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/floats-esbmc-regression/Float_div.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:40:26,006 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:40:26,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:40:26,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:40:26,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 01:40:26,046 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 01:40:26,046 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 01:40:26,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 01:40:26,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 01:40:26,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 01:40:26,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 01:40:26,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 01:40:26,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:40:26,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:40:26,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:40:26,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 01:40:26,065 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:40:26,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:40:26,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:40:26,066 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:40:26,067 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:40:26,067 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:40:26,067 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:40:26,068 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:40:26,068 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:40:26,068 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:40:26,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:40:26,069 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:40:26,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:40:26,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:40:26,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:40:26,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:40:26,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:40:26,070 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:40:26,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:40:26,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:40:26,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:40:26,071 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:40:26,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:40:26,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:40:26,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:40:26,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:40:26,072 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:40:26,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:40:26,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:40:26,073 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:40:26,100 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:40:26,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:40:26,116 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:40:26,117 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:40:26,117 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:40:26,118 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-esbmc-regression/Float_div.i [2019-09-10 01:40:26,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff1ff26a/779ec8f5c2584b818603a1abce8703e8/FLAGcf7460007 [2019-09-10 01:40:26,629 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:40:26,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/Float_div.i [2019-09-10 01:40:26,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff1ff26a/779ec8f5c2584b818603a1abce8703e8/FLAGcf7460007 [2019-09-10 01:40:27,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff1ff26a/779ec8f5c2584b818603a1abce8703e8 [2019-09-10 01:40:27,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:40:27,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:40:27,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:27,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:40:27,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:40:27,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f766b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27, skipping insertion in model container [2019-09-10 01:40:27,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,047 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:40:27,058 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:40:27,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:27,236 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:40:27,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:27,266 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:40:27,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27 WrapperNode [2019-09-10 01:40:27,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:27,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:40:27,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:40:27,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:40:27,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... [2019-09-10 01:40:27,378 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:40:27,379 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:40:27,379 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:40:27,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:40:27,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:40:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:40:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:40:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 01:40:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:40:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:40:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 01:40:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:40:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:40:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:40:27,563 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:40:27,563 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 01:40:27,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:27 BoogieIcfgContainer [2019-09-10 01:40:27,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:40:27,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:40:27,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:40:27,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:40:27,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:40:27" (1/3) ... [2019-09-10 01:40:27,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49db6da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:27, skipping insertion in model container [2019-09-10 01:40:27,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:27" (2/3) ... [2019-09-10 01:40:27,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49db6da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:27, skipping insertion in model container [2019-09-10 01:40:27,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:27" (3/3) ... [2019-09-10 01:40:27,573 INFO L109 eAbstractionObserver]: Analyzing ICFG Float_div.i [2019-09-10 01:40:27,582 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:40:27,589 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:40:27,608 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:40:27,638 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:40:27,638 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:40:27,638 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:40:27,639 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:40:27,640 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:40:27,641 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:40:27,641 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:40:27,641 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:40:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-10 01:40:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 01:40:27,661 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:27,662 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:27,664 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2019-09-10 01:40:27,672 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:27,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:27,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:27,709 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:27,804 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:40:27,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:40:27,805 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:27,824 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:40:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:40:27,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:40:27,860 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-09-10 01:40:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:27,918 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-10 01:40:27,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:40:27,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-10 01:40:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:27,930 INFO L225 Difference]: With dead ends: 19 [2019-09-10 01:40:27,930 INFO L226 Difference]: Without dead ends: 12 [2019-09-10 01:40:27,932 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:40:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-10 01:40:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-10 01:40:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-10 