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/nla-digbench/mannadiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:12:45,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:12:45,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:12:45,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:12:45,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:12:45,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:12:45,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:12:45,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:12:45,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:12:45,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:12:45,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:12:45,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-09-03 21:12:45,692 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 21:12:45,707 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:12:45,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:12:45,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:12:45,708 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:12:45,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:12:45,708 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:12:45,709 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:12:45,709 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:12:45,709 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:12:45,709 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:12:45,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:12:45,710 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:12:45,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:12:45,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:12:45,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:12:45,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:12:45,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:12:45,711 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:12:45,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:12:45,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:12:45,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:12:45,712 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:12:45,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:12:45,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:12:45,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:12:45,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:12:45,713 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:12:45,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:12:45,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:12:45,714 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:12:45,741 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:12:45,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:12:45,756 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:12:45,758 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:12:45,758 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:12:45,759 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/mannadiv.c [2019-09-03 21:12:45,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4696f5d3d/48b8913c2e6d4d6c842c2c0fb18f9838/FLAG28909c86d [2019-09-03 21:12:46,252 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:12:46,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/mannadiv.c [2019-09-03 21:12:46,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4696f5d3d/48b8913c2e6d4d6c842c2c0fb18f9838/FLAG28909c86d [2019-09-03 21:12:46,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4696f5d3d/48b8913c2e6d4d6c842c2c0fb18f9838 [2019-09-03 21:12:46,687 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:12:46,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:12:46,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:12:46,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:12:46,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:12:46,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:46,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee06c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46, skipping insertion in model container [2019-09-03 21:12:46,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:46,704 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:12:46,721 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:12:46,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:12:46,928 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:12:46,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:12:46,961 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:12:46,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46 WrapperNode [2019-09-03 21:12:46,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:12:46,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:12:46,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:12:46,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:12:47,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:47,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:47,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:47,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:47,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:47,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:47,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (1/1) ... [2019-09-03 21:12:47,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:12:47,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:12:47,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:12:47,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:12:47,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (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 21:12:47,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:12:47,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:12:47,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:12:47,139 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:12:47,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:12:47,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 21:12:47,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:12:47,139 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:12:47,139 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:12:47,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:12:47,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:12:47,322 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:12:47,322 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:12:47,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:12:47 BoogieIcfgContainer [2019-09-03 21:12:47,324 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:12:47,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:12:47,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:12:47,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:12:47,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:12:46" (1/3) ... [2019-09-03 21:12:47,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138dc268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:12:47, skipping insertion in model container [2019-09-03 21:12:47,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:12:46" (2/3) ... [2019-09-03 21:12:47,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@138dc268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:12:47, skipping insertion in model container [2019-09-03 21:12:47,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:12:47" (3/3) ... [2019-09-03 21:12:47,333 INFO L109 eAbstractionObserver]: Analyzing ICFG mannadiv.c [2019-09-03 21:12:47,344 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:12:47,367 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:12:47,417 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:12:47,452 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:12:47,453 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:12:47,453 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:12:47,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:12:47,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:12:47,455 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:12:47,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:12:47,455 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:12:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 21:12:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:12:47,479 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:47,480 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:47,482 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:47,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:47,486 INFO L82 PathProgramCache]: Analyzing trace with hash -858950785, now seen corresponding path program 1 times [2019-09-03 21:12:47,488 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:47,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:47,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:47,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:47,525 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:47,592 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 21:12:47,594 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:12:47,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:12:47,595 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:47,598 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:12:47,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:12:47,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:12:47,611 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 21:12:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:47,625 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 21:12:47,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:12:47,626 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:12:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:47,633 INFO L225 Difference]: With dead ends: 21 [2019-09-03 21:12:47,633 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 21:12:47,635 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 [2019-09-03 21:12:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 21:12:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 21:12:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 21:12:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 21:12:47,665 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 21:12:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:47,666 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 21:12:47,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:12:47,666 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 21:12:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:12:47,667 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:47,667 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:47,667 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-09-03 21:12:47,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:47,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:47,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:47,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:47,670 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:47,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:47,678 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:47,678 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:12:47,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:47,690 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:12:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:47,708 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-03 21:12:47,708 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:12:47,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:47,709 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:47,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:47,726 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:47,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 21:12:47,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:47,828 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 21:12:47,828 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:47,880 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 21:12:47,883 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:12:47,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:12:47,884 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:47,885 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:12:47,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:12:47,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:12:47,886 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 21:12:47,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:47,964 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-03 21:12:47,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:12:47,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:12:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:47,967 INFO L225 Difference]: With dead ends: 25 [2019-09-03 21:12:47,968 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 21:12:47,969 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:12:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 21:12:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-09-03 21:12:47,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-03 21:12:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-09-03 21:12:47,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2019-09-03 21:12:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:47,977 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-09-03 21:12:47,977 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:12:47,977 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-09-03 21:12:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 21:12:47,978 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:47,979 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:47,979 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:47,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1067575333, now seen corresponding path program 1 times [2019-09-03 21:12:47,980 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:47,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:47,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:47,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:47,982 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:47,989 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:47,989 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:47,990 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) [2019-09-03 21:12:48,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:48,018 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:12:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:48,032 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-03 21:12:48,035 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [32], [35], [37], [40], [42], [43], [44], [45], [47], [48], [49] [2019-09-03 21:12:48,079 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:48,079 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:48,280 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:48,282 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 8. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 7 variables. [2019-09-03 21:12:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:48,286 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:48,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:48,286 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 21:12:48,323 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:48,323 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:12:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:48,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 21:12:48,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:48,395 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:48,468 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:12:48,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-09-03 21:12:48,468 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:48,469 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 21:12:48,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 21:12:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:12:48,470 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2019-09-03 21:12:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:48,569 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-09-03 21:12:48,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:12:48,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-09-03 21:12:48,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:48,570 INFO L225 Difference]: With dead ends: 29 [2019-09-03 21:12:48,570 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 21:12:48,571 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-09-03 21:12:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 21:12:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-09-03 21:12:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 21:12:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-03 21:12:48,576 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-09-03 21:12:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:48,576 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-03 21:12:48,577 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 21:12:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-03 21:12:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 21:12:48,578 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:48,578 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:48,578 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash 427538464, now seen corresponding path program 1 times [2019-09-03 21:12:48,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:48,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:48,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:48,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:48,581 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:48,587 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:48,587 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:48,587 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_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 (exit command is (exit), workingDir is null) [2019-09-03 21:12:48,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:48,611 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:12:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:48,637 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2019-09-03 21:12:48,637 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [22], [32], [35], [37], [40], [42], [43], [44], [45], [47], [48] [2019-09-03 21:12:48,639 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:48,639 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:48,697 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:48,698 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 8. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 7 variables. [2019-09-03 21:12:48,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:48,699 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:48,699 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:48,699 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:12:48,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:48,726 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:48,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 21:12:48,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:48,806 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 21:12:48,806 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:12:48,872 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 21:12:48,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2019-09-03 21:12:48,872 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:12:48,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 21:12:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 21:12:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:12:48,874 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2019-09-03 21:12:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:48,924 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-09-03 21:12:48,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:12:48,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-03 21:12:48,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:48,926 INFO L225 Difference]: With dead ends: 27 [2019-09-03 21:12:48,926 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 21:12:48,926 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-03 21:12:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 21:12:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-03 21:12:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 21:12:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-09-03 21:12:48,931 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2019-09-03 21:12:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:48,931 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-09-03 21:12:48,931 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 21:12:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-09-03 21:12:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 21:12:48,932 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:12:48,932 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:12:48,933 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:12:48,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:48,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1265440978, now seen corresponding path program 1 times [2019-09-03 21:12:48,933 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:12:48,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:48,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:48,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:12:48,935 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:12:48,941 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:12:48,941 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:12:48,941 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 21:12:48,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:48,966 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:12:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:48,978 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2019-09-03 21:12:48,979 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [22], [32], [35], [37], [40], [42], [43], [44], [45], [47], [48], [49] [2019-09-03 21:12:48,980 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:12:48,981 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:12:49,019 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:12:49,019 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 26 root evaluator evaluations with a maximum evaluation depth of 8. Performed 26 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 7 variables. [2019-09-03 21:12:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:12:49,019 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:12:49,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:12:49,020 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:12:49,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:12:49,044 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:12:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:12:49,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 21:12:49,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:12:49,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:49,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-03 21:12:49,148 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:12:49,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:49,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:12:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-03 21:12:49,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:12:49,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-03 21:12:49,259 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:12:49,260 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 21:12:49,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 21:12:49,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-09-03 21:12:49,261 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2019-09-03 21:12:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:12:49,355 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2019-09-03 21:12:49,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:12:49,356 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2019-09-03 21:12:49,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:12:49,357 INFO L225 Difference]: With dead ends: 23 [2019-09-03 21:12:49,357 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 21:12:49,358 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-09-03 21:12:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 21:12:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 21:12:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 21:12:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 21:12:49,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2019-09-03 21:12:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:12:49,359 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 21:12:49,359 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 21:12:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 21:12:49,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 21:12:49,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 09:12:49 BoogieIcfgContainer [2019-09-03 21:12:49,365 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 21:12:49,368 INFO L168 Benchmark]: Toolchain (without parser) took 2677.77 ms. Allocated memory was 131.1 MB in the beginning and 218.6 MB in the end (delta: 87.6 MB). Free memory was 86.6 MB in the beginning and 101.8 MB in the end (delta: -15.3 MB). Peak memory consumption was 72.3 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:49,371 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 131.1 MB. Free memory was 105.3 MB in the beginning and 105.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:12:49,372 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.83 ms. Allocated memory is still 131.1 MB. Free memory was 86.4 MB in the beginning and 77.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:49,373 INFO L168 Benchmark]: Boogie Preprocessor took 118.92 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 77.0 MB in the beginning and 174.5 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:49,375 INFO L168 Benchmark]: RCFGBuilder took 241.93 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 162.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:49,381 INFO L168 Benchmark]: TraceAbstraction took 2040.26 ms. Allocated memory was 198.2 MB in the beginning and 218.6 MB in the end (delta: 20.4 MB). Free memory was 162.3 MB in the beginning and 101.8 MB in the end (delta: 60.4 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. [2019-09-03 21:12:49,386 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 131.1 MB. Free memory was 105.3 MB in the beginning and 105.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.83 ms. Allocated memory is still 131.1 MB. Free memory was 86.4 MB in the beginning and 77.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.92 ms. Allocated memory was 131.1 MB in the beginning and 198.2 MB in the end (delta: 67.1 MB). Free memory was 77.0 MB in the beginning and 174.5 MB in the end (delta: -97.5 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 241.93 ms. Allocated memory is still 198.2 MB. Free memory was 174.5 MB in the beginning and 162.3 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2040.26 ms. Allocated memory was 198.2 MB in the beginning and 218.6 MB in the end (delta: 20.4 MB). Free memory was 162.3 MB in the beginning and 101.8 MB in the end (delta: 60.4 MB). Peak memory consumption was 80.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 5 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 67 SDtfs, 35 SDslu, 172 SDs, 0 SdLazy, 132 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 9522 SizeOfPredicates, 15 NumberOfNonLiveVariables, 204 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 30/34 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...