java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:54:19,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:54:19,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:54:19,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:54:19,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:54:19,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:54:19,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:54:19,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:54:19,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:54:19,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:54:19,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:54:19,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:54:19,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:54:19,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:54:19,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:54:19,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:54:19,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:54:19,949 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 20:54:19,973 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:54:19,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:54:19,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:54:19,974 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:54:19,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:54:19,975 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:54:19,975 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:54:19,975 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:54:19,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:54:19,976 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:54:19,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:54:19,978 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:54:19,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:54:19,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:54:19,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:54:19,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:54:19,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:54:19,979 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:54:19,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:54:19,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:54:19,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:54:19,980 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:54:19,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:54:19,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:54:19,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:54:19,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:54:19,981 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:54:19,981 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:54:19,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:54:19,982 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:54:20,025 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:54:20,037 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:54:20,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:54:20,041 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:54:20,043 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:54:20,044 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2019-09-03 20:54:20,116 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4118560/d04be833b9734b0d969b5e0ca2696017/FLAGf76615726 [2019-09-03 20:54:20,594 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:54:20,595 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2019-09-03 20:54:20,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4118560/d04be833b9734b0d969b5e0ca2696017/FLAGf76615726 [2019-09-03 20:54:20,985 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4118560/d04be833b9734b0d969b5e0ca2696017 [2019-09-03 20:54:20,994 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:54:20,996 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:54:20,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:54:20,997 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:54:21,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:54:21,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:54:20" (1/1) ... [2019-09-03 20:54:21,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@566837db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21, skipping insertion in model container [2019-09-03 20:54:21,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:54:20" (1/1) ... [2019-09-03 20:54:21,011 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:54:21,026 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:54:21,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:54:21,188 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:54:21,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:54:21,214 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:54:21,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21 WrapperNode [2019-09-03 20:54:21,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:54:21,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:54:21,216 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:54:21,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:54:21,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... [2019-09-03 20:54:21,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... [2019-09-03 20:54:21,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... [2019-09-03 20:54:21,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... [2019-09-03 20:54:21,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... [2019-09-03 20:54:21,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... [2019-09-03 20:54:21,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... [2019-09-03 20:54:21,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:54:21,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:54:21,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:54:21,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:54:21,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:54:21,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:54:21,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:54:21,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:54:21,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:54:21,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:54:21,380 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:54:21,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:54:21,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:54:21,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:54:21,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:54:21,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:54:21,550 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:54:21,550 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:54:21,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:54:21 BoogieIcfgContainer [2019-09-03 20:54:21,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:54:21,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:54:21,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:54:21,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:54:21,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:54:20" (1/3) ... [2019-09-03 20:54:21,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2764f8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:54:21, skipping insertion in model container [2019-09-03 20:54:21,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:54:21" (2/3) ... [2019-09-03 20:54:21,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2764f8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:54:21, skipping insertion in model container [2019-09-03 20:54:21,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:54:21" (3/3) ... [2019-09-03 20:54:21,574 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2019-09-03 20:54:21,600 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:54:21,617 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:54:21,642 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:54:21,687 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:54:21,688 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:54:21,688 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:54:21,688 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:54:21,688 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:54:21,688 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:54:21,688 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:54:21,689 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:54:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 20:54:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:54:21,708 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:54:21,708 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:54:21,710 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:54:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:54:21,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2009018560, now seen corresponding path program 1 times [2019-09-03 20:54:21,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:54:21,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:21,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:54:21,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:21,760 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:54:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:54:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:21,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:54:21,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:54:21,816 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:54:21,820 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:54:21,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:54:21,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:54:21,832 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 20:54:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:54:21,846 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 20:54:21,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:54:21,847 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:54:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:54:21,854 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:54:21,855 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:54:21,856 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 20:54:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:54:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:54:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:54:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 20:54:21,887 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 20:54:21,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:54:21,887 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 20:54:21,887 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:54:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 20:54:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:54:21,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:54:21,888 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:54:21,889 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:54:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:54:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2019177291, now seen corresponding path program 1 times [2019-09-03 20:54:21,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:54:21,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:21,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:54:21,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:21,891 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:54:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:54:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:21,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:54:21,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:54:21,989 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:54:21,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:54:21,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:54:21,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:54:21,991 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 20:54:22,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:54:22,068 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-03 20:54:22,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:54:22,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:54:22,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:54:22,069 INFO L225 Difference]: With dead ends: 25 [2019-09-03 20:54:22,070 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 20:54:22,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:54:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 20:54:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-03 20:54:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:54:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-03 20:54:22,078 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2019-09-03 20:54:22,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:54:22,078 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-03 20:54:22,079 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:54:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-03 20:54:22,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:54:22,079 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:54:22,080 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:54:22,080 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:54:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:54:22,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1543015754, now seen corresponding path program 1 times [2019-09-03 20:54:22,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:54:22,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:22,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:54:22,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:22,082 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:54:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:54:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:22,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:54:22,145 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:54:22,145 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-03 20:54:22,147 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [16], [20], [28], [31], [33], [39], [40], [41], [43] [2019-09-03 20:54:22,174 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:54:22,174 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:54:22,281 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:54:22,284 INFO L272 AbstractInterpreter]: Visited 13 different actions 37 times. Merged at 4 different actions 12 times. Widened at 1 different actions 1 times. Performed 64 root evaluator evaluations with a maximum evaluation depth of 4. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-09-03 20:54:22,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:54:22,289 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:54:22,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:54:22,290 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:54:22,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:54:22,308 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:54:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:54:22,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:54:22,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:54:22,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:54:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:22,396 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:54:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:22,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-03 20:54:22,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2019-09-03 20:54:22,422 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 20:54:22,423 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:54:22,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:54:22,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:54:22,424 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2019-09-03 20:54:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:54:22,521 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-09-03 20:54:22,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:54:22,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-09-03 20:54:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:54:22,525 INFO L225 Difference]: With dead ends: 28 [2019-09-03 20:54:22,525 INFO L226 Difference]: Without dead ends: 26 [2019-09-03 20:54:22,526 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:54:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-03 20:54:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2019-09-03 20:54:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:54:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-03 20:54:22,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-03 20:54:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:54:22,534 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-03 20:54:22,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:54:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-03 20:54:22,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 20:54:22,536 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:54:22,536 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:54:22,537 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:54:22,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:54:22,537 INFO L82 PathProgramCache]: Analyzing trace with hash -595645528, now seen corresponding path program 1 times [2019-09-03 20:54:22,538 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:54:22,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:22,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:54:22,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:22,539 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:54:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:54:22,621 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 20:54:22,622 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:54:22,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 20:54:22,622 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:54:22,623 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:54:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:54:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:54:22,623 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-09-03 20:54:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:54:22,700 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-09-03 20:54:22,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:54:22,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-09-03 20:54:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:54:22,702 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:54:22,702 INFO L226 Difference]: Without dead ends: 21 [2019-09-03 20:54:22,703 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:54:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-03 20:54:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-09-03 20:54:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-03 20:54:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-09-03 20:54:22,709 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2019-09-03 20:54:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:54:22,711 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-09-03 20:54:22,712 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:54:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-09-03 20:54:22,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 20:54:22,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:54:22,713 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:54:22,713 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:54:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:54:22,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1695932857, now seen corresponding path program 1 times [2019-09-03 20:54:22,714 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:54:22,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:22,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:54:22,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:54:22,717 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:54:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:54:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:22,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:54:22,795 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:54:22,795 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2019-09-03 20:54:22,796 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [16], [20], [28], [31], [33], [36], [38], [39], [40], [41], [43], [44], [45] [2019-09-03 20:54:22,802 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:54:22,802 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:54:22,926 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 20:54:22,926 INFO L272 AbstractInterpreter]: Visited 17 different actions 73 times. Merged at 5 different actions 15 times. Widened at 1 different actions 1 times. Performed 102 root evaluator evaluations with a maximum evaluation depth of 6. Performed 102 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-09-03 20:54:22,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:54:22,927 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 20:54:22,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:54:22,927 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 20:54:22,966 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:54:22,966 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 20:54:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:54:22,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:54:22,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:54:23,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:54:23,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:23,099 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 20:54:23,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:54:23,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:54:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:54:23,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:54:23,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 15 [2019-09-03 20:54:23,222 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:54:23,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:54:23,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:54:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:54:23,224 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2019-09-03 20:54:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:54:23,301 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-09-03 20:54:23,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:54:23,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-09-03 20:54:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:54:23,301 INFO L225 Difference]: With dead ends: 17 [2019-09-03 20:54:23,301 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:54:23,302 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:54:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:54:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:54:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:54:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:54:23,303 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-09-03 20:54:23,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:54:23,303 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:54:23,304 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:54:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:54:23,304 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:54:23,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:54:23 BoogieIcfgContainer [2019-09-03 20:54:23,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:54:23,311 INFO L168 Benchmark]: Toolchain (without parser) took 2315.01 ms. Allocated memory was 137.9 MB in the beginning and 224.4 MB in the end (delta: 86.5 MB). Free memory was 87.3 MB in the beginning and 153.7 MB in the end (delta: -66.4 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:54:23,312 INFO L168 Benchmark]: CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 105.9 MB in the beginning and 105.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:54:23,313 INFO L168 Benchmark]: CACSL2BoogieTranslator took 218.66 ms. Allocated memory is still 137.9 MB. Free memory was 86.9 MB in the beginning and 77.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:54:23,314 INFO L168 Benchmark]: Boogie Preprocessor took 111.86 ms. Allocated memory was 137.9 MB in the beginning and 198.7 MB in the end (delta: 60.8 MB). Free memory was 77.8 MB in the beginning and 176.3 MB in the end (delta: -98.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-09-03 20:54:23,315 INFO L168 Benchmark]: RCFGBuilder took 224.09 ms. Allocated memory is still 198.7 MB. Free memory was 176.3 MB in the beginning and 165.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:54:23,316 INFO L168 Benchmark]: TraceAbstraction took 1754.85 ms. Allocated memory was 198.7 MB in the beginning and 224.4 MB in the end (delta: 25.7 MB). Free memory was 164.6 MB in the beginning and 153.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2019-09-03 20:54:23,320 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46 ms. Allocated memory is still 137.9 MB. Free memory was 105.9 MB in the beginning and 105.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 218.66 ms. Allocated memory is still 137.9 MB. Free memory was 86.9 MB in the beginning and 77.8 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 111.86 ms. Allocated memory was 137.9 MB in the beginning and 198.7 MB in the end (delta: 60.8 MB). Free memory was 77.8 MB in the beginning and 176.3 MB in the end (delta: -98.5 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 224.09 ms. Allocated memory is still 198.7 MB. Free memory was 176.3 MB in the beginning and 165.2 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1754.85 ms. Allocated memory was 198.7 MB in the beginning and 224.4 MB in the end (delta: 25.7 MB). Free memory was 164.6 MB in the beginning and 153.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 1.6s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 73 SDtfs, 40 SDslu, 156 SDs, 0 SdLazy, 103 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 119 ConstructedInterpolants, 0 QuantifiedInterpolants, 4273 SizeOfPredicates, 8 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 8/14 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...