/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:03:21,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:03:21,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:03:21,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 06:03:21,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 06:03:21,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 06:03:21,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 06:03:21,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 06:03:21,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 06:03:21,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 06:03:21,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 06:03:21,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 06:03:21,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:03:21,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:03:21,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:03:21,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:03:21,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:03:21,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:03:21,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:03:21,587 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:03:21,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:03:21,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:03:21,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:03:21,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:03:21,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 06:03:21,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 06:03:21,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 06:03:21,595 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 06:03:21,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 06:03:21,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 06:03:21,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 06:03:21,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 06:03:21,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 06:03:21,599 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 06:03:21,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 06:03:21,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 06:03:21,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 06:03:21,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 06:03:21,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:03:21,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:03:21,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:03:21,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 06:03:21,630 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:03:21,631 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:03:21,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:03:21,632 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:03:21,632 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:03:21,632 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:03:21,633 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:03:21,633 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:03:21,633 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:03:21,633 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:03:21,634 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:03:21,634 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:03:21,635 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:03:21,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:03:21,635 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:03:21,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:03:21,637 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:03:21,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:03:21,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:03:21,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:03:21,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:03:21,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:03:21,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:03:21,638 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:03:21,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:03:21,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:03:21,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:03:21,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:03:21,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:03:21,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:03:21,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:03:21,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:03:21,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:03:21,641 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:03:21,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:03:21,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:03:21,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:03:21,642 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:03:21,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:03:21,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:03:21,934 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:03:21,935 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:03:21,935 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:03:21,935 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2019-11-24 06:03:21,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d002e0f/763f39053a9c4a0d9cd46dddfb93321f/FLAG447876897 [2019-11-24 06:03:22,446 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:03:22,447 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2019-11-24 06:03:22,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d002e0f/763f39053a9c4a0d9cd46dddfb93321f/FLAG447876897 [2019-11-24 06:03:22,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d002e0f/763f39053a9c4a0d9cd46dddfb93321f [2019-11-24 06:03:22,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:03:22,855 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:03:22,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:22,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:03:22,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:03:22,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:22" (1/1) ... [2019-11-24 06:03:22,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2888addc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:22, skipping insertion in model container [2019-11-24 06:03:22,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:03:22" (1/1) ... [2019-11-24 06:03:22,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:03:22,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:03:23,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:23,100 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:03:23,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:03:23,131 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:03:23,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23 WrapperNode [2019-11-24 06:03:23,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:03:23,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:23,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:03:23,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:03:23,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:03:23,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:03:23,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:03:23,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:03:23,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (1/1) ... [2019-11-24 06:03:23,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:03:23,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:03:23,277 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:03:23,277 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:03:23,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (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 [2019-11-24 06:03:23,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:03:23,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:03:23,691 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:03:23,692 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-24 