01:40:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-10 01:40:27,991 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-10 01:40:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:27,991 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-10 01:40:27,992 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:40:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-10 01:40:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 01:40:27,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:27,993 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:27,993 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash -429188558, now seen corresponding path program 1 times [2019-09-10 01:40:27,994 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:27,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:27,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:27,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:27,996 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:28,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:28,054 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:28,055 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-09-10 01:40:28,057 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [20], [23], [25], [31], [32], [33], [35] [2019-09-10 01:40:28,102 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:40:28,102 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:40:28,202 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:40:28,204 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:40:28,278 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:40:28,280 INFO L272 AbstractInterpreter]: Visited 11 different actions 27 times. Merged at 2 different actions 6 times. Widened at 1 different actions 1 times. Performed 63 root evaluator evaluations with a maximum evaluation depth of 3. Performed 63 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2019-09-10 01:40:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:28,285 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:40:28,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:28,285 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 [2019-09-10 01:40:28,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:28,303 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:40:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:28,320 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 01:40:28,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:28,386 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:28,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:28,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-10 01:40:28,434 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:28,435 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:40:28,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:40:28,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-10 01:40:28,436 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-09-10 01:40:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:28,472 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-10 01:40:28,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:40:28,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-09-10 01:40:28,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:28,474 INFO L225 Difference]: With dead ends: 13 [2019-09-10 01:40:28,475 INFO L226 Difference]: Without dead ends: 13 [2019-09-10 01:40:28,476 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-10 01:40:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-10 01:40:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-10 01:40:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-10 01:40:28,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-10 01:40:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:28,480 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-10 01:40:28,480 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:40:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-10 01:40:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 01:40:28,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:28,481 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:28,482 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:28,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -384405667, now seen corresponding path program 2 times [2019-09-10 01:40:28,482 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:28,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:28,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:28,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:28,484 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:28,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:28,547 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:28,547 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:28,547 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:28,547 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:28,548 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 [2019-09-10 01:40:28,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:28,572 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 01:40:28,583 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:28,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:28,584 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-10 01:40:28,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:28,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:28,619 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:40:28,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:28,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2019-09-10 01:40:28,661 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:28,662 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:40:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:40:28,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:28,663 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-10 01:40:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:28,714 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-10 01:40:28,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:40:28,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-10 01:40:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:28,716 INFO L225 Difference]: With dead ends: 14 [2019-09-10 01:40:28,716 INFO L226 Difference]: Without dead ends: 14 [2019-09-10 01:40:28,717 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:40:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-10 01:40:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-10 01:40:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-10 01:40:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-10 01:40:28,720 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-10 01:40:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:28,720 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-10 01:40:28,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:40:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-10 01:40:28,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 01:40:28,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:28,722 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:28,722 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1003863954, now seen corresponding path program 3 times [2019-09-10 01:40:28,723 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:28,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:28,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:28,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:28,725 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:28,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:28,786 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:28,786 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:28,786 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:28,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:28,787 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:40:28,804 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 01:40:28,804 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:28,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 01:40:28,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:28,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-10 01:40:28,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:28,863 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-10 01:40:28,958 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:28,958 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2019-09-10 01:40:28,958 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:28,959 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 01:40:28,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 01:40:28,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-09-10 01:40:28,959 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-09-10 01:40:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:29,025 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 01:40:29,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 01:40:29,026 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-10 01:40:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:29,027 INFO L225 Difference]: With dead ends: 15 [2019-09-10 01:40:29,027 INFO L226 Difference]: Without dead ends: 15 [2019-09-10 01:40:29,027 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-09-10 01:40:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-10 