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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:22:25,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:22:25,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:22:25,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:22:25,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:22:25,543 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:22:25,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:22:25,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:22:25,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:22:25,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:22:25,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:22:25,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:22:25,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:22:25,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:22:25,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:22:25,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:22:25,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:22:25,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:22:25,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:22:25,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:22:25,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:22:25,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:22:25,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:22:25,583 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:22:25,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:22:25,597 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:22:25,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:22:25,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:22:25,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:22:25,624 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:22:25,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:22:25,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:22:25,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:22:25,627 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:22:25,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:22:25,628 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:22:25,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:22:25,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:22:25,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:22:25,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:22:25,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:22:25,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:22:25,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:22:25,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:22:25,631 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:22:25,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:22:25,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:22:25,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:22:25,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:22:25,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:22:25,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:22:25,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:22:25,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:22:25,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:22:25,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:22:25,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:22:25,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:22:25,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:22:25,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:22:25,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:22:25,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:22:25,926 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:22:25,926 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:22:25,927 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-15 01:22:26,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74c61521/8bcbf47f4ff44e509a8f5547708f203e/FLAGd5fe208c1 [2019-10-15 01:22:26,457 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:22:26,457 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-15 01:22:26,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74c61521/8bcbf47f4ff44e509a8f5547708f203e/FLAGd5fe208c1 [2019-10-15 01:22:26,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f74c61521/8bcbf47f4ff44e509a8f5547708f203e [2019-10-15 01:22:26,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:22:26,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:22:26,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:22:26,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:22:26,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:22:26,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26, skipping insertion in model container [2019-10-15 01:22:26,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,883 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:22:26,898 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:22:27,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:22:27,071 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:22:27,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:22:27,109 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:22:27,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27 WrapperNode [2019-10-15 01:22:27,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:22:27,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:22:27,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:22:27,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:22:27,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (1/1) ... [2019-10-15 01:22:27,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (1/1) ... [2019-10-15 01:22:27,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (1/1) ... [2019-10-15 01:22:27,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (1/1) ... [2019-10-15 01:22:27,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (1/1) ... [2019-10-15 01:22:27,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (1/1) ... [2019-10-15 01:22:27,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (1/1) ... [2019-10-15 01:22:27,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:22:27,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:22:27,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:22:27,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:22:27,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (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 [2019-10-15 01:22:27,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:22:27,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:22:27,289 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-15 01:22:27,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:22:27,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:22:27,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:22:27,289 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-15 01:22:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:22:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:22:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:22:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:22:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:22:27,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:22:27,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:22:27,654 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:22:27,655 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:22:27,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:22:27 BoogieIcfgContainer [2019-10-15 01:22:27,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:22:27,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:22:27,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:22:27,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:22:27,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:22:26" (1/3) ... [2019-10-15 01:22:27,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9055ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:22:27, skipping insertion in model container [2019-10-15 01:22:27,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:27" (2/3) ... [2019-10-15 01:22:27,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b9055ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:22:27, skipping insertion in model container [2019-10-15 01:22:27,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:22:27" (3/3) ... [2019-10-15 01:22:27,664 INFO L109 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2019-10-15 01:22:27,672 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:22:27,679 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:22:27,691 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:22:27,716 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:22:27,716 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:22:27,716 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:22:27,716 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:22:27,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:22:27,717 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:22:27,717 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:22:27,717 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:22:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-15 01:22:27,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:22:27,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:27,745 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:27,747 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:27,752 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-15 01:22:27,759 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:27,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166520079] [2019-10-15 01:22:27,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:22:27,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166520079] [2019-10-15 01:22:27,925 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:27,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:22:27,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838541138] [2019-10-15 01:22:27,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:22:27,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:22:27,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:27,950 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-15 01:22:27,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:27,979 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-15 01:22:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:22:27,981 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-10-15 01:22:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:27,991 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:22:27,992 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:22:27,996 INFO L600 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 [2019-10-15 01:22:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:22:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-15 01:22:28,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:22:28,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-15 01:22:28,050 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-15 01:22:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:28,051 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-15 01:22:28,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:22:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-15 01:22:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:22:28,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:28,054 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:28,055 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-15 01:22:28,056 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:28,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703738123] [2019-10-15 01:22:28,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:22:28,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703738123] [2019-10-15 01:22:28,181 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:28,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:22:28,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895790288] [2019-10-15 01:22:28,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:28,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:28,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:28,186 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-15 01:22:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:28,234 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-15 01:22:28,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:28,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-15 01:22:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:28,238 INFO L225 Difference]: With dead ends: 48 [2019-10-15 01:22:28,238 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:22:28,240 INFO L600 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 [2019-10-15 01:22:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:22:28,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-15 01:22:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:22:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-15 01:22:28,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-15 01:22:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:28,254 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-15 01:22:28,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:28,255 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-15 01:22:28,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:22:28,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:28,257 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:28,257 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:28,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:28,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-15 