06:03:23,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:23 BoogieIcfgContainer [2019-11-24 06:03:23,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:03:23,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:03:23,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:03:23,696 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:03:23,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:03:22" (1/3) ... [2019-11-24 06:03:23,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6567e973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:23, skipping insertion in model container [2019-11-24 06:03:23,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:03:23" (2/3) ... [2019-11-24 06:03:23,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6567e973 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:03:23, skipping insertion in model container [2019-11-24 06:03:23,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:03:23" (3/3) ... [2019-11-24 06:03:23,699 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2019-11-24 06:03:23,707 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:03:23,713 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:03:23,722 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:03:23,747 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:03:23,747 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:03:23,747 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:03:23,747 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:03:23,747 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:03:23,747 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:03:23,748 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:03:23,748 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:03:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-11-24 06:03:23,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 06:03:23,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:23,769 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 06:03:23,769 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:23,776 INFO L82 PathProgramCache]: Analyzing trace with hash 963424, now seen corresponding path program 1 times [2019-11-24 06:03:23,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:23,786 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798900859] [2019-11-24 06:03:23,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:23,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798900859] [2019-11-24 06:03:23,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:23,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:03:23,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752416781] [2019-11-24 06:03:23,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:23,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:23,941 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2019-11-24 06:03:24,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:24,025 INFO L93 Difference]: Finished difference Result 44 states and 71 transitions. [2019-11-24 06:03:24,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:24,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 06:03:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:24,038 INFO L225 Difference]: With dead ends: 44 [2019-11-24 06:03:24,038 INFO L226 Difference]: Without dead ends: 23 [2019-11-24 06:03:24,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-24 06:03:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-24 06:03:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-24 06:03:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2019-11-24 06:03:24,082 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 4 [2019-11-24 06:03:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:24,082 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2019-11-24 06:03:24,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2019-11-24 06:03:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 06:03:24,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:24,083 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-11-24 06:03:24,084 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1361043087, now seen corresponding path program 1 times [2019-11-24 06:03:24,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:24,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017539654] [2019-11-24 06:03:24,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:24,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017539654] [2019-11-24 06:03:24,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758846788] [2019-11-24 06:03:24,122 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 [2019-11-24 06:03:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:24,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-24 06:03:24,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:03:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:24,185 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:03:24,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 06:03:24,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-24 06:03:24,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 4 [2019-11-24 06:03:24,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821705764] [2019-11-24 06:03:24,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:24,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:24,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:24,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 06:03:24,211 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2019-11-24 06:03:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:24,260 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2019-11-24 06:03:24,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:24,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-24 06:03:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:24,264 INFO L225 Difference]: With dead ends: 39 [2019-11-24 06:03:24,265 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 06:03:24,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 06:03:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 06:03:24,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-11-24 06:03:24,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-24 06:03:24,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2019-11-24 06:03:24,279 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 7 [2019-11-24 06:03:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:24,279 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2019-11-24 06:03:24,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2019-11-24 06:03:24,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 06:03:24,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:24,280 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:24,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:03:24,484 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:24,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:24,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1218689736, now seen corresponding path program 1 times [2019-11-24 06:03:24,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:24,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572054610] [2019-11-24 06:03:24,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:24,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:24,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572054610] [2019-11-24 06:03:24,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259340932] [2019-11-24 06:03:24,550 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 [2019-11-24 06:03:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:24,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 06:03:24,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:03:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:24,605 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:03:24,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:24,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 06:03:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 06:03:24,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-24 