56:34,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:56:34,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:56:34,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:56:34,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:56:34,400 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:56:34,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:56:34,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:56:34,400 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:56:34,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:56:34,459 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:56:34,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:56:34,465 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:56:34,465 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:56:34,466 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2019-09-03 20:56:34,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af555414d/504cf838069c4e79926caa735fd1d34e/FLAG3579c3fc9 [2019-09-03 20:56:34,914 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:56:34,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2019-09-03 20:56:34,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af555414d/504cf838069c4e79926caa735fd1d34e/FLAG3579c3fc9 [2019-09-03 20:56:35,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af555414d/504cf838069c4e79926caa735fd1d34e [2019-09-03 20:56:35,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:56:35,357 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:56:35,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:56:35,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:56:35,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:56:35,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1896e9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35, skipping insertion in model container [2019-09-03 20:56:35,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,373 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:56:35,389 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:56:35,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:56:35,607 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:56:35,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:56:35,645 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:56:35,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35 WrapperNode [2019-09-03 20:56:35,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:56:35,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:56:35,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:56:35,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:56:35,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (1/1) ... [2019-09-03 20:56:35,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:56:35,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:56:35,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:56:35,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:56:35,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (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 [2019-09-03 20:56:35,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:56:35,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:56:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:56:35,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:56:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:56:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:56:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:56:35,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:56:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:56:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:56:35,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:56:35,977 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:56:35,977 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:56:35,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:56:35 BoogieIcfgContainer [2019-09-03 20:56:35,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:56:35,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:56:35,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:56:35,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:56:35,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:56:35" (1/3) ... [2019-09-03 20:56:35,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e67ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:56:35, skipping insertion in model container [2019-09-03 20:56:35,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:56:35" (2/3) ... [2019-09-03 20:56:35,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e67ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:56:35, skipping insertion in model container [2019-09-03 20:56:35,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:56:35" (3/3) ... [2019-09-03 20:56:35,986 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2019-09-03 20:56:35,996 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:56:36,003 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:56:36,020 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:56:36,046 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:56:36,046 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:56:36,046 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:56:36,046 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:56:36,047 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:56:36,047 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:56:36,047 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:56:36,047 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:56:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-03 20:56:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:56:36,071 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:36,072 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:36,074 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1875203651, now seen corresponding path program 1 times [2019-09-03 20:56:36,082 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:36,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:36,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:36,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:36,122 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:36,265 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:56:36,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:56:36,266 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:56:36,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:56:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:56:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:56:36,335 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2019-09-03 20:56:36,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:36,477 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-09-03 20:56:36,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:56:36,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:56:36,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:36,488 INFO L225 Difference]: With dead ends: 26 [2019-09-03 20:56:36,489 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 20:56:36,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:56:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 20:56:36,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-09-03 20:56:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 20:56:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-03 20:56:36,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 10 [2019-09-03 20:56:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:36,529 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-03 20:56:36,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:56:36,529 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-03 20:56:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 20:56:36,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:36,530 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:36,531 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1632080392, now seen corresponding path program 1 times [2019-09-03 20:56:36,531 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:36,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:36,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:36,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:36,533 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:36,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:36,607 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:56:36,608 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-03 20:56:36,610 INFO L207 CegarAbsIntRunner]: [0], [4], [12], [15], [21], [24], [26], [29], [31], [32], [33], [34], [36], [37] [2019-09-03 20:56:36,640 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:56:36,641 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:56:36,801 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:56:36,804 INFO L272 AbstractInterpreter]: Visited 14 different actions 59 times. Merged at 3 different actions 15 times. Widened at 1 different actions 1 times. Performed 75 root evaluator evaluations with a maximum evaluation depth of 5. Performed 75 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-09-03 20:56:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:36,809 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:56:36,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:36,809 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 [2019-09-03 20:56:36,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:36,820 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:56:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:36,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:56:36,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:56:36,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:36,884 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:56:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:56:36,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:56:36,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2019-09-03 20:56:36,931 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:56:36,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:56:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:56:36,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:56:36,933 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2019-09-03 20:56:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:36,988 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-03 20:56:36,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:56:36,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-09-03 20:56:36,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:36,990 INFO L225 Difference]: With dead ends: 28 [2019-09-03 20:56:36,990 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 20:56:36,991 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:56:36,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 20:56:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-03 20:56:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-03 20:56:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-03 20:56:36,997 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2019-09-03 20:56:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:36,997 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-03 20:56:36,998 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:56:36,998 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-03 20:56:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:56:36,999 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:36,999 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:36,999 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:37,000 INFO L82 PathProgramCache]: Analyzing trace with hash 282820957, now seen corresponding path program 2 times [2019-09-03 20:56:37,000 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:37,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:37,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:37,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:37,002 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:56:37,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:37,061 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:56:37,061 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:56:37,062 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:56:37,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:37,062 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) [2019-09-03 20:56:37,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:56:37,080 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 [2019-09-03 20:56:37,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 20:56:37,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:56:37,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-03 20:56:37,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:56:37,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:56:37,135 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:56:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:56:37,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:56:37,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2019-09-03 20:56:37,202 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:56:37,203 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:56:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:56:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:56:37,205 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2019-09-03 20:56:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:37,310 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-03 