01:40:29,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-10 01:40:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-10 01:40:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-10 01:40:29,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-10 01:40:29,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:29,033 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-10 01:40:29,033 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 01:40:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-10 01:40:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 01:40:29,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:29,034 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:29,035 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:29,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:29,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1090549245, now seen corresponding path program 4 times [2019-09-10 01:40:29,035 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:29,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:29,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,037 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:29,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,128 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:29,128 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:29,128 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:29,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,129 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 [2019-09-10 01:40:29,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:29,140 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:40:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:29,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 01:40:29,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:29,205 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 01:40:29,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:29,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2019-09-10 01:40:29,254 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:29,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 01:40:29,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 01:40:29,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:40:29,255 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-09-10 01:40:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:29,340 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-09-10 01:40:29,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:40:29,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-09-10 01:40:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:29,342 INFO L225 Difference]: With dead ends: 16 [2019-09-10 01:40:29,344 INFO L226 Difference]: Without dead ends: 16 [2019-09-10 01:40:29,345 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-09-10 01:40:29,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-10 01:40:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-10 01:40:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-10 01:40:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-10 01:40:29,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-10 01:40:29,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:29,351 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-10 01:40:29,351 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 01:40:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-10 01:40:29,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-10 01:40:29,352 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:29,354 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:29,354 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:29,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:29,355 INFO L82 PathProgramCache]: Analyzing trace with hash -517174030, now seen corresponding path program 5 times [2019-09-10 01:40:29,355 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:29,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:29,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:29,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:29,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,440 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:29,440 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:29,440 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:29,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,441 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:29,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:29,451 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 01:40:29,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:29,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:29,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 01:40:29,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 01:40:29,529 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 01:40:29,609 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:40:29,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8] total 15 [2019-09-10 01:40:29,610 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:29,610 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:40:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:40:29,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-09-10 01:40:29,612 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2019-09-10 01:40:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:29,657 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-10 01:40:29,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 01:40:29,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-09-10 01:40:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:29,658 INFO L225 Difference]: With dead ends: 14 [2019-09-10 01:40:29,658 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:40:29,659 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-09-10 01:40:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:40:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:40:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:40:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:40:29,660 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-09-10 01:40:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:29,660 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:40:29,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:40:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:40:29,661 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:40:29,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:40:29 BoogieIcfgContainer [2019-09-10 01:40:29,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:40:29,670 INFO L168 Benchmark]: Toolchain (without parser) took 2635.12 ms. Allocated memory was 135.3 MB in the beginning and 230.7 MB in the end (delta: 95.4 MB). Free memory was 91.1 MB in the beginning and 122.6 MB in the end (delta: -31.5 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:29,673 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 135.3 MB. Free memory was 109.7 MB in the beginning and 109.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:40:29,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.67 ms. Allocated memory is still 135.3 MB. Free memory was 90.9 MB in the beginning and 81.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:29,675 INFO L168 Benchmark]: Boogie Preprocessor took 111.10 ms. Allocated memory was 135.3 MB in the beginning and 201.9 MB in the end (delta: 66.6 MB). Free memory was 81.7 MB in the beginning and 178.4 MB in the end (delta: -96.7 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:29,677 INFO L168 Benchmark]: RCFGBuilder took 186.87 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 168.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:29,683 INFO L168 Benchmark]: TraceAbstraction took 2098.87 ms. Allocated memory was 201.9 MB in the beginning and 230.7 MB in the end (delta: 28.8 MB). Free memory was 167.9 MB in the beginning and 122.6 MB in the end (delta: 45.3 MB). Peak memory consumption was 74.1 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:29,690 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 135.3 MB. Free memory was 109.7 MB in the beginning and 109.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.67 ms. Allocated memory is still 135.3 MB. Free memory was 90.9 MB in the beginning and 81.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.10 ms. Allocated memory was 135.3 MB in the beginning and 201.9 MB in the end (delta: 66.6 MB). Free memory was 81.7 MB in the beginning and 178.4 MB in the end (delta: -96.7 MB). Peak memory consumption was 15.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 186.87 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 168.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2098.87 ms. Allocated memory was 201.9 MB in the beginning and 230.7 MB in the end (delta: 28.8 MB). Free memory was 167.9 MB in the beginning and 122.6 MB in the end (delta: 45.3 MB). Peak memory consumption was 74.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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, 18 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 2 SDslu, 172 SDs, 0 SdLazy, 52 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 170 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 140 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 4301 SizeOfPredicates, 21 NumberOfNonLiveVariables, 185 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 40/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...