06:03:24,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 6 [2019-11-24 06:03:24,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269137042] [2019-11-24 06:03:24,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:24,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:24,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:24,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:03:24,659 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand 3 states. [2019-11-24 06:03:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:24,718 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2019-11-24 06:03:24,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:24,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-24 06:03:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:24,721 INFO L225 Difference]: With dead ends: 49 [2019-11-24 06:03:24,721 INFO L226 Difference]: Without dead ends: 47 [2019-11-24 06:03:24,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 06:03:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-24 06:03:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-24 06:03:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-24 06:03:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2019-11-24 06:03:24,743 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 13 [2019-11-24 06:03:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:24,744 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2019-11-24 06:03:24,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2019-11-24 06:03:24,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 06:03:24,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:24,746 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:24,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:03:24,960 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1363482189, now seen corresponding path program 1 times [2019-11-24 06:03:24,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:24,962 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885535973] [2019-11-24 06:03:24,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 06:03:25,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885535973] [2019-11-24 06:03:25,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:03:25,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:03:25,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360650315] [2019-11-24 06:03:25,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:25,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:25,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:25,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:03:25,010 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 3 states. [2019-11-24 06:03:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:25,064 INFO L93 Difference]: Finished difference Result 101 states and 145 transitions. [2019-11-24 06:03:25,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:25,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 06:03:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:25,065 INFO L225 Difference]: With dead ends: 101 [2019-11-24 06:03:25,066 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 06:03:25,066 INFO L630 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 [2019-11-24 06:03:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 06:03:25,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2019-11-24 06:03:25,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-24 06:03:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2019-11-24 06:03:25,074 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2019-11-24 06:03:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:25,074 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2019-11-24 06:03:25,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:25,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2019-11-24 06:03:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-24 06:03:25,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:25,076 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:25,076 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:25,076 INFO L82 PathProgramCache]: Analyzing trace with hash -451599084, now seen corresponding path program 1 times [2019-11-24 06:03:25,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:25,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507887645] [2019-11-24 06:03:25,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:03:25,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507887645] [2019-11-24 06:03:25,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831294661] [2019-11-24 06:03:25,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:03:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:25,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:03:25,213 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:03:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 06:03:25,229 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:03:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 06:03:25,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:03:25,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-24 06:03:25,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627175906] [2019-11-24 06:03:25,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:25,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:25,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 06:03:25,235 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand 3 states. [2019-11-24 06:03:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:25,261 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2019-11-24 06:03:25,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:25,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-24 06:03:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:25,262 INFO L225 Difference]: With dead ends: 63 [2019-11-24 06:03:25,262 INFO L226 Difference]: Without dead ends: 41 [2019-11-24 06:03:25,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 06:03:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-24 06:03:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-24 06:03:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-24 06:03:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2019-11-24 06:03:25,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 21 [2019-11-24 06:03:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:25,271 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2019-11-24 06:03:25,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2019-11-24 06:03:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-24 06:03:25,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:03:25,272 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:03:25,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:03:25,476 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:03:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:03:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1194654199, now seen corresponding path program 1 times [2019-11-24 06:03:25,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:03:25,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767228236] [2019-11-24 06:03:25,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:03:25,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-24 06:03:25,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767228236] [2019-11-24 06:03:25,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219463526] [2019-11-24 06:03:25,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:03:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:03:25,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:03:25,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:03:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 06:03:25,586 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:03:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-24 06:03:25,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 06:03:25,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-24 06:03:25,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199278276] [2019-11-24 