20:56:37,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:56:37,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2019-09-03 20:56:37,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:37,312 INFO L225 Difference]: With dead ends: 35 [2019-09-03 20:56:37,312 INFO L226 Difference]: Without dead ends: 35 [2019-09-03 20:56:37,313 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:56:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-03 20:56:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-03 20:56:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-03 20:56:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-03 20:56:37,319 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2019-09-03 20:56:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:37,319 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-03 20:56:37,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:56:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-03 20:56:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:56:37,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:37,321 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:37,321 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:37,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:37,322 INFO L82 PathProgramCache]: Analyzing trace with hash 864272984, now seen corresponding path program 3 times [2019-09-03 20:56:37,322 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:37,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:37,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:56:37,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:37,323 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:56:37,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:37,398 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:56:37,399 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:56:37,399 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:56:37,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:37,399 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) [2019-09-03 20:56:37,416 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:56:37,416 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 [2019-09-03 20:56:37,435 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:56:37,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:56:37,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:56:37,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:56:37,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:56:37,479 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:56:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:56:37,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:56:37,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2019-09-03 20:56:37,570 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:56:37,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:56:37,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:56:37,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:56:37,571 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 10 states. [2019-09-03 20:56:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:37,650 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-03 20:56:37,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:56:37,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-09-03 20:56:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:37,652 INFO L225 Difference]: With dead ends: 42 [2019-09-03 20:56:37,652 INFO L226 Difference]: Without dead ends: 42 [2019-09-03 20:56:37,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:56:37,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-03 20:56:37,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-03 20:56:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:56:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-03 20:56:37,658 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2019-09-03 20:56:37,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:37,659 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-03 20:56:37,659 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:56:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-03 20:56:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-03 20:56:37,661 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:37,661 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:37,661 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:37,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1759150333, now seen corresponding path program 4 times [2019-09-03 20:56:37,662 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:37,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:37,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:56:37,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:37,663 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 20:56:37,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:37,762 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:56:37,762 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:56:37,762 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:56:37,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:37,763 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:56:37,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:37,779 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:56:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:37,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:56:37,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:56:37,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 20:56:37,831 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:56:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-03 20:56:37,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:56:37,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2019-09-03 20:56:37,936 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:56:37,937 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:56:37,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:56:37,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:56:37,938 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 11 states. [2019-09-03 20:56:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:38,036 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-03 20:56:38,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:56:38,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-09-03 20:56:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:38,038 INFO L225 Difference]: With dead ends: 49 [2019-09-03 20:56:38,038 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 20:56:38,039 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:56:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 20:56:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-03 20:56:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:56:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-03 20:56:38,045 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2019-09-03 20:56:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:38,046 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-03 20:56:38,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:56:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-03 20:56:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-03 20:56:38,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:56:38,048 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:56:38,048 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:56:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:56:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1171001672, now seen corresponding path program 5 times [2019-09-03 20:56:38,049 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:56:38,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:38,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:56:38,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:56:38,050 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:56:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:56:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:56:38,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:38,170 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:56:38,170 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 20:56:38,170 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 20:56:38,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:56:38,171 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:56:38,193 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:56:38,194 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:56:38,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-03 20:56:38,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:56:38,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 20:56:38,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:56:38,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-03 20:56:38,328 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:56:38,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:38,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:56:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-03 20:56:38,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:56:38,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 17 [2019-09-03 20:56:38,425 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:56:38,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:56:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:56:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:56:38,426 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 16 states. [2019-09-03 20:56:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:56:38,557 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-09-03 20:56:38,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:56:38,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2019-09-03 20:56:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:56:38,558 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:56:38,558 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:56:38,559 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:56:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:56:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:56:38,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:56:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:56:38,561 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-09-03 20:56:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:56:38,562 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:56:38,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:56:38,562 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:56:38,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:56:38,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:56:38 BoogieIcfgContainer [2019-09-03 20:56:38,567 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:56:38,572 INFO L168 Benchmark]: Toolchain (without parser) took 3212.39 ms. Allocated memory was 141.6 MB in the beginning and 256.9 MB in the end (delta: 115.3 MB). Free memory was 88.8 MB in the beginning and 191.7 MB in the end (delta: -102.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:38,574 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:56:38,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.40 ms. Allocated memory is still 141.6 MB. Free memory was 88.6 MB in the beginning and 79.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:38,576 INFO L168 Benchmark]: Boogie Preprocessor took 117.18 ms. Allocated memory was 141.6 MB in the beginning and 199.2 MB in the end (delta: 57.7 MB). Free memory was 79.6 MB in the beginning and 177.3 MB in the end (delta: -97.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:38,577 INFO L168 Benchmark]: RCFGBuilder took 215.20 ms. Allocated memory is still 199.2 MB. Free memory was 177.3 MB in the beginning and 166.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:38,583 INFO L168 Benchmark]: TraceAbstraction took 2587.69 ms. Allocated memory was 199.2 MB in the beginning and 256.9 MB in the end (delta: 57.7 MB). Free memory was 165.6 MB in the beginning and 191.7 MB in the end (delta: -26.0 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:56:38,589 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 107.5 MB in the beginning and 107.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.40 ms. Allocated memory is still 141.6 MB. Free memory was 88.6 MB in the beginning and 79.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.18 ms. Allocated memory was 141.6 MB in the beginning and 199.2 MB in the end (delta: 57.7 MB). Free memory was 79.6 MB in the beginning and 177.3 MB in the end (delta: -97.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 215.20 ms. Allocated memory is still 199.2 MB. Free memory was 177.3 MB in the beginning and 166.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2587.69 ms. Allocated memory was 199.2 MB in the beginning and 256.9 MB in the end (delta: 57.7 MB). Free memory was 165.6 MB in the beginning and 191.7 MB in the end (delta: -26.0 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 2.5s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 63 SDslu, 272 SDs, 0 SdLazy, 286 SolverSat, 44 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, 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, 6 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 320 NumberOfCodeBlocks, 299 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 459 ConstructedInterpolants, 0 QuantifiedInterpolants, 27865 SizeOfPredicates, 11 NumberOfNonLiveVariables, 254 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 406/600 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...