01:22:28,259 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:28,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051620672] [2019-10-15 01:22:28,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,261 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:22:28,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051620672] [2019-10-15 01:22:28,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304097643] [2019-10-15 01:22:28,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:22:28,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:22:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:22:28,516 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:22:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:22:28,566 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:22:28,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:22:28,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618656821] [2019-10-15 01:22:28,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:28,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:28,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:28,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:22:28,568 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-15 01:22:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:28,593 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-15 01:22:28,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:28,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-15 01:22:28,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:28,597 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:22:28,597 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:22:28,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:22:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:22:28,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-15 01:22:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:22:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-15 01:22:28,611 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-15 01:22:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:28,611 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-15 01:22:28,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:28,611 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-15 01:22:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:22:28,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:28,617 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:28,821 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:28,822 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:28,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:28,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-15 01:22:28,823 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:28,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420755911] [2019-10-15 01:22:28,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:28,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420755911] [2019-10-15 01:22:28,924 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:28,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:22:28,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224112018] [2019-10-15 01:22:28,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:28,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:28,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:28,927 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-10-15 01:22:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:28,958 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-15 01:22:28,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:28,959 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-15 01:22:28,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:28,961 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:22:28,961 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:22:28,962 INFO L600 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 [2019-10-15 01:22:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:22:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-15 01:22:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:22:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-15 01:22:28,974 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-15 01:22:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:28,978 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-15 01:22:28,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-15 01:22:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:22:28,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:28,982 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:28,982 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:28,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-15 01:22:28,983 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:28,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459817455] [2019-10-15 01:22:28,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:29,147 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459817455] [2019-10-15 01:22:29,148 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839363081] [2019-10-15 01:22:29,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:29,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:22:29,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:22:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:29,233 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:22:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:29,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1137311663] [2019-10-15 01:22:29,283 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 46 [2019-10-15 01:22:29,319 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:22:29,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:22:29,381 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:22:29,383 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 30 variables. [2019-10-15 01:22:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:29,386 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:22:29,426 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-15 01:22:29,427 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:22:29,429 INFO L553 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2019-10-15 01:22:29,429 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:22:29,430 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:22:29,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-10-15 01:22:29,430 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428785882] [2019-10-15 01:22:29,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:22:29,432 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:29,432 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:22:29,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:22:29,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:29,432 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 2 states. [2019-10-15 01:22:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:29,435 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-10-15 01:22:29,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:22:29,435 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2019-10-15 01:22:29,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:29,435 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:22:29,435 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:22:29,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:22:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:22:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:22:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:22:29,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-10-15 01:22:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:29,437 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:22:29,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:22:29,438 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:22:29,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:22:29,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:29,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:22:29,685 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,685 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:22:29,685 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,685 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,685 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 01:22:29,686 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:22:29,686 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,686 INFO L439 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: false [2019-10-15 01:22:29,686 INFO L443 ceAbstractionStarter]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2019-10-15 01:22:29,686 INFO L443 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed. [2019-10-15 01:22:29,686 INFO L439 ceAbstractionStarter]: At program point L35-3(lines 35 37) the Hoare annotation is: false [2019-10-15 01:22:29,686 INFO L443 ceAbstractionStarter]: For program point L35-4(lines 35 37) no Hoare annotation was computed. [2019-10-15 01:22:29,687 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2019-10-15 01:22:29,687 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2019-10-15 01:22:29,687 INFO L443 ceAbstractionStarter]: For program point L42(line 42) no Hoare annotation was computed. [2019-10-15 01:22:29,687 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed. [2019-10-15 01:22:29,687 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-10-15 01:22:29,687 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2019-10-15 01:22:29,688 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-10-15 01:22:29,688 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-10-15 01:22:29,688 INFO L439 ceAbstractionStarter]: At program point L26-4(lines 26 28) the Hoare annotation is: false [2019-10-15 01:22:29,688 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 43) no Hoare annotation was computed. [2019-10-15 01:22:29,688 INFO L439 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: false [2019-10-15 01:22:29,688 INFO L443 ceAbstractionStarter]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2019-10-15 01:22:29,688 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-10-15 01:22:29,688 INFO L443 ceAbstractionStarter]: For program point sepFINAL(lines 4 15) no Hoare annotation was computed. [2019-10-15 01:22:29,689 INFO L446 ceAbstractionStarter]: At program point sepENTRY(lines 4 15) the Hoare annotation is: true [2019-10-15 01:22:29,689 INFO L443 ceAbstractionStarter]: For program point sepEXIT(lines 4 15) no Hoare annotation was computed. [2019-10-15 01:22:29,689 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 12) no Hoare annotation was computed. [2019-10-15 01:22:29,689 INFO L443 ceAbstractionStarter]: For program point L7-2(lines 7 13) no Hoare annotation was computed. [2019-10-15 01:22:29,689 INFO L446 ceAbstractionStarter]: At program point L7-3(lines 7 13) the Hoare annotation is: true [2019-10-15 01:22:29,689 INFO L443 ceAbstractionStarter]: For program point L7-4(lines 7 13) no Hoare annotation was computed. [2019-10-15 01:22:29,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:22:29 BoogieIcfgContainer [2019-10-15 01:22:29,700 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:22:29,705 INFO L168 Benchmark]: Toolchain (without parser) took 2835.91 ms. Allocated memory was 138.9 MB in the beginning and 234.9 MB in the end (delta: 95.9 MB). Free memory was 103.5 MB in the beginning and 164.9 MB in the end (delta: -61.4 MB). Peak memory consumption was 34.6 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,708 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.13 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,715 INFO L168 Benchmark]: Boogie Preprocessor took 118.64 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.9 MB in the beginning and 180.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,716 INFO L168 Benchmark]: RCFGBuilder took 427.28 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 163.7 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,718 INFO L168 Benchmark]: TraceAbstraction took 2043.33 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 163.7 MB in the beginning and 164.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 30.8 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,726 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.13 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 92.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.64 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.9 MB in the beginning and 180.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 427.28 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 163.7 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2043.33 ms. Allocated memory was 202.9 MB in the beginning and 234.9 MB in the end (delta: 32.0 MB). Free memory was 163.7 MB in the beginning and 164.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 30.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. Result: SAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 5 SDslu, 84 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 33 PreInvPairs, 33 NumberOfFragments, 11 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 265 NumberOfCodeBlocks, 265 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 13897 SizeOfPredicates, 2 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 198/217 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 103, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9602272727272727, AVG_VARS_REMOVED_DURING_WEAKENING: 1.2272727272727273, AVG_WEAKENED_CONJUNCTS: 0.13636363636363635, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...