06:03:25,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:03:25,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:03:25,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:03:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 06:03:25,596 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 3 states. [2019-11-24 06:03:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:03:25,612 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2019-11-24 06:03:25,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:03:25,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-24 06:03:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:03:25,614 INFO L225 Difference]: With dead ends: 64 [2019-11-24 06:03:25,614 INFO L226 Difference]: Without dead ends: 0 [2019-11-24 06:03:25,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-24 06:03:25,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-24 06:03:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-24 06:03:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-24 06:03:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-24 06:03:25,616 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2019-11-24 06:03:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:03:25,616 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-24 06:03:25,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:03:25,617 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-24 06:03:25,618 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-24 06:03:25,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 06:03:25,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-24 06:03:26,016 INFO L444 ceAbstractionStarter]: For program point L77-1(lines 53 106) no Hoare annotation was computed. [2019-11-24 06:03:26,017 INFO L447 ceAbstractionStarter]: At program point L139(lines 8 140) the Hoare annotation is: true [2019-11-24 06:03:26,017 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-24 06:03:26,017 INFO L440 ceAbstractionStarter]: At program point L24(lines 24 127) the Hoare annotation is: (or (and (< ULTIMATE.start_main_~blastFlag~0 5) (<= 8640 ULTIMATE.start_main_~s__state~0)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (= 8640 ULTIMATE.start_main_~s__state~0) (not (= ULTIMATE.start_main_~s__hit~0 0)))) [2019-11-24 06:03:26,017 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) no Hoare annotation was computed. [2019-11-24 06:03:26,017 INFO L440 ceAbstractionStarter]: At program point L49(lines 49 108) the Hoare annotation is: (< ULTIMATE.start_main_~blastFlag~0 5) [2019-11-24 06:03:26,018 INFO L440 ceAbstractionStarter]: At program point L45(lines 45 110) the Hoare annotation is: (or (and (< ULTIMATE.start_main_~blastFlag~0 5) (<= 8640 ULTIMATE.start_main_~s__state~0)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (= 8640 ULTIMATE.start_main_~s__state~0) (not (= ULTIMATE.start_main_~s__hit~0 0)))) [2019-11-24 06:03:26,018 INFO L447 ceAbstractionStarter]: At program point L136(lines 8 140) the Hoare annotation is: true [2019-11-24 06:03:26,018 INFO L440 ceAbstractionStarter]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (< ULTIMATE.start_main_~blastFlag~0 5) (<= 8640 ULTIMATE.start_main_~s__state~0)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (= 8640 ULTIMATE.start_main_~s__state~0) (not (= ULTIMATE.start_main_~s__hit~0 0)))) [2019-11-24 06:03:26,018 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-24 06:03:26,018 INFO L444 ceAbstractionStarter]: For program point L95(lines 95 97) no Hoare annotation was computed. [2019-11-24 06:03:26,018 INFO L440 ceAbstractionStarter]: At program point L29(lines 29 124) the Hoare annotation is: (or (and (< ULTIMATE.start_main_~blastFlag~0 5) (<= 8640 ULTIMATE.start_main_~s__state~0)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (= 8640 ULTIMATE.start_main_~s__state~0) (not (= ULTIMATE.start_main_~s__hit~0 0)))) [2019-11-24 06:03:26,019 INFO L440 ceAbstractionStarter]: At program point L96(lines 8 140) the Hoare annotation is: false [2019-11-24 06:03:26,019 INFO L444 ceAbstractionStarter]: For program point L92-1(lines 53 106) no Hoare annotation was computed. [2019-11-24 06:03:26,019 INFO L444 ceAbstractionStarter]: For program point L88-1(lines 53 106) no Hoare annotation was computed. [2019-11-24 06:03:26,019 INFO L444 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2019-11-24 06:03:26,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 06:03:26 BoogieIcfgContainer [2019-11-24 06:03:26,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-24 06:03:26,044 INFO L168 Benchmark]: Toolchain (without parser) took 3190.66 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 101.1 MB in the beginning and 157.1 MB in the end (delta: -56.0 MB). Peak memory consumption was 40.5 MB. Max. memory is 7.1 GB. [2019-11-24 06:03:26,050 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-11-24 06:03:26,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.98 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2019-11-24 06:03:26,053 INFO L168 Benchmark]: Boogie Procedure Inliner took 107.90 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 90.6 MB in the beginning and 180.1 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2019-11-24 06:03:26,053 INFO L168 Benchmark]: Boogie Preprocessor took 36.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 179.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. [2019-11-24 06:03:26,054 INFO L168 Benchmark]: RCFGBuilder took 415.78 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 161.1 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2019-11-24 06:03:26,058 INFO L168 Benchmark]: TraceAbstraction took 2347.31 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 160.5 MB in the beginning and 157.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. [2019-11-24 06:03:26,070 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.98 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.6 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 107.90 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 90.6 MB in the beginning and 180.1 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.1 MB in the beginning and 179.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.78 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 161.1 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2347.31 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 160.5 MB in the beginning and 157.1 MB in the end (delta: 3.4 MB). Peak memory consumption was 35.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: 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: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: blastFlag < 5 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: ((blastFlag < 5 && 8640 <= s__state) || blastFlag <= 2) || (8640 == s__state && !(s__hit == 0)) - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((blastFlag < 5 && 8640 <= s__state) || blastFlag <= 2) || (8640 == s__state && !(s__hit == 0)) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((blastFlag < 5 && 8640 <= s__state) || blastFlag <= 2) || (8640 == s__state && !(s__hit == 0)) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((blastFlag < 5 && 8640 <= s__state) || blastFlag <= 2) || (8640 == s__state && !(s__hit == 0)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Result: SAFE, OverallTime: 2.2s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 99 SDtfs, 34 SDslu, 47 SDs, 0 SdLazy, 74 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 126 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=3, 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, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 42 NumberOfFragments, 82 HoareAnnotationTreeSize, 8 FomulaSimplifications, 324 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 28 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 209 ConstructedInterpolants, 0 QuantifiedInterpolants, 7269 SizeOfPredicates, 2 NumberOfNonLiveVariables, 145 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 123/139 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...